Consulta: subjectFacets:"Selection"
Registros recuperados: 204
Data/hora: 11/06/2024 12:41:14

Identificación de unidades productoras de germoplasma forestal en la UMAF 2702ST Sierra de Tenosique Tabasco.
Provedor de dados: 32
Autores: Megia Vera, Héctor Javier.
El presente estudio se realizó con el objetivo de Identificar y seleccionar una Unidad Producctora de Germoplasma Forestal de Caoba (Swietenia macrophylla King) en la UMAF-2702ST Sierra de Tenosique Tabasco, donde se seleccionaron árboles de caoba con características fenotípicas deseables. A cada árbol se le midió: altura (At, m), diámetro (DAP, cm), longitud de la copa (Lc, m), rectitud del fuste (R) y sanidad (S), se realizó un análisis estadístico descriptivo, uno de componentes principales (ACP) y una correlación entre At y DAP con la R. La obtención de las dimensiones de la semilla (largo y ancho) se realizó a través de las herramientas del software del equipo de Rayos-X Faxitron (MX-20, Faxitron X-ray Corporation, Wheeling, IL, USA), calibrado a 120...
Palavras-chave: Germoplasma; Variación; Selección; Fenotípica; Germinación; Germplasm variation; Selection; Phenotypic germination; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1748

Contribución al conocimiento del árbol de cirián (Crescentia alata Kunth.) variabilidad, selección, morfología, citogenética y fitoquímica.
Provedor de dados: 32
Autores: Peralta Valverde, Gabriel.
El cirián es un árbol medicinal con frutos esféricos que contiene iridoides y polifenoles los que confieren propiedades anti-inflamatorias, antioxidantes y antimicrobianas. La presente investigación se realizó en la región de Tierra Caliente, Michoacán, México en la Depresión del Balsas, la cual es uno de los refugios pleistocénicos más extensos de Norteamérica y centro de origen y domesticación del maíz; el árbol de cirián, es una especie emblemática de esta región y probablemente constituyó una fuente importante de alimento para los grupos humanos que colonizaron el centro-occidente de México hace más de treinta mil años. Los frutos de cirián partidos por la mitad sirven como recipientes que debieron ser de gran utilidad para el Hombre Temprano en México...
Palavras-chave: Depresión del Balsas; Compuestos fenólicos; Antioxidantes; Selección; Número cromosómico; Balsas Basin; Phenolics compounds; Antioxidants; Selection; Chromosome number; Genética; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/749

Decline of genetic variability in a captive population of Pacific white shrimp Penaeus (Litopenaeus) vannamei using microsatellite and pedigree information
Provedor de dados: 69
Autores: Vela Avitúa,Sergio; Montaldo,Hugo H; Márquez Valdelamar,Laura; Campos Montes,Gabriel R; Castillo Juárez,Héctor.
Background: The objective of this study was to estimate the decline of genetic variability and the changes in effective population size in three shrimp populations. One was a wild population collected at several points in the Mexican Pacific Ocean. The other two populations were different generations (7 and 9) from a captive population selected for growth and survival. Microsatellite markers and pedigree were both used to assess genetic variability and effective population size. Results: Using 26 loci, both captive populations showed a decline in the expected heterozygosity (20%) and allelic diversity indices (48 to 91%) compared to the wild population (P &lt; 0.05). The studied captive populations did not differ significantly from each other regarding...
Tipo: Journal article
Palavras-chave: Effective population size; Genetic diversity; Heterozygosity; Microsatellites; Selection; Shrimp.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400009

Rooting in Km selective media as efficient in vitro selection method for sunflower genetic transformation
Provedor de dados: 69
Autores: Radonic,Laura Mabel; Zimmermann,Julián Marcos; Zavallo,Diego; López,Nilda; López Bilbao,Marisa.
Despite of numerous publications in sunflower genetic transformation, there is no efficient or reproducible protocol with low number of escapes. The latter would indicate that the selection method is not effective. In this work we used Km as selective agent, Agrobacterium tumefaciens EHA105 strain and a vector with the nptII gene under the nos promoter and uidA gene under 35S promoter. The response of agroinfected (A) and control (C) explants during the in vitro culture was studied and in both cases in presence or absence of Km in order to assign a differential morphologic response between transformed and non-transformed plants. The characteristics analyzed were: height, colour/aspect of the plantlets, in vitro rooting and in vitro bud-flower development....
Tipo: Journal article
Palavras-chave: Genetic transformation; Kanamycin; Selection; Sunflower.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300027

Development of a Brazilian maize core collection
Provedor de dados: 74
Autores: Coimbra,Ronaldo R.; Miranda,Glauco V.; Cruz,Cosme D.; Silva,Derly J.H.; Vilela,Ramiro A.
The aim of this study was to evaluate methods for developing a Brazilian maize core collection. For an initial survey of the active collection, passport information, as well as characterization and evaluation of accessions, were taken into consideration, these then being divided according to geographic region and kernel-type. Multiple sampling methods were evaluated. The strategy of constant sampling generated extensive alterations in extract accession frequency. The multivariate strategy with dispersion graphs and principal components associated with the Tocher method was considered efficient for identifying the most divergent genotypes. The multivariate strategy generated greater alterations in the variance of traits. The average number of traits...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germplasm collection; Zea mays; Breeding; Landraces; Selection.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300017

Dominance, epistasis, heritabilities and expected genetic gains
Provedor de dados: 74
Autores: Viana,José Marcelo Soriano.
Although epistasis is common in gene systems that determine quantitative traits, it is usually not possible to estimate the epistatic components of genotypic variance because experiments in breeding programs include only one type of progeny. As the study of this phenomenon is complex, there is a lack of theoretical knowledge on the contribution of the epistatic variances when predicting gains from selection and on the bias in estimating genetic parameters when fitting the additive-dominant model. The objective of this paper is to discuss these aspects. Regarding a non-inbred population, the genetic value due to dominance and the epistatic components of the genotypic value are not indicators of the number of favorable genes present in an individual. Thus,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breeding; Genetic parameters; Gene interaction; Selection.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100012

Genetic variation in a closed line of the white shrimp Litopenaeus vannamei (Penaeidae)
Provedor de dados: 74
Autores: Luvesuto,Eloize; Freitas,Patrícia Domingues de; Galetti Junior,Pedro Manoel.
The culture of the marine shrimp Litopenaeus vannamei has recently boosted the Brazilian shrimp industry. However, it is well known that selection methods based solely on phenotypic characteristics, a reduced number of breeders and the practice of inbreeding may promote a significant raise in the genetic similarity of the captive populations, leading to greater disease susceptibility and impairing both the growth and final size of the shrimps. We used four microsatellite loci to investigate genetic variation in three generations (F5, F6 and F7) of a closed and reared L. vannamei lineage. Although an accentuated heterozygosis deficit was detected, we also observed that the captive propagation of this lineage did not lead to a significant loss of genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broodstocks; Inbreeding; Penaeids; Selection.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600021

Rapid sequence divergence rates in the 5 prime regulatory regions of young Drosophila melanogaster duplicate gene pairs
Provedor de dados: 74
Autores: Kohn,Michael H.
While it remains a matter of some debate, rapid sequence evolution of the coding sequences of duplicate genes is characteristic for early phases past duplication, but long established duplicates generally evolve under constraint, much like the rest of the coding genome. As for coding sequences, it may be possible to infer evolutionary rate, selection, and constraint via contrasts between duplicate gene divergence in the 5 prime regions and in the corresponding synonymous site divergence in the coding regions. Finding elevated rates for the 5 prime regions of duplicated genes, in addition to the coding regions, would enable statements regarding the early processes of duplicate gene evolution. Here, 1 kb of each of the 5 prime regulatory regions of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gene duplication; Gene expression; Selection; Promoter evolution.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000300028

Breeding Calabrian pepper lines for Brazilian agriculture from sui generis introduction of germplasm
Provedor de dados: 75
Autores: Ribeiro,Claudia SC; Soares,Renato S; Gomes,Lucas M; Coelho,Lucas GF; Reifschneider,Francisco JB.
ABSTRACT Few Calabrian pepper cultivars (C. annuum and C. baccatum) are available in the Brazilian market, and among these, only BRS Mari (C. baccatum) was developed in Brazil, by Embrapa. This work aimed to report on the introduction of germplasm in a sui generis way and the initial results of Calabrian pepper breeding at Embrapa Vegetables. Original population was obtained through separation of seeds found in dehydrated Calabrian pepper flakes imported from India. The breeding method was individual selection of plants with progeny test and three generations of selection and self-pollination were advanced. Ten plants were obtained from the original seeds, which were self-pollinated and originated 87 S1 plants. Out of these, seeds of 73 S1 plants were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; Selection; Pepper flakes; Pepperoncino.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000200195

Reaction of families and lines of melon to powdery mildew
Provedor de dados: 75
Autores: Sales Júnior,Rui; Nunes,Glauber HS; Michereff,Sami J; Pereira,Elaíne WL; Guimarães,Izabel M.
Powdery mildew, caused by Podosphaera xanthii, is an important disease of melon in the Brazilian Northeast. The objective of this work was to evaluate the reaction of families, lines and cultivars of melon to P. xanthii. Two experiments in simple lattice were carried out under field conditions in the municipalities of Mossoró and Baraúna to evaluate 144 families. In a greenhouse, an experiment was carried out in a completely randomized design to evaluate 19 lines and the cultivars Yellow Queen, Chilton and Hy Mark. Disease was assessed by a severity scale. There was genetic variability among families. The families 4, 5, 11, 14, 18, 23, 33, 42, 101, 112 and 140 were identified in both sites as resistant. The lines LOF-027, LOF-105, LPS-124, MEL-008 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo; Podosphaera xanthii; Powdery mildew; Resistance; Selection.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000300021

Yield, frying quality, plant vigor, and maturity of potato clones
Provedor de dados: 75
Autores: Silva,Giovani Olegario da; Pereira,Arione da S; Carvalho,Agnaldo DF; Azevedo,Fernanda Q.
ABSTRACT The objective of this research was to evaluate advanced potato clones for tuber yield, frying quality, plant vigor, and maturity, grown from minituber seeds, and to assess correlations between these traits. Eight advanced potato clones of Embrapa Potato Breeding Program (F11-09-03, F05-11-03, F54-11-06, F141-11-01, C2718-12-09, C2718-24-09, C2743-09-09, and CL308) and three commercial cultivars (Agata, Asterix and BRSIPR Bel) were evaluated. Experiments were carried out in autumn 2017, in Canoinhas-SC and Pelotas-RS. A randomized complete block design with four replicates was used. We used tuber seeds type IV (minibubers). We evaluated plant vigor, maturity, yield and number of marketable tubers, yield and number of total tubers, average tuber...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Breeding; Selection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000100095

Genetic parameters estimation in King palm through a mixed mating system model
Provedor de dados: 75
Autores: Bovi,Marilene L. A.; Resende,Marcos Deon V. de; Spiering,Sandra H.
Overestimation of the genetic parameters is common in palms due to the occurrence of geitonogamy and the absence of self-incompatibility mechanisms. Data from nursery grown Archontophoenix palms were utilized, assuming a mixed mating system including random cross-pollination and selfing at different rates. The objective was to show the importance of knowing the mating system predominant and define breeding strategies for that genus. Twenty-four King palm half sib families were evaluated at nursery conditions using a randomised complete block design, with nine replications and eleven plants per plot. Ten months after sowing, traits such as diameter, height, number of green leaves and length of the leaf sheath of the second leaf, were individually measured....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Archontophoenix; Alexander palm; Bangalow palm; Heritability; Selection; Growth traits.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362003000100020

Fisiologia e manuseio pos-colheita de cenoura.
Provedor de dados: 14
Autores: LANA, M. M.; VIEIRA, J. V.
bitstream/item/107348/1/CNPH-DOCUMENTOS-21-FISIOLOGIA-E-MANUSEIO-POS-COLHEITA-DE-CENOURA-FL-07831.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Fisiologia pos-colheita; Manipulacao; Classificao; Chalaropsis; Rhyzopus; Carrot; Postharvest; Handling; Quality; Harvest; Selection; Diseases; Fungus.; Armazenamento; Cenoura; Colheita; Daucus Carota; Embalagem; Doença; Fungo; Lavagem; Pós-Colheita; Sclerotium Rolfsii; Seleção; Qualidade; Transporte.; Alternaria radicina; Erwinia; Geotrichum; Thielaviopsis; Pseudomonas; Rhizoctonia; Sclerotinia; Classification; Cleaning; Packaging; Postharvest physiology; Storage; Transportation; Washing.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/768857

Seleção e manejo de espécies florestais para fins energéticos na região de Iranduba - AM.
Provedor de dados: 14
Autores: AZEVEDO, C. P. de; LIMA, R. M. B. de; NEVES, E. J. M.
Selecao de especies nativas e/ou exoticas com potencial para produzir lenha e derivados, e estudar tecnicas de manejo adequadas para a implantacao de sistemas de producao de lenha em plantios ordenados, por meio de testes de 12 especies (Acacia angustisima, A. auriculiformes, A. mangium, Albizia lebeck, Calliandra houstiniana, C. callothyrsus, Gmelina arborea, Inga edulis, Leucaena leucocephala, Ormosia sp., Piranhea trifoliata, Tachigalia sp.). Quanto ao crescimento em altura e biomassa, A. auriculiformes, A. mangium e G. arborea tiveram medias estatisticamente iguais e superiores as demais; I. edulis tambem apresentou crescimento satisfatorio. Em relacao ao crescimento diametrico, as especies apresentaram comportamento semente ao desempenho em altura,...
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Acacia angustissima; Acacia auriculiformes; Albizia lebeck; Calliandra callothyrsus; Calliandra houstiniana; Leucena; Tento acai; Piranhea trifoliata; Piranheira; Tachigalia; Taxi vermelho; Brasil; Amazonas; Manaus; Iranduba; Selection; Management.; Acácia; Ingá Edulis; Gmelina Arbórea; Essência Florestal; Espécie; Gmelina; Ingá; Leucaena Leucocephala; Manejo; Seleção.; Albizia; Acacia mangium; Ormosia; Forest trees.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/666482

Metodologia utilizada na construção de tabelas de volume.
Provedor de dados: 14
Autores: SILVA, J. N. M.
bitstream/item/58734/1/CPATU-Doc50.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Análise de regressão; Condicionante de regressão; Teste de paralelismo; Teste de coincidência; Análise de resíduo; Tropical forest; Tree; Selection; Regresion analysis; Assumption for regression; Paralelism test; Coincidence test; Residual analysis.; Árvore; Floresta Tropical; Seleção.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381195

Protocolo de tecnologia: selecao para resistencia a doencas em hortalicas. 4. Tomateiro - Murcha-de-verticilio (Verticillium dahliae e V. albo-atrum).
Provedor de dados: 14
Autores: SANTOS, J. R. M. dos.
bitstream/CNPH-2009/18795/1/cot_11_4.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Diseases; Selection; Resistance; Fungus.; Doença; Fungo; Lycopersicon Esculentum; Seleção; Resistência; Tomate; Verticillium Dahliae.; Verticillium albo-atrum; Tomatoes.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/767614

Implantação de campos de matrizes de cajueiro.
Provedor de dados: 14
Autores: MORAES, E. da C.; ALBUQUERQUE, F. C. de; CORAL, R. P. da S. P.
bitstream/item/114589/1/MATRIZES-CAJUEIRO.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Desenvolvimento; Cashew-nut; Selection; Development; Fruit.; Caju; Fruto; Fruta; Melhoramento; Peso; Seleção.; Breeding; Weight.
Ano: 1974
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376098

Cafeeiro.
Provedor de dados: 14
Autores: OLIVEIRA, R. P. de.
bitstream/item/61710/1/Belem-RecBas6.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivo; Rodovia Transamazônica; Altamira; Itaituba; Pará; Brasil; Coffee; Cultivation; Fertilizer; Seed; Selection; Cultting.; Adubação; Coffea Arábica; Café; Muda; Semente.; Seleção; Amazonia.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381229

Protocolo de tecnologia: selecao para resistencia a doencas em hortalicas. 1. Etapas para selecao de fontes de resistencia a doencas.
Provedor de dados: 14
Autores: SANTOS, J. R. M. dos.
bitstream/CNPH-2009/18792/1/cot_11_1.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Heranca; Resistance; Diseases; Selection; Genetic resistantce; Inoculation; Inheritance.; Doença; Hortaliça; Inoculação; Resistência; Resistência Genética; Seleção.; Vegetables.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/767609

Introdução e seleção do milho centralmex no Nordeste do Brasil.
Provedor de dados: 14
Autores: SANTOS, M. X. dos; TIMOTEO SOBRINHO, A.; QUEIROZ, M. A. de; MELO, J. N. de; NASPOLINI FILHO, V.
A introdução da cultivar Centralmex no Nordeste foi efetuada em 1973, para início de um programa de melhoramento para a região. A metodologia adotada no decorrer do processo seletivo foi a seleção massal estratificada. Os principais atributos agronômicos considerados foram coloração dos grãos e produção, realizando-se, também, a seleção para redução do porte da planta, bom empalhamento e sanidade das espigas. Após oito ciclos de seleção, constatou-se uma modificação acentuada na coloração dos grãos, passando de amarelo-esbranquicado para amarelo-ouro. Nos anos em que foi testado em ensaios de produção, o meterial mostrou produtividades médias superiores ou equivalentes a hibridos comerciais oriundos do Sul do Pais. Os ganhos relativos apresentados...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Variedade Centralmex; Estratificação; Brasil; Nordeste; Variety; Selection; Stratified; Northeast; Cultivo.; Milho; Seleção; Zea Mays.; Corn; Brazil.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133173

Comportamento de cultivares e hibridos de coqueiro-anao no Distrito Federal.
Provedor de dados: 14
Autores: RAMOS, V. H. V.; PINTO, A. C. de Q.; ARAGAO, W. M.; JUNQUEIRA, N. T. V.; LOBATO, E.; OLIVEIRA, M. A. S.
bitstream/CPAC-2009/24602/1/bolpd_28.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Cocus nucifera; Distrito Federal; Brasil; Selection; Cuttings; Hibrids.; Coco; Hibrido; Muda; Seleção; Sistema de Produção; Variedade; Viveiro.; Brazil; Coconuts; Farming systems; Plant nurseries; Varieties.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/556845

Correlações fenotípicas entre caracteres morfológicos e de produção de palmito em açaizeiros.
Provedor de dados: 14
Autores: OLIVEIRA, M. do S. P. de; MULLER, A. A.
bitstream/item/34411/1/ORIENTAL-BP7.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pará; Brasil; Selection; Genetic parameters; Palm heart.; Açaí; Euterpe Oleracea; Fruta; Parâmetro Genético; Palmito; Seleção.; Amazonia; Fruits.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377446

Registro de 25 acessos selecionados de Panicum maximum.
Provedor de dados: 14
Autores: SAVIDAN, Y. H.; JANK, L.; COSTA, J. C. G.
bitstream/item/104715/1/Registro-de-25-acesso.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Panicum maximun; Descrição; Selection; Plant; Gramineous; Register; Description.; Forrageira Tropical; Gramínea; Planta; Seleção.; Registro.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/322481

Seleção para correção de prepúcio e ausência de prolapso em touros de corte.
Provedor de dados: 14
Autores: TORRES JUNIOR, R. A. de A.; BIGNARDI, A. B.; SILVA, L. O. C. da.
O grande uso de touros para monta natural em pastagens tomadas por invasoras predispõe animais com prepúcio longo e com tendência a expor a membrana deste a lesões que podem causar até a perda permanente do reprodutor. Essas características são mais comumns nas raças zebuínas e nas britânicas mochas e nos compostos provenientes de combinações dessa raça. Dentre as formas de avaliação dessa característica destaca-se o uso de escores visuais de umbigo/prepúcio a partir de uma referência gráfica fixa que permite uma avaliação de toda a população e disponibiliza uma maior quantidade de informação. A herdabilidade dessa característica é em torno de 0,2, o que torna necessária uma avaliação dos animais pela progênie para conhecer melhor o seu valor como produtor...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Selection; Genetic parameters.; Bovino; Melhoramento Genético Animal; Parâmetro Genético; Seleção; Reprodução; Touro.; Animal breeding; Cattle; Bulls; Reproduction.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325752

PAGIS - um software para análise genética e índice de seleção em experimentos florestais.
Provedor de dados: 14
Autores: OLIVEIRA, E. B. de; RESENDE, M. D. V. de; HIGA, A. R.; OAIDA, G. R. P.
bitstream/item/162214/1/Doc-24.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: PAGIS; Software; Selection; Informatics; Melhoramento genético.; Genética; Informática; Seleção.; Breeding methods.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/290748

Influencia de sete porta-enxertos mono e poliembrionicos sobre quatro cultivares de mangueira no cerrado de Brasilia-DF.
Provedor de dados: 14
Autores: VARGAS RAMOS, V. H.; PINTO, A. C. Q.; JUNQUEIRA, N. T. V.; GOMES, A. C.
bitstream/CPAC-2010/23947/1/bolpd-20.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Porta-enxerto; Ananicante; Selection; Genetica e melhoramento vegetal: Cultivar de cultura perene.; Cerrado; Manga; Mangifera Indica; Melhoramento; Porta Enxerto; Seleção.; Dwarfing; Breeding; Rootstocks.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567101

Ciclo XI de seleção entre e dentro de progênies de meios-irmãos na variedade de milho BR 5028 - São Francisco.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. da S.; SANTOS, M. X. dos.
bitstream/item/91264/1/CPATC-PESQ.-AND.-51-98.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: São Francisco; Melhoramento genético; Maize; Selection; Genetics improvement.; Milho; Seleção; Variedade.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359663

Características de cultivares de milho (Zea mays L.) no estádio verde em ecossistema de várzea do Amazonas.
Provedor de dados: 14
Autores: CARDOSO, M. O.; BARRETO, J. F.; CARNEIRO, A. M. C.; PINTO, E. O. S.
Avaliacao do comportamento de cinco cultivares de milho, entre doce e comum, em ecossistema de varzea do Estado do Amazonas, visando a producao de milho verde. Dentre as cultivadas avaliadas, cv. BR 5110 apresentou o melhor comportamento quanto a producao de espigas verdes para consumo in natura.
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivo; Brasil; Amazonas; Selection; Cultivation; Flood plains.; Milho; Seleção; Variedade; Zea Mays.; Várzea; Varieties.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/666485

Protocolo de tecnologia: selecao para resistencia a doencas em hortalicas. 3. Tomateiro - Murcha-de-fusario (Fusarium oxysporum f.sp. lycopersici).
Provedor de dados: 14
Autores: SANTOS, J. R. M. dos.
bitstream/CNPH-2009/18794/1/cot_11_3.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Diseases; Resistance; Selection; Fungus.; Doença; Fungo; Fusarium Oxysporum Lycopersici; Lycopersicon Esculentum; Resistência; Seleção; Tomate.; Tomatoes.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/767613

Efeito da seleção de cultivares no rendimento dos mandiocais em zonas mandioqueiras do Pará.
Provedor de dados: 14
Autores: ALBUQUERQUE, M. de.
bitstream/item/81881/1/IPEAN-Com16.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivar; Pará; Brasil; Selection; Yield; Variety.; Mandioca; Produtividade; Seleção.; Amazonia; Cassava.
Ano: 1972
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376675

Protocolo de tecnologia: selecao para resistencia a doencas em hortalicas. 6. Tomateiro - Septoriose (Septoria lycopersici).
Provedor de dados: 14
Autores: SANTOS, J. R. M. dos.
bitstream/CNPH-2009/18797/1/cot_11_6.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Diseases; Selection; Resistance; Fungus.; Doença; Fungo; Lycopersicon Esculentum; Resistência; Seleção; Septoria Lycopersici; Tomate.; Tomatoes.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/767616

Programa de seleção para gado de corte: uma proposição.
Provedor de dados: 14
Autores: EUCLIDES FILHO, K.
O instrumento mais simples que o melhorista tem, a sua disposição, para melhoria da produção de gado de corte e a seleção individual. Seleção nada mais e que o processo de escolha de indivíduos que serão pais na próxima geração. Esta escolha pode ser efetuada selecionando-se aqueles indivíduos superiores para a característica de interesse dentro do próprio rebanho, ou ainda, entre indivíduos provenientes de rebanhos diferentes. No primeiro caso, atenção especial deve ser dada no sentido de se evitar os problemas que surgem como resultado do aumento da consanguinidade. O sucesso desta seleção esta na dependência da qualidade e variabilidade genética, permitir, em muitos casos, a utilização de reprodutores melhores do que aqueles produzidos na própria...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Bovino de corte; Programa; Melhoramento genético; Selection; Program.; Seleção.; Breeding.; Beef cattle.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/318187

Response to selection for growth in an interspecific hybrid between Oreochromis mossambicus and O. niloticus in two distinct environments
Provedor de dados: 5
Autores: De Verdal, Hugues; Rosario, Westly; Vandeputte, Marc; Muyalde, Nerafe; Morissens, Pierre; Baroiller, Jean-francois; Chevassus, Bernard.
The development of a saline tolerant tilapia strain able to grow fast is of importance in the Philippines, where 240 000 ha of brackish water ponds are available. To this end, founder hybridization between Oreochromis niloticus (with favorable growth traits) and O. mossambicus (with favorable salinity tolerance traits) was performed and followed by backcrossing with O. mossambicus to develop a strain highly tolerant to saline environments. Genetic selection for growth performance was subsequently conducted. The aim of the present study was to estimate growth performance and survival of the hybrid in two rearing environments following four generations of genetic selection.  A comparison between the hybrid and an internal reference line was performed in two...
Tipo: Text
Palavras-chave: Salinity tolerance; Selection; Hybridization; Genetic gain; Heritability; Survival rate.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00187/29836/28287.pdf

How to genetically increase fillet yield in fish: Relevant genetic parameters and methods to predict genetic gain
Provedor de dados: 5
Autores: Vandeputte, Marc; Fraslin, Clemence; Haffray, Pierrick; Bestin, Anastasia; Allal, Francois; Kocour, Martin; Prchal, Martin; Dupont-nivet, Mathilde.
Fillet yield (i.e. the proportion of edible muscle in a fish) is a key economic trait for species sold as fillets. Its genetic improvement is complicated by several of its characteristics 1) it is a ratio trait, 2) its numerator (fillet weight) and denominator (body weight) are strongly correlated (correlations in the range 0.89-0.99), 3) it offers little phenotypic variation and 4) it cannot be measured on alive breeding candidates. In a former study, we showed that it could be improved by selection, especially with three selection indices, fillet yield, residual fillet weight and a ratio-specific linear index. However, it is well known that the heritability of ratio traits does not permit a reliable prediction of genetic gains. As predictability of...
Tipo: Text
Palavras-chave: Aquaculture; Genetics; Heritability; Selection; Linear index; Residual fillet weight; Selection response; Simulation; Processing yields.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00612/72378/71390.pdf

Contrasting selective patterns across the segmented genome of bluetongue virus in a global reassortment hotspot
Provedor de dados: 5
Autores: Jacquot, Maude; Rao, Pavuluri P.; Yadav, Sarita; Nomikou, Kyriaki; Maan, Sushila; Jyothi, Y. Krishna; Reddy, Narasimha; Putty, Kalyani; Hemadri, Divakar; Singh, Karam P.; Maan, Narender Singh; Hegde, Nagendra R.; Mertens, Peter; Biek, Roman.
For segmented viruses, rapid genomic and phenotypic changes can occur through the process of reassortment, whereby co-infecting strains exchange entire segments creating novel progeny virus genotypes. However, for many viruses with segmented genomes, this process and its effect on transmission dynamics remain poorly understood. Here, we assessed the consequences of reassortment for selection on viral diversity through time using bluetongue virus (BTV), a segmented arbovirus that is the causative agent of a major disease of ruminants. We analysed ninety-two BTV genomes isolated across four decades from India, where BTV diversity, and thus opportunities for reassortment, are among the highest in the world. Our results point to frequent reassortment and...
Tipo: Text
Palavras-chave: Bluetongue virus; Evolution; Reassortment; India; Selection.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00667/77882/80042.pdf

The identification of genes from the oyster Crassostrea gigas that are differentially expressed between progeny exhibiting opposed susceptibility to summer mortality
Provedor de dados: 5
Autores: Huvet, Arnaud; Degremont, Lionel; Labreuche, Yannick; Daniel, Jean-yves; Dubrunfaut, Thomas; Boudry, Pierre; Haure, Joel; Bedier, Edouard; Ropert, Michel; Herpin, Amaury; Cunningham, Charles; Moal, Jeanne; Samain, Jean-francois.
Summer mortality associated with juveniles of the oyster Crassostrea gigas is the result of a complex interaction between the host, pathogens and environment. Divergent selection based on summer survival have been applied to produce families with resistant and susceptible progeny. Here, we describe the use of suppression subtractive hybridization to generate 150 clones that were differentially regulated between resistant and susceptible F2 progeny. The nucleotide sequence of these 150 clones was determined. Among the 25 unique sequences that matched with the products of known genes, those putatively implicated in energy generation (12%) and immune function (16%), systems suspected to be implicated in summer mortality, were extended and analyzed by real...
Tipo: Text
Palavras-chave: Selection; Gene; Genetic; Summer mortality; Crassostrea gigas; Pacific oysters.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3447.pdf

Les apports de la génétique dans la filière ostréicole française
Provedor de dados: 5
Autores: Lapegue, Sylvie; Renault, Tristan.
The most known and certainly the most important contribution of genetics to the oyster indus try is the development of the triploid cupped oyster. Released for the first time in the 1980s, the triploid oyster has triplets of  chromosomes instead of pairs. Currently, triploid oysters are obtained by crossing diploid and tetraploid oysters. These oysters are characterized by a near lack of milt in summer, which makes them generally popular with consumers, and by a faster growth, allowing a shorter production cycle. In parallel, the exploitation of natural resistance in the diversity of French oysters has been considered to improve the health of farmed populations which is a  major challenge for the sustainability of aquaculture farms. Currently, the...
Tipo: Text
Palavras-chave: Huître creuse; Triploïdie; Sélection; Maladies; Ostréiculture; Cupped oyster; Triploidy; Selection; Disease; Shellfish farming.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00498/60931/64326.pdf

Genetic improvement of common carp (Cyprinus carpio L.)
Provedor de dados: 5
Autores: Vandeputte, Marc.
Common carp was the first domesticated fish species and is now a major species in worldwide aquaculture. Although research has generated a considerable body of knowledge about its genetics, genetic improvement programmes are virtually non-existent in this species and only crossbreeding is used in practice. The main reasons are the inefficiency of methods usually effective in other aquaculture species (monosexing, triploidy), and the bad image of selective breeding which is difficult to implement in ponds, and for which reliable genetic parameters were missing until recently. These parameters are now becoming available through the use of parentage assignment with microsatellite markers. However, the question of selective breeding for growth remains far from...
Tipo: Text
Palavras-chave: Selection; Population genetics; Cyprinus carpio; Breeding; Aquaculture.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6563.pdf

Genetic structure of the common sole (Solea solea) in the Bay of Biscay: Nurseries as units of selection?
Provedor de dados: 5
Autores: Guinand, B; Rolland, Jean-luc; Bonhomme, Francois.
Coastal and estuarine areas in the Bay of Biscay are essential nursery habitats for sole (Solea solea). Using three intronic markers, we investigated patterns of genetic differentiation among cohorts of juveniles (0+, 1+, sub-adults) inhabiting four major nurseries in the Vilaine and Loire river estuaries, the Pertuis d' Antioche strait, and the Gironde estuary. Genetic differentiation was not significant for the age 0- and 1-groups, but was among sub-adult samples (theta(WC) = 0.017; P = 0.031). Hierarchical analyses of genotypic frequencies by nested multivariate ANOVA using redundancy analysis indicated that northern nurseries of Loire and Vilaine rivers had different patterns of genotypic variation with age than southern nurseries of the Pertuis d'...
Tipo: Text
Palavras-chave: Selection; Genetic drift; EPIC PCR; Population genetics; Coastal nurseries; Juveniles; Flatfish.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4299.pdf

Single or dual experimental infections with Vibrio aestuarianus and OsHV-1 in diploid and triploid Crassostrea gigas at the spat, juvenile and adult stages
Provedor de dados: 5
Autores: Azema, Patrick; Travers, Marie-agnes; Benabdelmouna, Abdellah; Degremont, Lionel.
French production of the Pacific cupped oyster, Crassostrea gigas, is currently threatened by two pathogens, OsHV-1 and V. aestuarianus. While oysters selected for their higher resistance to OsHV-1 are now available for the industry, the impact of V. aestuarianus on such oysters is unknown, especially for triploids. In addition, experimental infection has used the virus or the bacteria alone, but there have been no investigations of dual exposure to these pathogens. This study is the first report of single or dual exposure in spat (Spat1 and Spat2), juvenile and adult naïve oysters. For each of the two stocks evaluated, unselected oysters and oysters selected for their higher resistance to OsHV-1 infection were tested, as well as their triploid siblings of...
Tipo: Text
Palavras-chave: Vibrio aestuarianus; OsHV-1; Dual exposure; Ploidy; Selection; Crassostrea gigas.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00347/45835/45918.pdf

Comparative proteomics reveals proteins impacted by nitrogen deprivation in wild-type and high lipid-accumulating mutant strains of Tisochrysis lutea
Provedor de dados: 5
Autores: Garnier, Matthieu; Carrier, Gregory; Rogniaux, Helene; Nicolau, Elodie; Bougaran, Gael; Saint-jean, Bruno; Cadoret, Jean-paul.
Understanding microalgal lipid accumulation under nitrogen starvation is of major interest for biomass feedstock, food and biofuel production. Using a domesticated oleaginous algae Tisochrysis lutea, we performed the first comparative proteomic analysis on the wild type strain and a selected lipid over-accumulating mutant. 2-DE analysis was made on these strains cultured in two metabolic conditions, with and without nitrogen deprivation, which revealed significant differences in proteomes according to both strain and nitrogen availability. Mass spectrometry allowed us to identify 37 proteins that were differentially expressed between the two strains, and 17 proteins regulated by nitrogen starvation concomitantly with lipid accumulation. The proteins...
Tipo: Text
Palavras-chave: Microalgae; Biotechnology; Lipid; Nitrogen; Proteomic; Selection.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00179/29012/27470.pdf

Genetical improvement of marine fish and shellfish : a french perspective
Provedor de dados: 5
Autores: Boudry, Pierre; Chatain, Beatrice; Naciri-graven, Yamama; Lemaire, Christophe; Gerard, Andre.
In France, marine fish and shellfish farming is based mainly on the breeding of wild species, whose natural populations are traditionally exploited. Research programs are conducted by IFREMER, in co-operation with INRA and Universities. French research programs for the genetical improvement of marine fish and shellfish concern primarily seabass (Dicentrarchus labrax) and oysters (Ostrea edulis and Crassostrea gigas). The following programs are developed:  •The knowledge of wild and farmed populations. The most recent prodjects involve the highly variable microsatellite markers. Seven markers are presently available for seabass and the work is now initiated on turbot (Scophthalmus maximus). In molluscs, microsatellite markers have been developed for the...
Tipo: Text
Palavras-chave: Selection; Triploid; Shellfish; Fish; Genetic.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/acte-3206.pdf

Is the Portuguese oyster Crassostrea angulata in Southern Europe endangered by the expansion of the Pacific oyster C. gigas?
Provedor de dados: 5
Autores: Batista, Frederico; Boudry, Pierre; Lapegue, Sylvie; Heurtebise, Serge; Monteiro, C. C.
The Portuguese oyster, Crassostrea angulata, was introduced from Portugal to the French Atlantic Coast in the 1860s. C. angulata quickly settled and expanded and leaded to the development of a new aquacultural industry in France. In the late 1960s, mortality associated with the detection of an iridovirus, led to the wipe out of C. angulata from French Atlantic waters and to the massive introduction of C. gigas to sustain production. In Southern Europe, similar symptoms were also observed in natural stocks of C. angulata from Sado River (Portugal) and from the area of Cadiz (Spain). Nowadays, only very few «pure» populations of C. angulata remain in southern Europe. These populations are potentially endangered by the current expansion of C. gigas...
Tipo: Text
Palavras-chave: Selection; Hybridization; Settlement pattern; Population genetic; Genetic; Oysters; Crassostrea angulata; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3310.pdf

Early life behavioural differences in wild caught and domesticated sea bass (Dicentrarchus labrax)
Provedor de dados: 5
Autores: Benhaim, David; Pean, Samuel; Lucas, Gael; Blanc, Nancy; Chatain, Beatrice; Begout, Marie-laure.
Behavioural studies comparing hatchery and wild-caught fish are useful to improve selection for aquaculture and restocking programmes. We examined swimming behaviour characteristics in wild captured and domesticated sea bass juveniles before and after eliciting a startle response at 8 different ages and always on naive individuals. We specifically investigated whether domestication impacts juvenile sea bass behaviour and whether the first months of captivity induce behavioural modifications in wild juveniles. An apparatus was designed to mimic a predator attack by presenting a sudden visual and mechanical stimuli simultaneously in 8 arenas where single individuals were placed and video recorded. The reactivity response was evaluated and different swimming...
Tipo: Text
Palavras-chave: Domestication; Swimming activity; Restocking; Selection; Coping styles.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00102/21363/19403.pdf

Is avoiding full sib matings really worthwhile in a breeding program?
Provedor de dados: 5
Autores: Dupont-nivet, Mathilde; Vandeputte, Marc.
Stochastic simulations were used to compare genetic progress and inbreeding depending on whether full sib matings were allowed or not when applying individual selection. Fifteen selection cycles were considered, using a single pair mating design. Two levels of heritability (h(2)) were studied (0.1; 0.5) as well as four different proportions of selected animals (2, 5, 10 and 20%), four population sizes (1000, 2,000, 4,000 and 10,000 candidates) and two levels of inbreeding depression (0 and 5% decrease of phenotype for 10% increase in inbreeding). Fifty replicates were generated for each set of parameters. The simulations revealed that avoiding full sib matings became less and less relevant as population size and proportion of selected animals increased and...
Tipo: Text
Palavras-chave: Selection; Sib mating; Inbreeding; Genetic variability; Stochastic simulations; Fish.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14587/11952.pdf

Summer mortality in juvenile cupped oysters : response to selection in the field and in laboratory
Provedor de dados: 5
Autores: Degremont, Lionel; Bedier, Edouard; Soletchnik, Patrick; Ropert, Michel; Samain, Jean-francois; Boudry, Pierre.
The French project "Morest", coordinated by IFREMER, aims to a better understanding of the causes of summer mortalities in juvenile oysters by a multidisciplinary approach. Within this program, a first generation (G1) was bred in 2001 to assess to what extent genetic variability exists for this trait in French populations. 17 half-sib families (HSF) including 44 full-sib families (FSF) were obtained in the G1, and each FSF was reared in three sites along the French coast during the summer period. Significant differences in survival were observed among HSF, clearly indicating a genetic basis for survival. Estimation of heritability for survival was very high: 0.81 &amp;#61617; 0.29. In 2002, 3 "good" HSF and 3 "bad" HSF were selected on their survival...
Tipo: Text
Palavras-chave: Selection; Genetic; Mortalities; Crassostrea gigas; Oyster.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-3439.pdf

How to genetically increase fillet yield in fish: New insights from simulations based on field data
Provedor de dados: 5
Autores: Fraslin, Clemence; Dupont-nivet, Mathilde; Haffray, Pierrick; Bestin, Anastasia; Vandeputte, Marc.
Fillet yield (i.e. the proportion of edible flesh from a given amount of fish) is a trait of high economic interest for species sold as fillets. Improving it by selective breeding is not an easy task, as it is a ratio trait, which causes mathematical difficulties. It is moreover a specific ratio where numerator (fillet weight) and denominator (body weight) are very strongly correlated (genetic and phenotypic correlations in the range 0.89–0.99). This led some authors to conclude that they have the same genetic and phenotypic basis, precluding selection for improved fillet yield. In this study, we propose to study fillet yield as a component of two traits, fillet weight and waste weight (waste weight = body weight-fillet weight, so the sum of head, bones,...
Tipo: Text
Palavras-chave: Aquaculture; Genetics; Heritability; Selection; Processing yields.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52599/53430.pdf

Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria
Provedor de dados: 5
Autores: Grima, Laure; Quillet, E; Boujard, Thierry; Robert Granie, C; Chatain, Beatrice; Mambrini, M.
Little is known about the genetic basis of residual feed intake (RFI) variation in fish, since this trait is highly sensitive to environmental influences, and feed intake of individuals is difficult to measure accurately. The purpose of this work was (i) to assess the genetic variability of RFI estimated by an X-ray technique and (ii) to develop predictive criteria for RFI. Two predictive criteria were tested: loss of body weight during feed deprivation and compensatory growth during re-feeding. Ten heterozygous rainbow trout clones were used. Individual intake and body weight were measured three times at three-week intervals. Then, individual body weight was recorded after two cycles of a three-week feed deprivation followed by a three-week re-feeding....
Tipo: Text
Palavras-chave: Selection; Indirect criteria; Residual feed intake; Clone; Rainbow trout.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4777.pdf

Déclin de la taille-aux-âges des sardines (Sardina pilchardus) : diminution de la croissance et/ou disparition sélective des individus à croissance rapide
Provedor de dados: 5
Autores: Gentil, Claire.
In many exploited species, we see a decrease of size-at-ages. Two main hypotheses have been proposed to explain this decline: a decline in growth and the selective mortality of the individuals with fast growth both being due to environmental changes or/and to fishing. The sardine Sardina pilchardus of the Bay of Biscay is a good model for the study of this phenomenon because of its high sensitivity to the environmental variations and it sustains two large French and Spanish fisheries. The aim of this study is to measure the changes in the growth of sardines, by the reading of otoliths, and to understand mechanisms involved in this process. The main stages of this study are described in this report: extraction of otoliths during PELGAS, otoliths...
Tipo: Text
Palavras-chave: Sardina pilchardus; Golfe de Gascogne; Otolithes; Croissance; Mortalité; Sélection; Sardina pilchardus; Bay of Biscay; Otoliths; Growth; Mortality; Selection.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00459/57038/58942.pdf

Temperature effect on survival, growth, and triacylglycerol content during the early ontogeny of Mytilus edulis and M. trossulus
Provedor de dados: 5
Autores: Rayssac, Nathalie; Pernet, Fabrice; Lacasse, Olivia; Tremblay, Rejean.
Temperature is a major factor contributing to the biogeography of intertidal poikilotherms. The population dynamics of intertidal invertebrates like mussels are strongly dependent on larval supply and larval mortality. Unlike adults, which are resistant to fluctuating environmental conditions, larvae are highly sensitive to the physicochemical conditions of the pelagic zone. The effects of rearing temperature on larval and post-larval performance of 2 coexisting mussels species, Mytilus edulis and M. trossulus, were examined in this study. In the first experiment, larvae of both species were reared separately at constant temperatures of 10, 17, and 24 degrees C from D-larvae to the dissoconch stage. In the second experiment, pediveligers were reared under...
Tipo: Text
Palavras-chave: Thermal adaptation; Bivalve mollusk; Selection; Biogeography; Lipid; Larval ecology.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13028/10159.pdf

Anti-predator response of Haliotis tuberculata is modified after only one generation of domestication
Provedor de dados: 5
Autores: Roussel, Sabine; Bisch, T; Lachambre, S; Boudry, Pierre; Gervois, Jl; Lambert, Christophe; Huchette, S; Day, R.
Domestication of Haliotis tuberculata has only recently begun. During the process, we expect that behavioural and physiological traits may evolve to become more adapted to their captive environment. These modifications may result from intentional selection of production traits or unconscious and unintentional selection due to conditions experienced in the farm environment. To study this process at the earliest stage, the progeny of 3 different broodstocks obtained from wild parents, selected farmed abalone and randomly sampled farmed abalone, were studied. After rearing for 16 mo in separate tanks, offspring from the 3 progenies were placed together in sea cages at the same density. After 3 yr, behavioural traits were studied, and the immune status after a...
Tipo: Text
Palavras-chave: Predation; Hiding behaviour; Haliotis tuberculata; Domestication; Selection; Captive; Abalone.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59841/62989.pdf

Evidence of response to unintentional selection for faster development and inbreeding depression in Crassostrea gigas larvae
Provedor de dados: 5
Autores: Taris, Nicolas; Batista, F; Boudry, Pierre.
Underlying consequences of domestication and artificial selection still remain largely unexplored in most aquacultured species. For species with a two phase life cycle, including the Pacific oyster Crassostrea gigas, most genetic studies have focused on the post-metamorphosis juvenile and adult stages, but relatively few considered the larval stage. To assess the consequence of hatchery practices on larval characters, especially growth, we performed a phenotypic study on larval progenies derived from crosses between Pacific oysters from natural beds and farmed Pacific oysters selected for desirable production traits such as rapid growth, for over seven generations. A set of three microsatellite loci was used to compare the genetic variability between the...
Tipo: Text
Palavras-chave: Crassostrea gigas; Inbreeding depression; Selection; Domestication; Larval stage.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3848.pdf

Validation in commercial conditions of the response to selection of the European flat oyster Ostrea edulis for resistance to Bonamia ostreae
Provedor de dados: 5
Autores: Bedier, Edouard; Langlade, Aime; Angeri, Stéphane; Brizard, Raphael; Nerlovic, V.; Glize, Philippe; Haffray, Philippe.
Since the outbreaks of the parasitosis with Marteilia refringens and Bonamia ostreae in the last 60's, the French production of the European flat oyster dropped from 20000 mT to less than 1500 mT currently, leaving the French shellfish farming in situation of virtually monoculture of the Pacific cupped oyster Crassostrea gigas. To sustain this traditional culture, Ifremer has developed, at the experimental level, a genetic selection for a better tolerance to Bonamia ostreae which led to an improvement of survivals. The transfer of these results to the business scale requires the control of the reproduction in hatchery and the adaptation of the cycle of production to the constraints of seedlings in deep water as practised in Brittany (France). That's why a...
Tipo: Text
Palavras-chave: Selection; Genetic; Bonamia ostreae; Parasite; Ostrea edulis; Oyster.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3313.pdf

Response to selection for increasing resistance to the spring mortality outbreaks in Mytilus edulis occurring in France since 2014
Provedor de dados: 5
Autores: Degremont, Lionel; Maurouard, Elise; Rabiller, Manuella; Glize, Philippe.
Massive spring mortality outbreaks have been reported in Mytilus spp. in France since 2014. The main areas affected are the Pertuis Charentais Sounds and the coast of the Pays de la Loire, which cultivate mainly M. edulis, and the putative causal agents remain unknown. We report the results of the first generation of mass selection focused on survival and resistance to the spring mortality in M. edulis. Two stocks of mussels were sampled in the Pertuis Charentais Sounds in 2014; one of these went through a spring mortality outbreak and the survivors were used to produce the selected stock, while the second stock was M. edulis considered to be naïve against the putative causal agents of the mortality outbreak and was used to produce the control stock. A...
Tipo: Text
Palavras-chave: Spring mortality; Survival; Mytilus edulis; Heritability; Selection.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61619/65530.pdf

Exploration behaviour and flight response toward a stimulus in three sea bass strains (Dicentrarchus labrax L.)
Provedor de dados: 5
Autores: Millot, Sandie; Begout, Marie-laure; Chatain, Beatrice.
Domestication and selection may affect fish behaviour, sometime as soon as at the first generation of domestication. However, knowledge about how both processes impact on fish spatial exploration and swimming activity still is to be improved. The objective of this experiment was (i) to evaluate spatial exploration behaviour and swimming activities of three sea bass strains having different domestication and selection levels and (ii) to analyse their responses to an acute stress. Sea bass exploration and swimming activities were studied before, during and 40 min after a stimulation (standardized fall of an object). The experimental tank was divided in to four zones, and the time spent, the distance travelled in each zone and the swimming complexity were...
Tipo: Text
Palavras-chave: Thigmotaxis; Risk assessment; Danger avoidance; Swimming activity; Personality; Selection; Domestication.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6458.pdf

Improving feed efficiency in fish using selective breeding: a review
Provedor de dados: 5
Autores: De Verdal, Hugues; Komen, Hans; Quillet, Edwige; Chatain, Beatrice; Allal, Francois; Benzie, John A. H.; Vandeputte, Marc.
Improving feed efficiency (FE) is key to reducing production costs in aquaculture and to achieving sustainability for the aquaculture industry. Feed costs account for 30–70% of total production costs in aquaculture; much work has been done on nutritional and husbandry approaches to improve FE but only a limited amount of research has been devoted to using genetics, despite its potential. This paper reviews past work to improve FE in fish using selective breeding and assess future directions. Direct selection on FE traits requires methods to measure individual feed consumption and estimate FE efficiently and accurately. This is particularly difficult to do in fish because of the environment in which they live. Many of the published studies on FE were found...
Tipo: Text
Palavras-chave: Feed conversion ratio; Feed efficiency; Feed intake; Fish; Genetics; Selection.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52675/53771.pdf

Apport d'un programme de génétique à une filière de production aquacole : l'exemple de l'ostréiculture
Provedor de dados: 5
Autores: Lapegue, Sylvie; Bedier, Edouard; Goyard, Emmanuel; Degremont, Lionel; Baud, Jean-pierre; Gerard, Andre; Goulletquer, Philippe; Boudry, Pierre.
Two oyster species are currently present along the French coasts : the indigenous European flat oyster (Ostrea edulis), and the Pacific cupped oyster (Crassostrea gigas), that has been introduced from Japan since the beginning of the 70ies. The flat oyster successively suffered from two protozoan diseases during the 60ies and its production decreased from 20 000 tons/year by that time to 1 500 tons/year nowadays. Consequently, the oyster production is principally (99%) based upon the Pacific oyster species with approximately 150 000 tons/year among which 90% are grown from the natural spat. However, the hatchery production of this species is developing and was estimated to 400 to 800 millions spat in 2002. Moreover, strengthened relationships between...
Tipo: Text
Palavras-chave: Growth; Selection; Genetic breeding; Genetic; Ostrea edulis; Crassostrea gigas; Oysters; Croissance; Sélection; Amélioration génétique; Génétique; Ostrea edulis; Crassostrea gigas; Huîtres.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2003/acte-3491.pdf

Fecundity, growth rate and survivorship at the interface between two contiguous genetically distinct groups of Semibalanus balanoides
Provedor de dados: 5
Autores: Brind'Amour, Anik; Bourget, Edwin; Tremblay, Rejean.
On the western coast of the Atlantic, according to the literature, 2 distinct groups of Semibalanus balanoides occur with a distinct interface near the Miramichi Estuary, New Brunswick, in the Gulf of St. Lawrence. On each side of this interface, the groups are characterized by clinal variations for MPI (mannose-6-phosphate isomerase) and GPI (glucose-6-phosphate isomerase). The present study was carried out to determine whether selection occurs at this interface, to establish how early in the sessile life period it occurs and to examine the selecting forces involved. Reciprocal transplant experiments of newly settled individuals to both sides of the interface were carried out. No significant differences specifically linked to source or destination were...
Tipo: Text
Palavras-chave: Semibalanus; Genetics; Selection; Fecundity; Growth rate; Survival.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00048/15970/13410.pdf

Impact of intensive larval rearing practices in oyster hatcheries : selective processes and loss of genetic variability (Poster)
Provedor de dados: 5
Autores: Taris, Nicolas; Sauvage, Christopher; Boudry, Pierre.
Early-life history of oysters, like in most marine bivalves, is characterized by high fecundity and low survival rate. In hatcheries, which are ecoming more and more important for the production of juveniles for aquaculture production, rearing conditions are optimised (density, feeding, temperature...), and contrast with those observed in the wild. Additionally, slow growing larvae are culled by sieving.
Tipo: Text
Palavras-chave: Crassostrea gigas; Juvenile; Genetic variability; Selection; Genetic; Hatcheries; Oyster.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3444.pdf

Genetic improvement of fish: Achievements and challenges for tomorrow
Provedor de dados: 5
Autores: Vandeputte, Marc; Baroiller, Jean-francois; Haffray, Pierrick; Quillet, Edwige.
Genetic improvement is a major contributing factor in developing efficient aquaculture, as it is in other forms of animal production. Moreover, as most fish species are only slightly domesticated, the potential gains are very large. Many of the current methods, developed during the XXth century, are classically used in livestock rearing (choice of breeds, crossbreeding, selective breeding). Others are much more specific to aquatic organisms (genetic control of sex, sterilization through triploidization). The spread of selected lines in aquaculture has been effective only since the 1990s, with lines selected essentially on growth and producing some impressive results. Transgenesis, although technically feasible on growth rate, is not used in practice and...
Tipo: Text
Palavras-chave: Selection; Genomics; Fishes; Breeding; Aquaculture.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6564.pdf

Microsatellite-based parentage analysis of factorial crosses in Pacific oyster (Crassostrea gigas) larvae and spat
Provedor de dados: 5
Autores: Taris, Nicolas; Sauvage, Christopher; Ernande, Bruno; Boudry, Pierre.
Several studies have suggested that significant genetic variability might exist for some early developmental traits in the Pacific oyster, C. gigas. However, most studies have examined only limited numbers of families.  More critically, these families were rarely replicated, leading to possible bias due to heterogeneous larval rearing conditions among families. To overcome these potential problems, we used a mixed-family approach with subsequent parentage analysis. A recently developed set of three multiplexed microsatellite markers was used to determine parentage in a complete factorial cross between 12 males and 4 females. Larvae were reared at two different temperatures (20 and 26°C) to provide a contrast resembling wild versus hatchery conditions....
Tipo: Text
Palavras-chave: Selection; Genetic variability; Microsatellites; Crassostrea gigas; Pacific oysters.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3440.pdf

Fairly processing rare and common species in multivariate analysis of ecological series - Application to macrobenthic communities from Algiers harbour
Provedor de dados: 5
Autores: Mante, Claude; Claudet, Joachim; Rebzani Zahaf, C.
Systematic sampling of communities gives rise to large contingency tables summing up possible changes in the assemblages' structure. Such tables are generally analysed by multivariate statistical methods, which are ill-suited for simultaneously analysing rare and common species (Field et al., 1982). In order to separately process species belonging to either of these categories, we propose a statistical method to select common species in a sequence of ecological surveys. It is based on a precise definition of rarity, and depends on a rarity parameter.   In this work, this parameter will be optimised so that the sub-table of common species captures the essential features of the complete table as well as possible. In this way we analysed the spatio-temporal...
Tipo: Text
Palavras-chave: Hellinger distance; Pollution; Algiers harbour; Multivariate analyses; Macrobenthic communities; Selection; Rare species.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/2003/publication-754.pdf

Environmental impacts of genetic improvement of growth rate and feed conversion ratio in fish farming under rearing density and nitrogen output limitations
Provedor de dados: 5
Autores: Besson, M.; Aubin, J.; Komen, H.; Poelman, M.; Quillet, E.; Vandeputte, Marc; Van Arendonk, J. A. M.; De Boer, I. J. M.
Today, fish farming faces an increasing demand in fish products, but also various environmental challenges. Genetic improvement in growth rate and feed conversion ratio is known to be an efficient way to increase production and increase efficiency in fish farming. The environmental consequences of genetic improvement in growth rate and feed conversion ratio, however, are unknown. In this study, we investigated the environmental consequences of genetic improvement in growth rate and feed conversion ratio in an African catfish farm, using Recirculating Aquaculture System (RAS). In RAS, total fish production of the farm is limited by rearing density or by the capacity to treat dissolved nitrogen. To evaluate the environmental consequences of genetic...
Tipo: Text
Palavras-chave: Life cycle assessment; African catfish; Feed efficiency; Recirculating aquaculture system; Selection; Thermal growth coefficient.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00302/41355/40546.pdf

Genetic variation for growth at one and two summers of age in the common carp (Cyprinus carpio L.): Heritability estimates and response to selection
Provedor de dados: 5
Autores: Vandeputte, Marc; Kocour, M; Mauger, S; Rodina, M; Launay, A; Gela, D; Dupont Nivet, M; Hulak, M; Linhart, O.
We estimated the heritability of growth-related traits (weight and length at ages one summer, first spring and two summers) in a synthetic mirror carp strain (HSM) in the Czech Republic. The four generation pedigree was obtained from parentage assignment of three factorial mating designs with microsatellite markers, and included 195 fish without phenotypes (48 G0, 147 G1) and 1321 fish with phenotypes (674 G2, 647 G3). Animal model heritability estimates over generations were in the range 0.21-0.33 for length and in the range 0.31-0.44 for weight. The genetic correlation between length and weight was high (0.97). The correlations between growth measurements in the first and in the second summer of age were moderate to low (0.34-0.67). Divergent selection...
Tipo: Text
Palavras-chave: Quantitative genetics; Performance; Microsatellites; Parentage assignment; Realized heritability; Selection response; Selection; Growth; Heritability; Cyprinus carpio; Common carp.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4076.pdf

Genetic parameters of in-vivo prediction of carcass, head and fillet yields by internal ultrasound and 2D external imagery in large rainbow trout (Oncorhynchus mykiss)
Provedor de dados: 5
Autores: Haffray, Pierrick; Bugeon, Jerome; Rivard, Quentin; Quittet, Benjamin; Puyo, Sophie; Allamelou, Jean Michel; Vandeputte, Marc; Dupont-nivet, Mathilde.
Selection to improve processing yields relies on sib selection, in which live candidates are ranked according to their family breeding value. This approach limits genetic progress, as it only exploits genetic variability between families and not within them. Indirect criteria measured on live candidates could overcome this limitation. The present study (1) proposes a procedure to identify indirect criteria to predict processing yields in rainbow trout (head, carcass and fillet yields), (2) estimates genetic parameters of these indirect criteria, and (3) predicts relative genetic gains in processing yields using full-sib selection or indirect individual selection on those indirect criteria. DNA-pedigreed all-female rainbow trout Oncorhynchus mykiss (n =...
Tipo: Text
Palavras-chave: Salmonids; Heritability; Fillet yield; Selection; Aquaculture; Morphometry.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26847/25249.pdf

Effects of genetic drift and selection at larval stage resulting from hatchery practices in the Pacific oyster (Crassostrea gigas)
Provedor de dados: 5
Autores: Taris, Nicolas; Sauvage, Christopher; Ernande, Bruno; Batista, Frederico; Boudry, Pierre.
Hatchery techniques are now well handled in an increasing number of aquaculture species. However, unintentional effects of domestication often remain poorly documented. In this context, we studied how current hatchery practices may genetically influence larval traits for which significant genetic variation had previously been reported in the Pacific oyster. Two main factors were studied: culling (i.e. discarding the smallest larvae) and rearing temperature (26°C versus 20°C). In parallel, we estimated genetic diversity of broodstock populations sampled in French hatcheries. Finally, we compared larval development and settlement success in the progeny of one of these hatchery broodstock, which had been selected for seven generations, with those of wild...
Tipo: Text
Palavras-chave: Genetic drift; Selection; Genetic; Crassostrea gigas; Oysters; Hatchery techniques.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3362.pdf

Genetic improvement and selection in shellfish : a review based on oyster research and production
Provedor de dados: 5
Autores: Boudry, Pierre; Barre, Marc; Gerard, Andre.
Despite the economic importance of shellfish, genetic improvement has not yet had a great impact on these species. Shellfish farming is traditionally based on wild species whose natural populations are often overexploited and do not fulfill market demand. Up to now, the most effective answer to disease problems or for the improvement of productivity has been the introduction of new species. However, the introduction of new species is constrained by their ecological impact and is also limited by the availability of suitable species. Genetic improvement of local species should therefore be of great importance as a viable alternative for the long term sustainability of the shellfish industry. The different approaches to genetic improvement include...
Tipo: Text
Palavras-chave: Selective breeding; Hybridization; Polyplidy; Introduction; Oysters; Selection; Hybridation; Polyploidie; Introduction; Huitres.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3499.pdf

Impact of intensive larval rearing practices in oyster hatcheries : selective processes and loss of genetic variability (slides)
Provedor de dados: 5
Autores: Taris, Nicolas; Sauvage, Christopher; Boudry, Pierre.
Oysters, like many marine bivalves, are characterized by very high fecundity and low survival rate at early stages of life. Rearing conditions in hatcheries (i.e. density, feeding, temperature...) are different from those observed in the wild. Additionally, slow growing larvae are culled by sieving. As previous studies have shown that genetic variability exists for several early development traits, we aimed to assess if common hatchery rearing practices exert specific selective processes at the larval stage. In order to avoid possible bias and to increase the number of families studied, we used a mixed-family approach with subsequent parentage analysis using a recently developed set of three multiplexed microsatellite markers. We studied the variance in...
Tipo: Text
Palavras-chave: Hatcheries; Selection; Genetic drift; Genetic; Crassotrea gigas; Pacific oysters.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-3483.pdf

Genetic effect of domestication selective pressures on Pacific oyster at larval stage
Provedor de dados: 5
Autores: Taris, Nicolas; Sauvage, Christopher; Ernande, Bruno; Boudry, Pierre.
Among bivalve species, the Pacific oyster, Crassostrea gigas, is the most economically important bivalve production over the world. Today, C. gigas is subject to an important production effort that leads to an intensive artificial selection. Larval stage is relatively unknown, specifically in a domestication context. Genetic consequence of artificial selection is still at a preliminary study. We aimed to tackle the consequence of inconscient domestication on the variance reproductive success focusing on larval stage, keystone of the life cycle. We studied two kinds of specific selective processes that common hatchery rearing practices exert : the effect of discarding the smallest larvae on genetic diversity and the artificial environment rearing effect via...
Tipo: Text
Palavras-chave: Selection; Genetic correlations; Genetic variability; Genetic; Domestication selective; Crassostrea gigas; Pacific oysters.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3441.pdf

Domestication, sélection et comportement du bar: variabilité des aptitudes comportementales et de la tolérance au stress de groupes génétiquement distincts de bar, Dicentrarchus labrax
Provedor de dados: 5
Autores: Millot, Sandie.
The culture of aquatic species has grown much more rapidly in recent years than that of terrestrial species. Consequently, aquatic livestock welfare is a growing concern for society. However, unlike the many studies of terrestrial animal welfare, few scientific data exist concerning fish welfare. It is generally recognized that the aquaculture environment exposes fish to many repeated stress factors which affect their health, growth, reproductive performance and feeding behaviour. Even if stress responses do not highlight all welfare disturbances, it is generally admitted that they reveal a poor welfare. Among the solutions investigated to reduce fish stress, domestication and selection appear to be the favoured approaches. However, selection has generally...
Tipo: Text
Palavras-chave: Personality; Physiological status; Growth; Swimming behaviour; Feeding behaviour; Stress tolerance; Adaptation; Welfare; Chronic stress; Acute stress; Selection; Domestication; Dicentrarchus labrax; Personnalité; Statut physiologique; Croissance; Comportement natatoire; Comportement alimentaire; Tolérance au stress; Adaptation; Bien être; Stress chronique; Stress aigu; Sélection; Domestication; Dicentrarchus labrax.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-6272.pdf

Genetic improvement for disease resistance in oysters: a review
Provedor de dados: 5
Autores: Degremont, Lionel; Garcia, Celine; Allen, Standish K., Jr.
Oyster species suffer from numerous disease outbreaks, often causing high mortality. Because the environment cannot be controlled, genetic improvement for disease resistance to pathogens is an attractive option to reduce their impact on oyster production. We review the literature on selective breeding programs for disease resistance in oyster species, and the impact of triploidy on such resistance. Significant response to selection to improve disease resistance was observed in all studies after two to four generations of selection for Haplosporidium nelsoni and Roseovarius crassostrea in Crassostrea virginica, OsHV-1 in Crassostrea gigas, and Martelia sydneyi in Saccostrea glomerata. Clearly, resistance in these cases was heritable, but most of the studies...
Tipo: Text
Palavras-chave: Disease resistance; Oyster; Selection; Pathogen; Genetic; Mortality.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00269/38049/36139.pdf

Response to divergent selection for resistance to summer mortality in Pacific oyster spat : genetic parameters and correlated responses with subsequent survival and growth
Provedor de dados: 5
Autores: Boudry, Pierre; Bedier, Edouard; Ernande, Bruno; Degremont, Lionel.
The multidisciplinary program "MOREST" aims to improve our understanding of causes of summer mortality in Crassostrea gigas juveniles in France and to reduce its impact on oyster production. As part of this program, four successive generations of families were bred between 2001 and 2005 in our research hatchery in La Tremblade. Survival and growth were recorded in the field in three sites along the French coast (Ronce, Rivière d'Auray and Baie des Veys). The first generation (44 full-sib families nested within 17 half-sib families) was tested during summer 2001 to assess to what extent genetic variability exists for spat survival.  An important genetic basis was found (estimated narrow-sense heritability among sites = 0.83 ± 0.40). In contrast, lower...
Tipo: Text
Palavras-chave: Survival; Growth; Genetic parameters; Summer mortality; Selection; Genetic; Crassostrea gigas; Pacific oysters.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3458.pdf

Biochemical Profile of Serbian Youth National Soccer Teams
Provedor de dados: 77
Autores: Joksimovic,Aleksandar; Jezdimirovic,Marko; Smajic,Miroslav; Stankovic,Daniel; Popovic,Stevo; Tomic,Bogdan.
The aim of the present study was to determine biochemical profile of youth national soccer teams and to compare the values of nine biochemical parameters between three Serbian youth national teams (under 14, 15 and 16 years old), as well as between soccer players and non-athletes. Eighty young soccer players and thirty non-athletes participated in the study. Nine biochemical parameters (glucose, cholesterol, triglycerides, urea, creatinine, total bilirubin, AST (SGOT), ALT (SGPT), iron) were measured. In order to determine the significance of differences between the groups on a multivariate level a multivariate analysis of variance (MANOVA) was administered, and to test the differences between the groups on an univariate level a univariate analysis of...
Tipo: Journal article
Palavras-chave: Biochemical parameters; Selection; Differences; Youth soccer.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200013

Floral pipe: length in Petunia x hybrida heredability, number of genes and the interaction of the date with the character
Provedor de dados: 46
Autores: Fatta,N.; Vazquez,M.; García,N.; Mascarini,A.; Grigioni,G.
Petunia x hybrida, a floral summer of a economical importance in Buenos Aires, is nowadays produced with imported seed. The research presented is focused on the study of the feasibility to obtain locally competitive seed. The length of the floral pipe is a relevant character so the assay was designed in order to estimate the heredability, the number of genes intervener and the interactions with the date. The assay began with a F1 purchased from United States. In 2003, the F1 and F2 were sowed,739 individuals of F2 were placed in pots in three dates: 12/6, 26/6 and 8/7/2003 that were considered as blocks I, II and III respectively in a completely randomized design. It was assumed that the homocigotas would be situated in the tales of the F2 distribution,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic variance; Environmental variance; Seed production; Selection.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332007000200002

High evolutionary potential of marine zooplankton
Provedor de dados: 16
Autores: Peijnenburg, K.T.C.A.; Goetze, E.
Open ocean zooplankton often have been viewed as slowly evolving species that have limited capacity to respond adaptively to changing ocean conditions. Hence, attention has focused on the ecological responses of zooplankton to current global change, including range shifts and changing phenology. Here, we argue that zooplankton also are well poised for evolutionary responses to global change. We present theoretical arguments that suggest plankton species may respond rapidly to selection on mildly beneficial mutations due to exceptionally large population size, and consider the circumstantial evidence that supports our inference that selection may be particularly important for these species. We also review all primary population genetic studies of open ocean...
Tipo: Article / Letter to the editor
Palavras-chave: Adaptation; Climate change; Marine; Oceanic; Selection; Zooplankton; 42.72; 42.94.
Ano: 2013
URL: http://www.repository.naturalis.nl/record/470572

Towards modern petrological collections
Provedor de dados: 16
Autores: Kriegsman, L.M.
Petrological collections result from sampling for academic research, for aesthetic or commercial reasons, and to document natural diversity. Selection criteria for reducing and enhancing collections include adequate documentation, potential for future use, information density, time and money invested in specimens, and spatial and financial constraints. Application of these criteria to the voluminous (c. 300,000 samples) rock collections of the University of Amsterdam, led to partial acquisition by the Nationaal Natuurhistorisch Museum in Leiden (Naturalis) late in 2002. Selected items included: (i) historical collections; (ii) material from former overseas domains; (iii) material from poorly accessible areas; (iv) material useful for research at the museum...
Tipo: Article / Letter to the editor
Palavras-chave: Geology; Petrology; Collections; Selection; De-selection; De-accessioning; 38.25.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/215464

Resistance to Chalkbrood Disease in Apis mellifera L. (Hymenoptera: Apidae) Colonies with Different Hygienic Behaviour
Provedor de dados: 82
Autores: Invernizzi,C; Rivas,F; Bettucci,L.
Chalkbrood disease affects the larvae of honeybees Apis mellifera L. and is caused by the fungus Ascosphaera apis. Infected larvae die when they are stretched in the cap cell and suffer a gradual hardening that ends in a very hard structure (mummie). Several studies have demonstrated that colonies that express an efficient hygienic behaviour (uncapping of cell and subsequent removal of dead brood) exhibit a higher resistance to the disease. However, it remains unclear whether the advantage of hygienic colonies over less hygienic ones lies in the ability to remove mummies or in the early detection of infected larvae and its cannibalization before they harden. To elucidate this aspect, the hygienic behaviour of 24 colonies, which were subsequently provided...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Honey bee; Ascosphaera apis; Larva; Selection.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000100004

量的形質の表現型変異におよぼす環境効果と遺伝子型と環境との相互作用効果
Provedor de dados: 19
Autores: Miura, Hideho; 三浦, 秀穂.
Palavras-chave: Genotype-environment interaction; Heritability; Nicotiana rustica; Selection; 遺伝子型と環境との相互作用; 遺伝力; ルスチカタバコ; 選抜.
Ano: 1991
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1674

Changes in Follicular Vascularity during the First Follicular Wave in Lactating Cows
Provedor de dados: 19
Autores: ACOSTA, Tomas J.; HAYASHI, Ken-Go; MATSUI, Motozumi; MIYAMOTO, Akio; 松井, 基純; 宮本, 明夫.
Increase in the blood supply to individual follicles appears to be associated with follicular growth rates and the ability to become the dominant follicle, while reduced thecal vascularity appears to be closely associated with follicular atresia. Therefore, this study aimed to determine the real-time changes in the vascularity of the follicle wall during the first follicular wave in cycling Holstein cows. Normally cycling and lactating cows (n=5) were examined by transrectal color Doppler ultrasonography (the sensitivity for velocity: &gt; 2 mm/sec) to determine the changes in the vasculature of the follicle wall (presence or absence of blood flow) and the diameter of follicles. A new follicular wave and ovulation were induced by GnRH injection at 48 h...
Palavras-chave: Blood flow; Follicular wave; Selection; Deviation; Cow.
Ano: 2005
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2979

Chickpea Cultivar ICCV 1
Provedor de dados: 30
Palavras-chave: Chickpeas; Pigeonpeas; Absorption; Humus; Tillage equipment; Land management; Yields; Sampling; Selection; Tropical zones.
Ano: 1984
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3772

Chickpea Variety Nabin (ICCL 81248)
Provedor de dados: 30
Palavras-chave: Chickpeas; Millets; Yields; Plant habit; Selection; Location; Tropical zones; Crossing over; Crops; Thinning.
Ano: 1994
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4652

Pearl Millet Variety ICMV 1
Provedor de dados: 30
Palavras-chave: Millets; Germplasm; Grain; Hybrids; Tolerance; Sexual reproduction; Tillage equipment; Yields; Selection; Diseases.
Ano: 1985
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3759

Pigeonpea Variety ICPL 87
Provedor de dados: 30
Palavras-chave: Pigeonpeas; Millets; Grain legumes; Tolerance; Yields; Land management; Research methods; Tropical zones; Performance; Selection.
Ano: 1993
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3842

Pearl Millet Variety SDMV 89004
Provedor de dados: 30
Palavras-chave: Millets; Grain; Humus; Breeds (animals); Rural development; Tropical zones; Dormancy; Tillage equipment; Selection; Seasons.
Ano: 1997
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3872

Pearl Millet Male-Sterile Line ICMA 4 and its Maintainer Line ICMB 4
Provedor de dados: 30
Palavras-chave: Hybrids; Animal fibres; Grain; Millets; Selection; Yields; Tropical zones; Crossing over; Developmental stages; Animal husbandry.
Ano: 1985
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3770

Pigeonpea Variety ICPL 332
Provedor de dados: 30
Palavras-chave: Pigeonpeas; Genotypes; Tolerance; Germplasm; Yields; Wet season; Pesticides; Tropical zones; Selection; Research methods.
Ano: 1992
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3833

RAINFALL PROBABILITY ESTIMATES FOR SELECTED LOCATIONS OF SEMI-ARID INDIA
Provedor de dados: 30
Autores: S.M.
Palavras-chave: Precipitation; Selection; Seasons; Dry season; Wet season; Purification; Phenomena; Crops; Farming systems; Weather hazards.
Ano: 1982
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3982

Pearl millet variety ICMV 1
Provedor de dados: 30
Palavras-chave: Millets; Germplasm; Grain; Hybrids; Tolerance; Sexual reproduction; Tillage equipment; Yields; Selection; Diseases.
Ano: 1985
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3315

Chickpea Desi Variety ICCV 7
Provedor de dados: 30
Palavras-chave: Chickpeas; Grain legumes; Breeds (animals); Tropical zones; Fungi; Yields; Research methods; Selection; Crops; Resources.
Ano: 1988
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3776

Chickpea Cultivar ICCV 1
Provedor de dados: 30
Palavras-chave: Chickpeas; Pigeonpeas; Absorption; Humus; Tillage equipment; Land management; Yields; Sampling; Selection; Tropical zones.
Ano: 1984
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3164

Comparison of Farmer-Participatory Research Methodologies
Provedor de dados: 30
Autores: H.A.
Palavras-chave: Research methods; Participation; Farm inputs; On-farm research; Technology; Replication; Millets; Selection; Information dissemination; Land resources.
Ano: 2001
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3728

Chickpea Variety Nabin (ICCL 81248)
Provedor de dados: 30
Palavras-chave: Chickpeas; Millets; Yields; Plant habit; Selection; Location; Tropical zones; Crossing over; Crops; Thinning.
Ano: 1994
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3850

Rainfall probability estimates for selected locations of semi-arid India
Provedor de dados: 30
Autores: S.M.
Palavras-chave: Precipitation; Selection; Seasons; Dry season; Wet season; Purification; Phenomena; Crops; Farming systems; Weather hazards.
Ano: 1982
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4160

Chickpea Scientists’ Meet organized at ICRISAT, Patancheru
Provedor de dados: 30
Autores: Gaur, P.M.
Palavras-chave: Chickpeas; Germplasm; Breeds (animals); Participation; Selection; Group communication; Research methods; Products; Livestock.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3323

Pearl Millet Variety TSPM 91018
Provedor de dados: 30
Palavras-chave: Germplasm; Grain; Crossing over; Millets; Cropping systems; Breeds (animals); Yields; Seasons; Selection; Crop residues.
Ano: 1997
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3871

A new kabuli chickpea variety for Ethiopia
Provedor de dados: 30
Autores: Daba, K.
Palavras-chave: Chickpeas; Breeds (animals); Markets; Location; Tropical zones; Yields; Exports; Products; Supply; Selection.
Ano: 2005
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3232

(Ocotea porosa Ness et Martius ex. Nees, Lauraceae) from populations of mixed of mixed Ombrophylous forest
Provedor de dados: 190
Autores: Kalil Filho, Antonio Nascim; Hirano, Elcio; Sturion, José Alfredo; Sousa, Valderês Aaparecida de; Marzollo, Luiz Gustvo; Nicolotti, Filipe; Ukan, Daniele.
Exploitation of imbuya (Ocotea porosa) occurred at the same time of Araucaria angustifolia. Imbuya is threatned of extinction, owns a valuable wood and for these characteristics, Embrapa Florestas, located at Colombo, State of Paraná, Brazil, decided to make efforts for its conservation ex-situ. Collects in Southern Brazil at the localities of Caçador, Canoinhas (State of Santa Catarina), Colombo and Bocaiúva do Sul (State of Paraná) were realized. A complete randomized design was used in 12 months age seedlings. In this experiment, height of thirty one progenies ordered in plots of five plants with four replications was measured. The general mean for height was 16,55 cm. The additive genetic variance estimate was 72,03, the heritability coefficient...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selection; Germplasm; Genetic gain; Genetic parameters; Breeding Seleção; Germoplasma; Ganhos genéticos; Parâmetros genéticos; Melhoramento.
Ano: 2004
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1591

Genetic parameters and performance of sugarcane families under cold stress in the South of Brazil
Provedor de dados: 86
Autores: Verissimo,Mario Alvaro Aloisio; Oliveira,Ricardo Augusto de; Silva,Sérgio Delmar dos Anjos e; Daros,Edelclaiton; Härter,Adílson.
Abstract: The objective of this work was to estimate the genetic parameters for the performance prediction of sugarcane (Saccharum spp.) families under natural cold stress, in Southern Brazil, and to identify the best combinations of parents aiming at the selection for tolerance to cold. Fifty-three full-sib families were evaluated in an incomplete block design, with five replicates per family, in the municipality of Pelotas, in the state of Rio Grande do Sul, Brazil. Harvest occurred in August 2013, nine months after planting and after cold spells with negative temperatures down to -2.2ºC. Statistical analyses, performed with the mixed model methodology, detected significant differences among families. Heritability estimates among progeny means were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum; Cold tolerance; Plant breeding; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000500583

Selection strategies of segregant soybean populations for resistance to Asian rust
Provedor de dados: 86
Autores: Ribeiro,Aliny Simony; Toledo,José Francisco Ferraz de; Ramalho,Magno Antonio Patto.
The objective of this work was to identify the best selection strategies for the more promising parental combinations to obtain lines with good resistance to soybean Asian rust (Phakopsora pachyrhizi). Two experiments were carried out in the field during the 2006/2007 and 2007/2008 growing seasons, to determine the percentage of infected leaf area of individual plants of five parents and their segregant F2 and F3 populations. The data obtained indicates that additive genetic variance predominates in the control of soybean resistance to Asian rust, and that the year and time of assessment do not significantly influence the estimates of the genetic parameters obtained. The narrow-sense heritability (h²r) ranged from 23.12 to 55.83%, and indicates the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Phakopsora pachyrhizi; Additive variance; Heritability; Selection.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001100012

Methods of adaptability and stability applied to eucalyptus breeding
Provedor de dados: 86
Autores: Santos,Osmarino Pires dos; Carvalho,Ivan Ricardo; Nardino,Maicon; Olivoto,Tiago; Pelegrin,Alan Junior de; Szareski,Vinícius Jardel; Ferrari,Mauricio; Nunes,Andrei Caíque Pires; Demari,Gustavo Henrique; Lautenchleger,Francine; Souza,Velci Queiróz de; Maia,Luciano Carlos da.
Abstract: The objective of this work was to evaluate the consistency of the methods of Annicchiarico, Lin &amp; Binns, Wricke, and factor analysis in identifying eucalyptus clones with stability, adaptability, and high productive potential. Eight-four clones, with three years of age, from the genetic breeding program of the company CMPC Celulose Riograndense were used. Three field experiments were carried out in a randomized complete block design, in an 84x3 factorial arragement, with 20 replicates of one plant per plot. The clones were evaluated as to diameter at breast height, plant height, and volume of wood. The methods of Annicchiarico and Lin &amp; Binns are highly correlated with each other, and their use together with the method of Wricke is a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus; Average ranking; Experimental planning; Factor analysis; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000100053

Genetic analysis of productive and reproductive traits in multiple-breed dairy cattle populations
Provedor de dados: 86
Autores: Ribeiro,Virgínia Mara Pereira; Merlo,Fernanda Albuquerque; Gouveia,Gabriela Canabrava; Winkelstroter,Larissa Kretli; Abreu,Luíza Rodrigues Alves; Silva,Marcos Vinícius Gualberto Barbosa da; Panetto,João Cláudio do Carmo; Paiva,Leandro de Carvalho; Cembranelli,Marcello de Aguiar Rodrigues; Toral,Fabio Luiz Buranelo.
Abstract: The objective of this work was to determine whether the random regression model using linear splines (RRMLS) is suitable to estimate the genetic parameters for productive and reproductive traits of a multiple-breed dairy cattle population, as well as to investigate the effect of the genetic group of the progeny on the genetic merit of the sire. The multiple-trait model (MTM) and the RRMLS with one knot fitted for every genetic group were used to obtain the genetic parameters. Records of 1/2 Holstein + 1/2 Gyr (1/2HG), 5/8 Holstein + 3/8 Gyr (5/8HG), and 3/4 Holstein + 1/4 Gyr (3/4HG) crossbreed dams were considered. The RRMLS showed better fitting. The additive and residual variances estimated by the MTM and the RRMLS were similar. Heritability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gyr; Heritability; Heterosis; Holstein; Selection.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101109

Divergence and genetic variability among superior rubber tree genotypes
Provedor de dados: 86
Autores: Gouvêa,Lígia Regina Lima; Chiorato,Alisson Fernando; Gonçalves,Paulo de Souza.
The objective of this work was to estimate the genetic variability and divergence among 22 superior rubber tree (Hevea sp.) genotypes of the IAC 400 series. Univariate and multivariate analyses were performed using eight quantitative traits (descriptors), including yield. In the univariate analyses, the estimated parameters were: genetic and environmental variances; genetic and environmental coefficients of variation; and the variation index. The Mahalanobis generalized distance, the Tocher agglomerative method and canonical variables were used for the multivariate analyses. In the univariate analyses, variability was verified among the genotypes for all the variables evaluated. The Tocher method grouped the genotypes into 11 clusters of dissimilarity. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hevea brasiliensis; Crossbreeding; Multivariate analysis; Selection.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000200007

Agronomic performance of quinoa selected in the Brazilian Savannah
Provedor de dados: 86
Autores: Spehar,Carlos Roberto; Santos,Roberto Lorena de Barros.
Twenty six breeding lines, selected from individual plant progenies of hybrids among varieties Amarilla de Marangani, Blanca de Junín, Chewecca, Faro 4, Improved Baer, Kancolla, Real, and Salares-Roja, had their agronomic characters evaluated, in Planaltina, DF, Brazil (15º36'S and 47º12'W), 1,000 masl, in randomized complete blocks, on a Ferralsol, previously limed and fertilized. Grain yield was positively associated with plant height, inflorescence length and diameter, and plant cycle. Genetic gain can be attained by selection based in these characters for commercial production of quinoa in tropical regions.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chenopodium quinoa; Breeding line; Selection; Yield; Cerrado.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000600012

Genetical and environmental analyses of yield in six biparental soybean crosses
Provedor de dados: 86
Autores: TOLEDO,JOSÉ FRANCISCO FERRAZ DE; ARIAS,CARLOS ALBERTO ARRABAL; OLIVEIRA,MARCELO FERNANDES DE; TRILLER,CLÁUDIA; MIRANDA,ZILDA DE FÁTIMA SGOBERO.
The yearly genetic progress obtained by breeding for increased soybean yield has been considered acceptable worldwide. It is common sense, however, that this progress can be improved further if refined breeding techniques, developed from the knowledge of the genetic mechanisms controlling soybean yield, are used. In this paper, data from four cultivars and/or lines and their derived sets of F2, F3, F7, F8, F9 and F10 generations assayed in 17 environments were analyzed to allow an insight of the genetic control of soybean yield under different environmental conditions. The general picture was of a complex polygene system controlling yield in soybeans. Additive genetic effects predominated although dominance was often found to be significant. Complications...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Genetic control; Selection; Polygenes; Genotype environment interaction; Breeding methods.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000900011

Designs and model effects definitions in the initial stage of a plant breeding program
Provedor de dados: 86
Autores: Souza,Emanuel Fernando Maia de; Peternelli,Luiz Alexandre; Barbosa,Márcio Henrique Pereira.
The objective of this work was to compare the relative efficiency of initial selection and genetic parameter estimation, using augmented blocks design (ABD), augmented blocks twice replicated design (DABD) and group of randomised block design experiments with common treatments (ERBCT), by simulations, considering fixed effect model and mixed model with regular treatment effects as random. For the simulations, eight different conditions (scenarios) were considered. From the 600 simulations in each scenario, the mean percentage selection coincidence, the Pearsons´s correlation estimates between adjusted means for the fixed effects model, and the heritability estimates for the mixed model were evaluated. DABD and ERBCT were very similar in their comparisons...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Augmented design; Incomplete block; Selection; Heritability; Sugarcane; Stochastic simulation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000300001

Multivariate analyses of genotype x environment interaction of popcorn
Provedor de dados: 86
Autores: Miranda,Glauco Vieira; Souza,Leandro Vagno de; Guimarães,Lauro José Moreira; Namorato,Heraldo; Oliveira,Lucimar Rodrigues; Soares,Marcelo Oliveira.
The objectives of this work were to evaluate the genotype x environment (GxE) interaction for popcorn and to compare two multivariate analyses methods. Nine popcorn cultivars were sown on four dates one month apart during each of the agricultural years 1998/1999 and 1999/2000. The experiments were carried out using randomized block designs, with four replicates. The cv. Zélia contributed the least to the GxE interaction. The cv. Viçosa performed similarly to cv. Rosa-claro. Optimization of GxE was obtained for cv. CMS 42 for a favorable mega-environment, and for cv. CMS 43 for an unfavorable environment. Multivariate analysis supported the results from the method of Eberhart &amp;amp; Russell. The graphic analysis of the Additive Main effects and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Adaptability; Breeding; Maize; Popcorn; Selection; Stability.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000100007

Morphological and genetic characteristics allow the identification of a collection of garlic cultivars in the North-Central region of Mexico
Provedor de dados: 85
Autores: Azuara Hern ández,L; Silos Espino,H; Perales Segovia,C; Gómez Leyva,JF; Alpuche Solís,AG; Macias Valdez,LM.
The objective of this study was to compare the yield and genetic relationships between two Perla garlic selections, obtained by indi­vidual selection of cloves, and commercial varieties and cultivars adapted to diverse regions of Mexico (which did not have a selection process). Varieties with fewer cloves showed higher yields. Coreano and California produced 20 ton/ha (fresh weight) and Perla selections between 17-19 ton/ha (fresh weight). Six primers of the series OPB were tested for genetic characteriza-tion and OPB-17 was selected. With the amplified DNA fragments, a binary matrix was generated; afterwards, a dissimilarity matrix and dendrogram were developed. High genetic diversity was found among all varieties, which were separated into two groups...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: RAPDs; Allium sativum; Selection; Yield.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572008000100007

Shikimate accumulation, glyphosate absorption and translocation in horseweed biotypes
Provedor de dados: 87
Autores: CARDINALI,V.C.B.; DIAS,A.C.R.; MUELLER,T.C.; ABERCROMBIE,L.; STEWART JR.,C.N.; TORNISIELO,V.L.; CHRISTOFFOLETI,P.J.
In Brazil, few research works on mechanisms of weed resistance to glyphosate have been conducted so far. Therefore, this research aimed to study analytical procedures determining the relation between the concentration of plant shikimate after glyphosate application and the plant resistance to this herbicide; and evaluate the glyphosate absorption and translocation into two resistant ® and susceptible (S) horseweed biotypes to glyphosate. Horseweed plants with nine true leaves received glyphosate (720 g a.e. ha-1), and 2, 3, 4, 7 and 10 days after application (DAA) the concentration of shikimic acid was measured by HPLC. In another experiment, plants were treated with radiolabeled glyphosate (14C) (1.456 MBq mmol-1 specific activity) and radioactivity was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conyza bonariensis; High Performance Liquid Chromatography; EPSPS; Selection; Radioactivity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100109

Tolerance to Glyphosate in Broadleaf Buttonweed and White-Eye Biotypes
Provedor de dados: 87
Autores: DIESEL,F.; TREZZI,M.M.; GALLON,M.; BALBINOT JR.,A.A.; PAGNONCELLI,F.B.
ABSTRACT: Infesting species of Rubiaceae family have great importance in soybean crops in Southwest of Paraná and North of Santa Catarina, especially due to the selection of tolerant populations caused by the pressure of selection exerted by intensive use of glyphosate. The study aimed to evaluate the levels of tolerance to glyphosate in biotypes of broadleaf buttonweed (Borreria latifolia) (BL) and white-eye (Richardia brasiliensis) (RB) by means of dose-response curves. Two experiments were conducted in a greenhouse, in completely randomized design (CRD), with four replications. Fourteen BL biotypes and eleven RB biotypes were evaluated, collected in soybean fields of Paraná and Santa Catarina. The doses of glyphosate were 0, 74, 163, 360, 792 and 1,742...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Borreria latifolia; Herbicide; Richardia brasiliensis; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100338

Estudo sobre os Processos de Recrutamento e Seleção em Agroindústrias: uma análise em dois estudos de casos
Provedor de dados: 31
Autores: Araujo,   Geraldino Carneiro; Dias,   Edilaine Mendes.
O objetivo do trabalho é analisar e avaliar as formas de recrutar e selecionar pessoas, visto que os recursos humanos são fatores importantíssimos para o funcionamento de qualquer organização. Esse estudo de caso foi feito em duas agroindústrias verificando o seu processo de recrutamento e seleção de pessoal. O tipo de pesquisa é descritivo que expõe características de determinada população ou de determinado fenômeno. A análise foi feita em cima das respostas obtidas na entrevista das duas empresas. Foi observado como são as suas práticas de recrutamento e seleção. Fica evidente que o processo de recrutamento e seleção deve ser feito com muito cuidado, pois, as conseqüências de um processo errado como diminuição da produtividade, absenteísmo, insatisfação...
Tipo: Conference Paper or Presentation
Palavras-chave: Recrutamento; Seleção; Agroindústria. Recruitment; Selection; Agroindustry.; Agribusiness; Labor and Human Capital.
Ano: 2008
URL: http://purl.umn.edu/107869

Laboratory Protocols 2008: Maize Nutrition Quality and Plant Tissue Analysis Laboratory
Provedor de dados: 31
Autores: Gallicia,   L.; Nurit,   E.; Rosales,   A.; Palacios-Rojas,   N.
Tipo: Report
Palavras-chave: Zea mays; Maize; Wheats; Triticum; Transgenic plants; Genetic engineering; Gene transfer; Genetic transformation; DNA hybridization; Phenotypes; Selection; Tissue culture; In vitro culture; Biolistics; Research projects; Methods; Molecular cloning; PCR; Crop Production/Industries; F02; F30.
Ano: 2009
URL: http://purl.umn.edu/56177

Converting to organic farming in France: Is there a selection problem?
Provedor de dados: 31
Autores: Latruffe,   Laure; Nauges,   Celine.
Using a sample of French crop farms during the 1999-2006 period, we test whether less technically efficient farmers are more likely to engage in organic farming in order to benefit from conversion subsidies. Despite some limitations in our data, we find no evidence of such selection effect. On the contrary, our estimation results indicate that more technically efficient farmers are more likely to convert to organic farming. This finding is found to be robust to the method of calculation of efficiency scores, either parametric or non-parametric. This study also confirms that farm’s characteristics (education, farm size and legal status) and farmers’ practices under conventional farming do impact the probability of conversion to OF.
Tipo: Conference Paper or Presentation
Palavras-chave: Organic farming; Technical efficiency; Subsidies; Selection; France; Agricultural and Food Policy; Crop Production/Industries; Farm Management; Land Economics/Use.
Ano: 2010
URL: http://purl.umn.edu/109386

FACTORS INFLUENCING FARMERS' SELECTION OF A MILK HANDLER
Provedor de dados: 31
Autores: Kilmer,   Richard L.; Lee,   Jonq-Ying; Carley,   Dale H.
A structural probit model is estimated to determine the change in the probability of selecting a milk handler.  Cooperatives are thought to have lower prices and higher deductions than independent milk handlers and these factors reduce the probability that a farmer will select a cooperative by 0.39 and 0.32.  Cooperatives are thought to have better services and an assured market and payment than independent mile handlers and these factors increase the probability that a farmer will select a cooperative by 0.20 and 0.26.  This indicates that many cooperative members value monetary characteristics over non-monetary characteristics.
Tipo: Journal Article
Palavras-chave: Cooperatives; Processors; Attributes; Selection; Probit; Dairy; Livestock Production/Industries.
Ano: 1994
URL: http://purl.umn.edu/15174

Adoption and Profitability of Breeding Technologies on United States Dairy Farms
Provedor de dados: 31
Autores: Khanal,   Aditya R.; Gillespie,   Jeffrey M.
Adoption decisions and profitability of advanced breeding technologies are analyzed for U.S. dairy farms. The bivariate probit with selection model is used. Results show that specialized, younger, more educated farmers with longer planning horizons are more likely to adopt the technologies, with positive impacts on profitability and negative influences on cost of production.
Tipo: Conference Paper or Presentation
Palavras-chave: Breeding technologies; Dairy; Profitability; Bivariate probit; Selection; Artificial insemination; Sexed semen; Embryo transfer; Farm Management; Livestock Production/Industries; Production Economics; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2011
URL: http://purl.umn.edu/98574

LOGÍSTICA INTERNA DE FRUTAS, LEGUMES E VERDURAS (FLV) EM SUPERMERCADOS: UM ESTUDO MULTICASOS EM CAMPO GRANDE/MS.
Provedor de dados: 31
Autores: Campeao,   Patricia; Oliveira,   Leidy Diana Souza De; Watanabe,   Eluiza Alberto de Morais; Ramos,   Gessica Genevieve Lopes.
A presente pesquisa tem como objeto de investigação o sistema de logística interna de FLV em supermercados. Estabeleceu-se como objetivo geral caracterizar as operações logísticas internas de FLV utilizadas pelos supermercados. Especificamente: a) identificar as atividades e fluxos da logística interna nas organizações supermercadistas; b) apresentar as diferenças básicas entre os modelos de gestão interna de logística em supermercados de pequeno, médio e grande porte; c) identificar as políticas de compra, armazenamento e distribuição que podem ser adotados pelos supermercados com relação à gestão de FLV. O estudo desta temática justifica-se pela necessidade de se conhecer as melhores práticas de gerenciamento logístico interno. A metodologia utilizada...
Tipo: Conference Paper or Presentation
Palavras-chave: FLV; Seleção; Armazenamento; Logística interna; Supermercados; Selection; Storage; Intern logistic; Supermarkets; Agribusiness.
Ano: 2008
URL: http://purl.umn.edu/114164

Natural Experiment Evidence on Whether Selection Bias Overstates the Gains from Migration
Provedor de dados: 31
Autores: Gibson,   John; McKenzie,   David; Rohorua,   Halahingano; Stillman,   Steven.
Migration of workers from developing to developed countries and the resulting remittance flows are important development policies. World Bank calculations show that restrictions on international migration have larger welfare costs than the more widely studied restrictions on international trade. But estimated gains from migration may be affected by selection bias, with differences in outcomes for migrants and non-migrants reflecting unobserved differences in ability, skills, and motivation, rather than the act of moving itself. This poster illustrates this selection bias in commonly used statistical corrections for nonrandom selection. A unique survey conducted by the authors of Tongan migrants in New Zealand, and of non-migrants in Tonga is used. New...
Tipo: Conference Paper or Presentation
Palavras-chave: Migration; Selection; Natural Experiment; Labor and Human Capital; 015; J61; F22; C93.
Ano: 2006
URL: http://purl.umn.edu/25704

Morphological genetic markers for selection of broiler lines
Provedor de dados: 89
Autores: Schmidt,GS; Coutinho,LL; Figueiredo,EAP de; Ledur,MC; Alves,HJ.
Two paternal broiler lines (LL and LLc, originated from the same stock in 1998) of Embrapa Suinos e Aves genetic program were used. Line LL had been selected for eight generations for rapid growth while LLc had been mated randomly, without selection, as a control line. In the last generation, 30 males and 240 females were used in hierarchical matings with pedigree control to determine sire effect. The same number of birds were used, but matings were at random for LLc. Eggs of both lines were incubated and embryos were collected in different development stages (40, 45, 50, 55 and 60 hours after setting) in order to determine somite number (NOS). The number of evaluated embryos were 1,967 and 498 for LL and LLc, respectively. This study aimed to determine...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic; Heritability; Selection; Somite.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000300003

Ovarian Morphology and Egg Quality Traits of Egyptian Selected Strain for Egg Production Compared with Commercial Laying Strains
Provedor de dados: 89
Autores: Nassar,FS; El-Komy,EM; Abdou,AM.
ABSTRACT An experiment was conducted to evaluate the effect of selection for egg production performance of Cairo L-2 strain, as a local layer strain, after five generations of selection on productivity, ovarian morphology and some egg quality traits versus commercial Lohmann Brown-Lite (LBL) strain. The performance in the 5th generation was evaluated in Cairo L-2 and LBL strains for live body weight at sexual maturity (BWSM), age at sexual maturity (ASM), first egg weight (FEW), ovarian morphology, ovarian follicles number, ovarian weights and diameter, oviduct weight, liver weight, and stroma weight and their percentages to live body weight at sexual maturity for Cairo L-2 and LBL strains. Egg traits at 36 weeks of age including: egg number (EN), egg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Egg quality; Ovarian morphology; Selection; Sexual maturity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400683

Genetic gain for body weight, feed conversion and carcass traits in selected broiler strains
Provedor de dados: 89
Autores: Schmidt,GS; Figueiredo,EAP; Ledur,MC.
The Brazilian Swine and Poultry Research Center (Embrapa Suínos e Aves) maintains a chicken breeding program for meat production since 1985. Two control lines (LLc and PPc) are maintained, whereas two male lines (TT and ZZ) and three female lines (PP, VV and KK) have been selected. This paper reports the genetic gain after 15 generations of combined selection (mass and independent culling levels) in order to develop the commercial broiler stocks Embrapa 021 and Embrapa 022. Selection pressure has been exerted on weight gain, carcass traits and fertility. In addition, female lines have also been selected for egg production, whereas males have been selected for feed efficiency since 1992. All lines have been selected for breast area instead of carcass traits...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Control line; Crossbreeding; Genetic gain; Meat production; Production; Selection.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000100004

Diversity and efficiency of bradyrhizobium strains isolated from soil samples collected from around sesbania virgata roots using cowpea as trap species
Provedor de dados: 90
Autores: Florentino,Ligiane Aparecida; Sousa,Pedro Martins de; Silva,Jacqueline Savana; Silva,Karina Barroso; Moreira,Fatima Maria de Souza.
The genetic diversity of ten Bradyrhizobium strains was evaluated for tolerance to high temperatures, to different salinity levels and for the efficiency of symbiosis with cowpea plants (Vigna unguiculata (L.) Walp.). Eight of these strains were isolated from nodules that appeared on cowpea after inoculation with suspensions of soil sampled from around the root system of Sesbania virgata (wand riverhemp) in ecosystems of South Minas Gerais. The other two strains used in our analyses as references, were from the Amazon and are currently recommended as cowpea inoculants. Genetic diversity was analyzed by amplifying repetitive DNA elements with the BOX primer, revealing high genetic diversity with each strain presenting a unique band profile. Leonard jar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological N2 fixation; Selection; Inoculant strains; Phenotypic diversity; Genotypic diversity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400011

Bradyrhizobium spp. Strains in Symbiosis with Pigeon Pea cv. Fava-Larga under Greenhouse and Field Conditions
Provedor de dados: 90
Autores: Rufini,Márcia; Oliveira,Dâmiany Pádua; Trochmann,André; Soares,Bruno Lima; Andrade,Messias José Bastos de; Moreira,Fatima Maria de Souza.
ABSTRACT: Optimization of symbiosis between nitrogen-fixing bacteria and legumes has been extensively studied, seeking agricultural sustainability. To evaluate the symbiotic efficiency of nitrogen-fixing bacterial strains belonging to the Bradyrhizobium genus with pigeon pea (Cajanus cajan (L.) Millsp.) cv. Fava-Larga, experiments were conducted in Leonard jars (axenic conditions), pots with soil, and in the field. Ten strains were tested in Leonard jars, and three strains, in addition to BR 29, were selected according to their ability to promote the growth of pigeon pea, for further tests in pots with different soil types (Inceptsol and Oxisol) and in the field (Oxisol). Treatments were compared with strains BR 2003 and BR 2801 (approved as inoculants for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cajanus cajan; Inoculant; Biological nitrogen fixation; Selection.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100432

Mutation induction as a strategy to overcome the restricted genetic base in Physalis
Provedor de dados: 94
Autores: Trevisani,Nicole; Melo,Rita Carolina de; Bernardy,João Pedro Fossa; Pierre,Patrícia Maria Oliveira; Coimbra,Jefferson Luís Meirelles; Guidolin,Altamir Frederico.
Abstract  The restricted genetic base in physalis in Southern Brazil is a challenge that requires genetic breeding for the achievement of fruits with superior agronomic quality. Therefore, genetic changes were induced in physalis for the selection of populations with superior fruit quality. To that end, seven populations of physalis were submitted to gamma irradiation (0,100 and 200 Grays – Gy), which provided 21 populations. Significant population difference was observed, which indicates the existence of variability between at least two populations of physalis. The contrasts showed difference for Colômbia01, Colômbia02, Caçador and CAV. The mutation induction was effective at causing genetic variations in these populations. For Colombia01 (100 Gy), it was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Small fruit; Gamma radiation; Cobalt60; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000300801

Physical and chemical variability of Camu-camu fruits in cultivated and uncultivated areas of the Colombian Amazon
Provedor de dados: 94
Autores: Aguirre-Neira,Juan Carlos; Reis,Maurício Sedrez dos; Cardozo,Maritza Adelina Rojas; Raz,Lauren; Clement,Charles Roland.
Abstract  Camu-camu (Myrciaria dubia, Myrtaceae) has the highest reported vitamin C concentrations of any native Amazonian fruit tree species, with increasing demand in domestic and international markets. With the goal of aiding management and conservation programs, we studied the diversity of camu-camu in cultivated and uncultivated areas, based on physicochemical characterization of the fruits. We evaluated 2,250 fruits from 87 plants from six localities of the Tarapacá district (Amazonas, Colombia) and from the Amazonian fruit germplasm bank of Agrosavia (Meta, Colombia). We found high physicochemical variability within and among localities, and superior fruits in the localities where non-cultivated plants were sampled, especially Pechiboy. Using...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tarapacá; Myrciaria dubia; Selection; Improvement.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000200801

SELECTION OF FISÁLIS POPULATIONS FOR HIBRIDIZATIONS, BASED ON FRUIT TRAITS
Provedor de dados: 94
Autores: TREVISANI,NICOLE; SCHMIT,RODOLFO; BECK,MATTHEUS; GUIDOLIN,ALTAMIR FREDERICO; COIMBRA,JEFFERSON LUÍS MEIRELLES.
ABSTRACT  The objective of this study was to characterize the genetic variability in fisális populations and select promising parents based on fruit traits. The experimental design consisted of randomized blocks, with six populations. Five plants per treatment were sampled. The evaluated traits were fruit weight, capsule weight, 1000- seed weight and fruit diameter. The data were subjected to multivariate analysis of variance with error specification between and within (p &lt;0.05). Mahalanobis’ distance was used as a measure of genetic dissimilarity. Significant differences for the assessed traits were detected between fisális populations. The ratio error among by within indicated no need for sampling within the experimental unit. Dissimilarity was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physalis peruviana L.; Genetic Variation; Selection.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200702

‘BRS MANDINHO’: THE FIRST PLATYCARPA PEACH CULTIVAR RELEASED IN BRAZIL
Provedor de dados: 94
Autores: RASEIRA,MARIA DO CARMO BASSOLS; SCARANARI,CIRO; FRANZON,RODRIGO CEZAR; FELDBERG,NELSON PIRES; NAKASU,BONIFÁCIO HIDEYUKI.
ABSTRACT  In recent years, platycarpa peaches have reached high prices due to their good acceptance in the international market. However, the great majority of the released varieties are high chill and do not adapt to Brazilian conditions except on a few microclimes of high altitudes. The cultivar BRS Mandinho is the first peach cultivar of the botanical variety platicarpa, released in Brazil and adapted to subtropical conditions. The plants are vigorous and, in the state of Rio Grande do Sul, the blooming occurs on the second half of July. The fruits are sweet and ripe in November with an average weight of 55.3 g.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Breeding; Selection; Prunus persica var. platycarpa.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000300804

Genetic analysis of whole mitochondrial genome of Lateolabrax maculatus (Perciformes: Moronidae) indicates the presence of two populations along the Chinese coast
Provedor de dados: 103
Autores: Gong,Jie; Chen,Baohua; Li,Bijun; Zhou,Zhixiong; Shi,Yue; Ke,Qiaozhen; Zhang,Dianchang; Xu,Peng.
ABSTRACT The whole mitochondrial genome of Lateolabrax maculatus (Cuvier, 1828) was used to investigate the reasons for the observed patterns of genetic differentiation among 12 populations in northern and southern China. The haplotype diversity and nucleotide diversity of L. maculatus were 0.998 and 0.00169, respectively. Pairwise FST values between populations ranged from 0.001 to 0.429, correlating positively with geographic distance. Genetic structure analysis and haplotype network analysis indicated that these populations were split into two groups, in agreement with geographic segregation and environment. Tajima’s D values, Fu’s Fs tests and Bayesian skyline plot (BSP) indicated that a demographic expansion event may have occurred in the history of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptation; Genetic differentiation; Selection.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702020000100314

Dissecting the genetic architecture of complex traits and its impact on genetic improvement programs: lessons learnt from the Virginia chicken lines
Provedor de dados: 96
Autores: Pettersson,Mats E.; Carlborg,Örjan.
Long-term selection experiments provide a valuable resource for understanding the genetic changes that take place in animal improvement programs. The Virginia chicken lines have for more than 50 years been subjected to single-trait, bi-directional, divergent selection for high and low juvenile body weight. It is one of the most well studied experimental populations in agricultural animals and has played an instrumental role in the understanding of the genetic basis of complex traits. In this paper, we summarize the findings from the more recent publications focusing on the efforts to identify the loci contributing to selection response as well as discuss the currently ongoing research. We conclude by describing some future research prospects that promise...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight; Chicken; Epistasis; Metabolic; QTL; Selection.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300028

Persistency of lactation using random regression models and different fixed regression modeling approaches
Provedor de dados: 96
Autores: Cobuci,Jaime Araujo; Costa,Claudio Napolis.
Milk yield test-day records on the first three lactations of 25,500 Holstein cows were used to estimate genetic parameters and predict breeding values for nine measures of persistency and 305-d milk yield in a random regression animal model using two criteria to define the fixed regression. Legendre polynomials of fourth and fifth orders were used to model the fixed and random regressions of lactation curves. The fixed regressions were adjusted for average milk yield on populations (single) or subpopulations (multiple) formed by cows that calved at the same age and in the same season. Akaike Information (AIC) and Bayesian Information (BIC) criteria indicated that models with multiple regression lactation curves had the best fit to test-day milk records of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breeding value; Legendre polynomial; Selection; Test-day milk yield.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900005

Selective breeding of Arabian and Thoroughbred racehorses in Algeria: perceptions, objectives and practices of owners-breeders
Provedor de dados: 96
Autores: Tennah,Safia; Farnir,Frédéric; Kafidi,Nacerredine; Nsangou,Ibrahim Njikam; Leroy,Pascal; Antoine-Moussiaux,Nicolas.
This survey, conducted with 461 racehorse owners-breeders in Algeria between 2009 and 2011, investigates their perceptions, objectives and practices regarding selective breeding. Racehorse breeding is a full-time professional activity for a third of interviewees. The holdings are small-sized with 77% owning one or two mares. The regular practice of mating is here used to categorize breeders according to their degree of professionalization (38.4% professional vs. 61.6% occasional breeders). Experience in the sector was also used to classify breeders, considering as "junior" the breeders under 10 years experience (38.8%) and as "senior" those above 10 years (61.2%). More than professionalization, experience shows a significant impact on practices and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal-breeding; Flat racing; Horses; Horse breeder; Selection; Survey.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000400188

Heritability estimation and genetic correlations for mature weight, visual scores, and growth traits in Nellore cattle
Provedor de dados: 96
Autores: Koetz Junior,Celso; Roso,Vanerlei Mozaquatro; Fávaro,Patricia da Cruz; Pereira,Gabriel Ribas; Borges,Marcelo Henrique Favaro; Barca Junior,Flávio Antônio; Barcellos,Júlio Otávio Jardim; Ribeiro,Edson Luis de Azambuja.
ABSTRACT This study was intended to estimate the genetic associations between growth traits and visual scores with possible changes in mature weight (MW) in 397,900 Nellore animals. A bi-character analysis was performed to estimate the (co)variances and genetic parameters for MW, which comprises the following traits: conformation, finishing precocity, musculature at weaning (WC, WP, and WM) and yearling (YC, YP, and YM), birth weight (BW), weight from birth to weaning (WG), weight from weaning to yearling (YG), and final index (FIND). The observed mean MW was 417.6±56.2 kg, and the direct genetic effect mean estimated heritability (    h 2    a 1) of MW was 0.45. Overall, the BW was 31.0±3.7 kg, and the estimated h² was 0.34. The heritability estimate of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Growth parameters; Productive traits; Selection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100301

Genetic parameters for milk traits, somatic cell, and total bacteria count scores in Brazilian Jersey herds
Provedor de dados: 96
Autores: Sabedot,Mayara Andressa; Romano,Gabrieli de Souza; Pedrosa,Victor Breno; Pinto,Luís Fernando Batista.
ABSTRACT This study aimed to estimate the heritability of milk yield (MY), fat percent (F%), fat yield (FY), protein percent (P%), protein yield (PY), somatic cell score (SCS), and total bacterial count score (TBCS) as well as to estimate the genetic correlations among these traits, using a dataset from 5,918 lactations of Jersey cows in Brazil. The covariance components were estimated by restricted maximum likelihood using the PEST and VCE6 programs. The average values obtained for MY, F%, FY, P%, PY, SCS, and TBCS were 5017.5 kg, 4.3%, 192.3 kg, 3.3%, 173.0 kg, 5.9, and 2.9, respectively, while the heritability values were 0.16, 0.55, 0.18, 0.61, 0.25, 0.21, and 0.08, respectively. The genetic correlations ranged from low to high magnitude, with positive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic correlation; Heritability; Mastitis resistance; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100408

Alternatives for analysis of performance data and ranking of Charolais x Nellore crossbred bulls in performance tests
Provedor de dados: 96
Autores: Toral,Fábio Luiz Buranelo; Alencar,Maurício Mello de.
It was evaluated alternatives for analysis of performance records and ranking of Charolais x Zebu crossbred bulls. Data of weight at six ages and average daily weight gain in eight periods of 883 21/32 Charolais + 11/32 Nellore bulls in performance tests were used. The direct additive genetic values were predicted in single trait analysis using animal models with classificatory fixed effects of contemporary groups and age of dam at calving and age of animal at weighing as linear covariable, depending on the trait. As random effects, it was considered the direct additive genetic effect, the permanent maternal environmental and residual effects for all traits. Phenotypic values adjusted for fixed effects included in the model of each trait were also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossbred bulls; Least square; Mixed models; Selection.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000700013

Persistence in milk, fat and protein production of primiparous Holstein cows by random regression models
Provedor de dados: 96
Autores: Biassus,Igor de Oliveira; Cobuci,Jaime Araújo; Costa,Claudio Napolis; Rorato,Paulo Roberto Nogara; Braccini Neto,José; Cardoso,Leandro Lunardini.
Total numbers of 56,508, 35,091 and 8,326 records of milk, fat, and protein test-day yields, respectively, were used to estimate genetic parameters for six persistency measures on milk, fat and protein productions of Holstein cows reared in Minas Gerais state. Covariance components for additive genetic effects and permanent environmental effects were estimated by REML in random regression models using Legendre polynomials from the third to the sixth order. Overall, models with the highest orders of Legendre polynomials showed the best quality of adjustments of these productive records. Heritability estimates obtained by the models for persistence in milk, fat, and protein yields ranged from 0.04 to 0.32, from 0.00 to 0.23, and from 0.00 to 0.27,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic correlation; Heritability; Legendre polynomials; Random regression model; Selection.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001200009

Genetic evaluation of Devon Cattle using a reaction norms model
Provedor de dados: 96
Autores: Corrêa,Marcela Bicca Bragança; Dionello,Nelson José Laurino; Cardoso,Fernando Flores.
The objective of this study was to evaluate differences in sire genetic values obtained by a conventional animal model (AM) and by a reaction norms hierarchical model (RNHM) that considers the genotype by environment interaction. A total of 25,500 records was used collected by PROMEBO - beef cattle improvement program of the National Breeders Association "Herd Book Collares" on Devon cattle born from 1980 though 2005. Post weaning gain 345 adjusted (PWG345) was the evaluated trait and the INTERGEN program was employed for data analysis. Reaction norms of the 25 sires with larger offspring showed ranking exchanges and scale effect in the environmental gradient. Spearman rank correlations between genetic values obtained by AM and RNHM at low, medium and high...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genotype by environmental interaction; Selection; Sire ranking.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000100017

Optimum contribution selection using differential evolution
Provedor de dados: 96
Autores: Carvalheiro,Roberto; Queiroz,Sandra Aidar de; Kinghorn,Brian.
A program to determine optimum contribution selection using differential evolution was developed. The objective function to be optimized was composed by the expected merit of the future progeny and the coancestry among selected parents. Simulated and real datasets of populations with overlapping generations were used to validate and test the performance of the program. The program was computationally efficient and feasible for practical applications. The expected consequences of using the program, in contrast to empirical procedures to control inbreeding and/or to selection based exclusively on expected genetic merit, would be the improvement of the selection response and a more effective control of inbreeding.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Evolutionary algorithms; Genetic response; Inbreeding; Optimization; Selection.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000700005

Genetic parameters for type score traits and milk production in Brazilian Jersey herds
Provedor de dados: 96
Autores: Sabedot,Mayara Andressa; Romano,Gabrieli de Souza; Pedrosa,Victor Breno; Pinto,Luís Fernando Batista.
ABSTRACT This study aimed to estimate the heritability coefficients for ten functional type traits and milk production in the Jersey breed in Brazil, besides the genetic and phenotypic correlations between them. The present study utilised data from 1,567 records of linear type traits, including stature (ST), body depth (BD), loin strength (LS), rump width (RW), rump angle (RA), fore udder attachment (FUA), front teat placement (FTP), rear udder height (RUH), central ligament (CL), and final score (FS). Milk yield (MY) adjusted to 305 lactation days was also calculated. Covariance components were estimated by the restricted maximum likelihood approach using the PEST and VCE6 programs on the animal model. Heritability coefficients thus assessed were as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dairy cattle; Genetic correlation; Heritability; Selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100409

Estimation of genetic parameters for growth traits in Tabapuã cattle using a multi-trait model
Provedor de dados: 96
Autores: Menezes,Gilberto Romeiro de Oliveira; Torres,Robledo de Almeida; Torres Júnior,Roberto Augusto de Almeida; Silva,Luiz Otávio Campos da; Gondo,Andrea; Euclydes,Ricardo Frederico.
To provide information that can contribute to the genetic evaluation and selection in Tabapuã cattle, genetic parameters were estimated for growth traits using a multi-trait animal model. (Co)variance components were estimated by a Bayesian approach using the Gibbs Sampler. Moderate and similar responses to selection are expected when selecting for weights at the four ages evaluated, since the direct heritability estimates were similar and of average magnitude (0.18 to 0.19). The direct and maternal additive genetic correlations between all pairs of weights were higher than 0.70, indicating a high degree of association between the four traits. This suggests that using any of them as selection criteria will result in correlated response in the others and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bayesian; Beef cattle; (co)variance components; Genetic evaluation; Selection.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800006

Use of orthogonal functions in random regression models in describing genetic variance in Nellore cattle
Provedor de dados: 96
Autores: Silva,Thiago Bruno Ribeiro da; Araújo,Cláudio Vieira de; Bittencourt,Thereza Cristina Borio dos Santos Calmon de; Araújo,Simone Inoe; Lôbo,Raysildo Barbosa; Bezerra,Luiz Antônio Framartino; Silva,Delvan Alves da; Silva,Alessandra Alves da.
A total of 204,912 records of birth weights up to 550 days of age, of 24,890 Nellore cattle, offspring of 375 sires and 16,917 dams from five herds in the state of Mato Grosso, Brazil, were used in order to describe the variability of the weight development by random regression models. The model evaluated as the most suitable used the covariance function of fourth order to describe the variability of the effects of additive genetic, animal permanent environmental and maternal effects of third order to describe the maternal genetic effect, with four classes of residual variance. Heritability estimates ranged from 0.18 to 0.46 from the beginning of trajectory to 210 days of age, from 0.45 to 0.48 post-weaning to 365 days of age and from 0.47 to 0.57 at later...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Live weight; Selection.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000400004

Residual feed intake and relationships with performance of Nellore cattle selected for post weaning weight
Provedor de dados: 96
Autores: Lucila Sobrinho,T.; Branco,R.H.; Bonilha,S.F.M.; Castilhos,A.M.; Figueiredo,L.A.; Razook,A.G.; Mercadante,M.E.Z.
The objective of this work was to evaluate performance, efficiency parameters and phenotypic correlations among measurements of energy efficiency of Nellore cattle selected for post weaning weight and classified according to residual feed intake, calculated by the difference between observed and predicted intake, based on average metabolic body weight and average daily gain. Thus, animals were classified within three groups: high (&amp;gt; mean + 0.5 standard deviation, less efficient); medium (±0.5 standard deviation of the mean); and low (&lt; mean - 0.5 standard deviation, more efficient) residual feed intake. No differences were observed at initial and final body weights, average daily gain and dry matter intake among groups. Animals with low residual...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Efficiency parameters; Selection.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000400030

Repeatability of agronomic characters in Brachiaria brizantha cultivars
Provedor de dados: 96
Autores: Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Jank,Liana; Cunha,Daniel de Noronha Figueiredo Vieira da; Souza,Madson Williame Melo; Brito,Gerlane Ferreira de; Oliveira,Leandro Pereira de.
This experiment was carried out with the objectives of determining repeatability coefficients, the number of harvests necessary to increase accuracy and the genotypic stability of yield characteristics in Brachiaria brizantha cultivars in the northeast region of Brazil in the period from July 2009 to March 2011. The experimental design used was completely randomized with three treatments (Brachiaria brizantha var. Marandu, Xaraés and Piatã) and three replications. Each plot was harvested seven times: five in the rainy season and two in the dry season. Immediately after each harvest, the forage was weighed and dried to obtain total, stem, leaf and dead dry matter yields. For the estimation of the repeatability coefficient, analysis of variance, principal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage breeding; Forage production; Selection.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000100005

Feedlot performance, feed efficiency and carcass traits in Nellore cattle selected for postweaning weight
Provedor de dados: 96
Autores: Lucila Sobrinho,Tatiana; Bonilha,Sarah Figueiredo Martins; Gonçalves,Heraldo Cesar; Castilhos,André Michel de; Magnani,Elaine; Razook,Alexander George; Branco,Renata Helena.
The objective of this study was to evaluate the correlated responses to selection for growth in feed efficiency and carcass traits of Nellore animals. A total of 121 animals of the Nellore control (NeC) and selection herds were subjected to performance testing and classified regarding residual feed intake (RFI). Sixty-seven of these animals were selected and finished until reaching 4 mm of subcutaneous fat thickness between the 12th and 13th ribs. The animals were slaughtered at a mean age of 541 days and mean live weight of 423 kg for NeS and of 363 kg for NeC, and carcass traits were measured. Animals in NeS presented higher initial and slaughter weights, dry matter intake, hot and cold carcass weight, weight of retail cuts, and carcass yield than NeC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Carcass yield; Meat cuts; Selection.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000200007

Genetic parameters for test day milk yield of first lactation Holstein cows estimated by random regression using Legendre polynomials
Provedor de dados: 96
Autores: Costa,Claudio Napolis; Melo,Claudio Manoel Rodrigues de; Packer,Irineu Umberto; Freitas,Ary Ferreira de; Teixeira,Nilson Milagres; Cobuci,Jaime Araujo.
Data comprising 263,390 test-day (TD) records of 32,448 first parity cows calving in 467 herds between 1991 and 2001 from the Brazilian Holstein Association were used to estimate genetic and permanent environmental variance components in a random regression animal model using Legendre polynomials (LP) of order three to five by REML. Residual variance was assumed to be constant in all or in some classes of lactation periods for each LP. Estimates of genetic and permanent environmental variances did not show any trend due to the increase in the LP order. Residual variance decreased as the order of LP increased when it was assumed constant, and it was highest at the beginning of lactation and relatively constant in mid lactation when assumed to vary between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Covariance components; Dairy cattle; Genetic evaluation; Heritability; Selection.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008000400003

Genetic parameters for type traits in Holstein cows in Brazil
Provedor de dados: 96
Autores: Campos,Rafael Viegas; Cobuci,Jaime Araujo; Costa,Claudio Napolis; Braccini Neto,José.
Data from 26,558 Holstein cows in 802 herds were used to estimate genetic, residual and phenotypic parameters for 22 type traits. The model included the fixed effects of herd-year, period of classification, classifier, stage of lactation and age of cows at calving (covariate) and random genetic and residual effects. Heritability for type traits ranged from 0.10 to 0.39. The genetic variability in these traits suggested the possibility for moderate genetic gains through selection. The phenotypic correlations were moderated, mainly in the section conformation. Genetic correlations between type traits ranged from -0.44 to 0.85. High genetic correlations indicated that breeding programs could be successful without including all type traits. The selection for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: (co)variance components; Dairy cattle; Genetic correlations; Heritability; REMLF90; Selection.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000003

Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves
Provedor de dados: 96
Autores: Toral,Fábio Luiz Buranelo; Torres Júnior,Roberto Augusto de Almeida; Lopes,Paulo Sávio; Cardoso,Fernando Flores; Silva,Luiz Otávio Campos da.
The objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of genetic and residual heteroskedasticity and/or homoskedasticity. The inference on a posteriori distributions of genetic parameters were by the Monte Carlo method via Markov chains. The model with genetic and residual heteroskedasticity was the best fit on the data. Groups of animals with different genetic compositions, expressed as percentages of Charolais-Zebu breed alleles and individual and maternal heterozygosis, had different genetic variances. These...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal breeding; Bayesian inference; Canchim; Crossbreeding; Selection.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500013

Feed efficiency of Nellore cattle selected for postweaning weight
Provedor de dados: 96
Autores: Castilhos,André Michel de; Branco,Renata Helena; Corvino,Tatiana Lucila Sobrinho; Razook,Alexander George; Bonilha,Sarah Figueiredo Martins; Figueiredo,Leopoldo Andrade de.
Two Nellore herds were compared, one selected for greater postweaning weight and the other, control, selected for average postweaning weight, to evaluate the effects of 29 years of selection on feed efficiency. Sixty Nellore males (41 selected and 19 control) averaging 205 kg and 267 days of age were evaluated in individual pens during performance test. Performance and dry matter intake were used to determine the following feed efficiency traits: feed conversion; residual feed intake; residual gain; partial growth efficiency; relative growth rate and Kleiber ratio. After the 112-day experimental period, control animals showed lower body weight when compared to selected animals, however, they did not differ for dry matter intake (% of body weight), rib-eye...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Feed conversion; Residual feed intake; Selection.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001100023

Breeding objectives and economic values for traits of low input family-based beef cattle production system in the State of Rio Grande do Sul
Provedor de dados: 96
Autores: Laske,Carlos Henrique; Teixeira,Bruno Borges Machado; Dionello,Nelson José Laurino; Cardoso,Fernando Flores.
The objectives of this study were to define breeding objectives and derive economic weights for production traits in family-based beef cattle systems, assess the sensitivity of these weights to changes in market and husbandry indicators and estimate the expected genetic changes in the selection criteria proposed. Based on data from the production systems, farms revenues and expenses, obtained from interviews and meetings with producers, a bioeconomic model was derived, relating biological traits of animals with the financial result of the production system based on calf-crop, selling male calves and culling cows for finishing. Traits considered in the model as breeding goals were weaning rate, weaning weight and cow weight. The economic weights, obtained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Breeding objectives; Economic weights; Selection; Smallholders.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200010

Body chemical composition, tissue deposition rates and gain composition of young Nellore cattle selected for postweaning weight
Provedor de dados: 96
Autores: Bonilha,Eduardo Figueiredo Martins; Branco,Renata Helena; Bonilha,Sarah Figueiredo Martins; Araújo,Fabiana Lana de; Cyrillo,Joslaine Noely dos Santos Gonçalves; Magnani,Elaine.
Empty body and carcass chemical composition were determined in 67 Nellore bulls from Selection Nellore (NeS) and Control Nellore (NeC) herds of an animal breeding program for growth, slaughtered at 570 days of average age, after 100 days of feedlot. Selection Nellore animals had, respectively, 360 and 430 kg of initial and slaughter body weight, and NeC animals had 318 and 373 kg for the same traits. Animals were slaughtered and empty body composition was determined by chemical analysis of the components blood, hide, head and feet, viscera and carcass. Tissue deposition rates and gain chemical composition were also determined based on gains estimated by comparative slaughter technique. Significant differences were detected between NeS and NeC animals for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bos indicus; Efficiency; Fat; Protein; Selection; Weight gain.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000400175

Genetic parameters and alternatives for evaluation and ranking of Nellore young bulls in pasture performance tests
Provedor de dados: 96
Autores: Fragomeni,Breno de Oliveira; Scalez,Daiane Cristina Becker; Toral,Fábio Luiz Buranelo; Bergmann,José Aurélio Garcia; Pereira,Idalmo Garcia; Costa,Paula Souza Teixeira da.
The objective of this study was to estimate (co)variance components for weight at 550 days, average daily gain and an index with both traits, and to compare alternatives for evaluation and ranking of Nellore young bulls in pasture performance tests. The heritability estimates were 0.73, 0.31 and 0.44 for weight at 550 days, average daily gain and index, respectively. Animals were ranked according to their predicted breeding values or the phenotypic deviations in relation to the mean of the test. Although the correlations between breeding values and phenotypic deviations were high, there were differences in the number of animals selected in common when the selection criteria were the predicted breeding values or the phenotypic deviations. Mixed models are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breeding value; Heritability; Least square; Mixed models; Selection.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800004

Genetic parameters for milk production by using random regression models with different alternatives of fixed regression modeling
Provedor de dados: 96
Autores: Cobuci,Jaime Araújo; Costa,Claudio Napolis; Braccini Neto,José; Freitas,Ary Ferreira de.
Records of test-day milk yields of the first three lactations of 25,500 Holstein cows were used to estimate genetic parameters for milk yield by using two alternatives of definition of fixed regression of the random regression models (RRM). Legendre polynomials of fourth and fifth orders were used to model regression of fixed curve (defined based on averages of the populations or multiple sub-populations formed by grouping animals which calved at the same age and in the same season of the year) or random lactation curves (additive genetic and permanent enviroment). Akaike information criterion (AIC) and Bayesian information criterion (BIC) indicated that the models which used multiple regression of fixed lactation curves of lactation multiple regression...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Test-day milk yield; Genetic correlation; Heritability; Legendre polynomial; Selection.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300013

Within selection
Provedor de dados: 97
Autores: VALENZUELA,CARLOS Y.
The synthetic theory of evolution proposes that biotic variations generated by mutation are mostly fixed, lost or maintained polymorphic by natural selection, with a marginal effect due to genetic drift. Based on the theory of autopoiesis some authors have proposed that selection is unable to explain most evolutionary changes, and natural or phenotype drift and epigenesis are the mechanisms that explain most of evolution. This view misunderstands basic evolutionary notions. Selection is a natural process that occurs with or without evolution; it does not explain evolution, it is a factor of the evolutionary process. The concept of autopoiesis implies an invariant condition of living beings, thus, it cannot explain and even less produce evolution conceived...
Tipo: Journal article
Palavras-chave: Autopoiesis; Evolution; Natural drift; Neutral evolution; Selection; Synthetic theory.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000100009

Repeatibility of agroindustrial characters in sugarcane in different harvest cycles
Provedor de dados: 124
Autores: Silva,Hudsonkléio Da Costa; Anunciação Filho,Clodoaldo José; Bastos,Gerson Quirino; Dutra Filho,João Andrade; Simões Neto,Djalma Euzébio.
ABSTRACT In commercial cultivation of sugarcane, knowledge about the repetition of agroindustrial characters is essential to identify long-lived genotypes in production cycles, which when selected, will contribute to the significant increase in productivity. This work evaluated the agroindustrial performance of 16 sugarcane genotypes in the sugarcane microregion Litoral Norte of Pernambuco in four harvest cycles and the regularity in the repetition of characters. The experiment was conducted in the agricultural area of São José sugar mill, Igarassu, state of Pernambuco, Brazil. The experiment was carried out following a randomized block design with four replications. The variables evaluated were: tons of POL per hectare (TPH), tons of cane per hectare...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Longevity; Productivity; Repetition of characters; Selection; Saccharum spp.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200275

Honey and propolis production, hygiene and defense behaviors of two generations of Africanized honey bees
Provedor de dados: 63
Autores: Garcia,Regina Conceição; Oliveira,Newton Tavares Escocard de; Camargo,Simone Cristina; Pires,Bruno Garcia; Oliveira,Carlos Antonio Lopes de; Teixeira,Rodrigo de Almeida; Pickler,Maricéia Ana.
Phenotypic characters of honeybees, relevant to beekeepers, can be evaluated by studying correlations between them, and the correlated characteristics can be evaluated in the short term to assist in monitoring of annual genetic progress. This work therefore aims to evaluate the production of honey and propolis, the hygiene and defensive behaviours of two generations of Africanized Apis mellifera (Hymenoptera, Apidae), to estimate the correlations between them and their heritability. We used 30 Langstroth beehives in apiaries in Marechal Cândido Rondon, Paraná State, Brazil. We used a method of drilling pupae to evaluate hygiene behaviour and the velveteen ball method to test defensive behaviour. We selected ten colonies which had the best honey and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apis mellifera; Animal production; Ethology; Selection.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000200003

Common bean genotypes for agronomic and market-related traits in VCU trials
Provedor de dados: 63
Autores: Chiorato,Alisson Fernando; Carbonell,Sérgio Augusto Morais; Bosetti,Fátima; Sasseron,Graziele Ramos; Lopes,Rodrigo Lorencetti Tunes; Azevedo,Cleber Vinícius Giaretta.
Value for Cultivation and Use (VCU) trials are undertaken when evaluating improved common bean (Phaseolus vulgaris L.) lines, and knowledge of agronomic and market-related traits and disease reaction is instrumental in making cultivar recommendations. This study evaluates the yield, cooking time, grain color and reaction to anthracnose (Colletotrichum lindemuthianum), Fusarium wilt (Fusarium oxysporum f. sp. phaseoli) and Curtobacterium wilt (Curtobacterium flaccumfaciens pv. flaccumfaciens) of 25 common bean genotypes derived from the main common bean breeding programs in Brazil. Seventeen VCU trials were carried out in the rainy season, dry season and winter season from 2009 to 2011 in the state of São Paulo. Analyses of grain color and cooking time were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Fusarium wilt; Curtobacterium wilt; Anthracnose; Selection.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000100034

Greenhouse screening for MDMV resistance of corn
Provedor de dados: 106
Autores: Wichai Kositratana; Suchada Kutium; Thira Sutabutra; Kitti Choonhawongse.
1 ill., 1 table
Palavras-chave: Corn; Maize; Maize dwarf mosaic virus; Variety trials; Selection; Disease resistance; Infection; ข้าวโพด; โรคไวรัสเอมดีเอมวี.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3964

การคัดเลือกพันธุ์ข้าวฟ่างอาหารสัตว์ที่ได้จากการผสมพันธุ์ระหว่างข้าวฟ่างอาหารสัตว์และข้าวฟ่างหวาน
Provedor de dados: 106
Autores: Thamrongsilpa Pothisoong; Somchai Piyapantavanon; Tawil Nilpayak.
1 table
Palavras-chave: Sorghum; Breeding; Forage sorghum; Sweet sorghum; Selection; ข้าวฟ่าง; ข้าวฟ่างอาหารสัตว์; ข้าวฟ่างหวาน; การคัดเลือกพันธุ์.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4210

Sorghum variety improvement
Provedor de dados: 106
Autores: Jinda Jan-orn; Julee Tippayaruk; Somsri Thaiwesna; Wantana Panichkul; Wantana Kittipornpaibool; Renu Chaisorn; Somchai Piyapantavanon; Vichitr Benjasil.
18 tables
Palavras-chave: Sorghum; Plant breeding; Variety improvement; Yellow endosperm; Selection; Variety trials; Yields; ข้าวฟ่าง; การปรับปรุงพันธุ์; พันธุ์เฮกการี่; แป้งสีเหลือง; ระบบการปลูกพืช; การทดสอบผลผลิต.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3959

Screening of sorghum varieties resistant to the sorghum shootfly, Atherigona soccata Rond.
Provedor de dados: 106
Autores: Sawarng Charoenying; Isichaikul, S.; Amornsak, W.
5 tables
Palavras-chave: Sorghum; Shootfly resistant; Atherigona soccata; Breeding; Selection; ข้าวฟ่าง; การปรับปรุงพันธุ์; หนอนแมลงวันเจาะยอดข้าวฟ่าง.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4413

Sorghum breeding
Provedor de dados: 106
Autores: Aran Patanothai; Prasit Jaisil; Krisakol Hutapat; Chatree Kulapapangkorn.
6 tables
Palavras-chave: Sorghum; Yield trials; TSS lines; KU lines; Regional trials; Population improvement; Plant breeding; Selection; Variety trials; Yields; ข้าวฟ่าง; การทดสอบผลผลิต; สายพันธุ์ทีเอสเอส; สายพันธุ์เคยู; การทดสอบในหลายท้องที่; การปรับปรุงประชากร.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3919

การคัดเลือกสายพันธุ์ข้าวกลายพันธุ์หอมนิลจากโครงการ TILLING ให้ทนทานต่อสภาพอุณหภูมิสูงในระยะเจริญพันธุ์ ภายใต้อุโมงค์จำลองสภาวะโลกร้อน
Provedor de dados: 106
Autores: Nat Panichawong; Sulaiman Je-arbu; Boonthong Wasuri; Thiwa Phakoktoom; Phoonphipob Kasemsub; Apichart  Vanavichit; Chanate Malumpong.
High temperatures during reproductive stages causes male sterility and fertilization failures resulting in yield decreasing dramatically. The purpose of this study was selecting rice mutant lines that tolerant to high temperatures during reproductive stages. The simulation tunnel for global warming condition was controlled gradually increasing temperature from the real environment temperature (25-30 degrees Celsius) in the morning to 40 to 45 degrees Celsius at 10 am and remain this condition for 6 hours and then the system in the tunnel was decreased the temperature to equal outside temperature at night time. For the fast screening of Hom nin mutant1,500 lines found that the mutants lines showed both tolerance and non-tolerance for high temperature...
Tipo: Collection
Palavras-chave: Rice; Selection; High temperature; Heat tolerance; ข้าว; การคัดเลือก; อุณหภูมิสูง; การทนต่อร้อน; พันธุ์กลาย; พันธุ์หอมนิล.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5375

Entomological research during 1976
Provedor de dados: 106
Autores: Somnuk Wongthong; Anuchit Chinajariyawong; Young, W.R.; Pramual Chaitooptong.
9 tables
Palavras-chave: Corn; Maize; Sorghum; Entomological research; Shoot fly; Armyworms; Webworms; Thrips; Patanga; Rose beetle; Corn earworm; Grain weevils; Pest insects; Economic injury thresholds; Selection; Varieties; Pest resistance; Insecticides; Insect control; Atherigona soccata; Mythimna separata; Stenachroia elongella; Adoretus compressus; ข้าวโพด; ข้าวฟ่าง; งานวิจัยด้านกีฏวิทยา; หนอนแมลงวันเจาะยอดข้าวฟ่าง; หนอนเจาะฝัก; หนอนใย; เพลี้ยไฟ; ตั๊กแตนปาทังก้า; ด้วงกุหลาบ; หนอนเจาะฝัก; มอด.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3877

Selection for desirable plant types in a maize composite variety
Provedor de dados: 106
Autores: Aday, B.A.; Carangal, V.R.
3 tables
Palavras-chave: Corn; Maize; Composite variety; Varieties; Selection; ข้าวโพด; พันธุ์ผสมเปิด.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3895

Selection for flintiness in Thai composite white
Provedor de dados: 106
Autores: Virtucio, Robert H.
Palavras-chave: Corn; Maize; Selection; Flintiness; White corn; Thai composite white; Plant breeding; ข้าวโพด; ข้าวโพดหัวแข็ง; ข้าวโพดสีขาว; พันธุ์ผสมเปิด.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3784

Sorghum breeding
Provedor de dados: 106
Autores: Krisda Samphantharak; Suranee Koonphol.
4 tables
Palavras-chave: Sorghum; Plant breeding; Selection; Variety trials; Growth; Yields; Pest resistance; Disease resistance; Genetic improvement; Hybrid program; Hybridization; Yield trials; ข้าวฟ่าง; อายุเก็บเกี่ยวสั้น; การต้านทานต่อศัตรูพืช; การปรับปรุงประชากร; โครงการพัฒนาลูกผสม; วิธีการคัดเลือก; การทดสอบผลผลิต.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3819

การเพิ่มระดับความต้านทานต่อโรคไหม้ในพันธุ์ข้าวเจ้าหอมพิษณุโลก 1 โดยใช้โมเลกุลเครื่องหมาย
Provedor de dados: 106
Autores: อภิชาต เนินพลับ; อัจฉราพร ณ ลำปาง เนินพลับ; สุรเดช ปาละวิสุทธิ์.
Rice blast is a one of the most important rice disease. It could cause severe yield damage. Therefore, it is vital for rice improvement aiming for blast resistance especially for those containing as good cooking quality as Khao Dawk Mali 105 (KDML105); Khao’ Jao Hawm Phitsanulok 1 (HPSL1) belongs to this group except a slightly longer maturity than that of KDML105. Nowadays, molecular technology has been used for a greater efficiency in selection through a marker assisted selection. DNA primers specific to gene(s) or QTLs related to rice blast defense mechanism were developed. In this study, a cross between HPSL1 and two donors; P280-2 and P280-5 was carried out. These donors contain blast resistance genes on chromosome 1, 2, 11 and 12 identified by 6...
Tipo: Collection
Palavras-chave: Khao’ Jao Hawm Phitsanulok 1; Rice blast; Lower Northern of Thailand; Marker assisted; Selection; ข้าวเจ้าหอมพิษณุโลก 1; โรคไหม้; ภาคเหนือตอนล่าง; โมเลกุลเครื่องหมาย; การคัดเลือกพันธุ์.
Ano: 2015
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5906

Research on corn and sorghum insects
Provedor de dados: 106
Autores: Sawarng Charoenying; Surachate Jamornmarn; Viroj Klibsuwan; Young, W.R.
6 tables
Palavras-chave: Corn; Maize; Sorghum; Insect pests; Selection; Varieties; Inbred line; Pest resistance; Stalk borers; Ostrinia furnacalis; Shoot fly; Atherigona soccata; Insecticides; Insect control; ข้าวโพด; ข้าวฟ่าง; แมลงศัตรูพืช; สารกำจัดแมลงศัตรู; หนอนเจาะลำต้นข้าวโพด; หนอนแมลงวันเจาะยอดข้าวฟ่าง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4090

S1 selection for downy mildew resistance in an erect leaf population
Provedor de dados: 106
Autores: Long, Vo-Dinh.
1 table
Palavras-chave: Corn; Maize; S1 lines; Downy mildew; Erect leaf population; Selection; Disease resistance; ข้าวโพด; โรคราน้ำค้าง; ประชากรข้าวโพดใบตั้ง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3786

เจาะลึกคัดเลือกพันธุ์ข้าว Super rice (ตอนที่ 2)
Provedor de dados: 106
Autores: Worawit Panichapat.
Tipo: Collection
Palavras-chave: Super rice; Rice breeding; Selection; Hybridization; Hybrid rice; ข้าวลูกผสม; การคัดเลือกพันธุ์; การผสมพันธุ์ข้าว; ความต้านทานต่อแมลง; ความต้านทานต่อโรค; ผลผลิต; ลักษณะทางการเกษตร.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5243

Selection for low ear placement in Thai composite
Provedor de dados: 106
Autores: Virtucio, Robert H.
1 table
Palavras-chave: Corn; Maize; Thai composite; Low ear corn; High ear corn; Selection; ข้าวโพด; ตำแหน่งฝักต่ำ; พันธุ์ผสมเปิด; ตำแหน่งฝักสูง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3787

เจาะลึกคัดเลือกพันธุ์ข้าว Super rice (ตอนที่ 1)
Provedor de dados: 106
Autores: Worawit Panitchapat.
Tipo: Collection
Palavras-chave: Super rice; Breeding; Selection; Hybridization; Hybrid rice; ข้าวลูกผสม; พันธุ์ผลผลิตสูง; การคัดเลือกพันธุ์; การผสมพันธุ์; ลูกผสมชั่วที่ 2; ความต้านทานต่อแมลง.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5230

Sorghum grain mold disease resistance screening
Provedor de dados: 106
Autores: Tuanchai Boon-Long; Komin Wirojwatanakul; Kanoktip Lertprasertrat; Somkiat Titatarn; Preecha Suriyapan.
Palavras-chave: Sorghum; Grain mold disease; Varieties; Disease resistance; Selection; ข้าวฟ่าง; โรครา; พันธุ์; ความต้านทานโรค; การคัดเลือก.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4305

Corn breeding and genetics
Provedor de dados: 106
Autores: Ampol Senanarong.
28 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Variety trials; Selection; Downy mildew; Disease resistance; Growth; Yields; Quality; ข้าวโพด; การปรับปรุงพันธุ์.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3825

Multiple regression as a method for the selection of early maturing varieties
Provedor de dados: 106
Autores: Singh, Joginder; Agarwal, K.N.; Sethi, A.S.
1 ill., 4 tables
Palavras-chave: Corn; Maize; Multiple regression; Selection; Early maturing varieties; ข้าวโพด; มัลติเปิล รีเกรสชั่น; การคัดเลือก; พันธุ์เบา.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3894

Sweet corn breeding
Provedor de dados: 106
Autores: Tavat Lavapauraya.
3 tables
Palavras-chave: Corn; Maize; Sweet corn; Plant breeding; Selection; Variety trials; Growth; Yields; ข้าวโพด; ข้าวโพดหวาน; การปรับปรุงพันธุ์; โรคราน้ำค้าง; รสชาติ; ผลผลิตฝักสด.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3824

Sorghum breeding
Provedor de dados: 106
Autores: Krisda Samphantharak; Prachum Jutawantana; Tisti Puntharo.
8 tables
Palavras-chave: Sorghum; Plant breeding; Pest resistance; Disease resistance; Hybrids; Yield trials; Selection; Variety trials; Yields; ข้าวฟ่าง; การปรับปรุงพันธุ์; พันธุ์เบา; พันธุ์ต้านทานโรค; พันธุ์ต้านทานแมลงศัตรู; พันธุ์ลูกผสม; การทดสอบผลผลิต; การสอบพันธุ์ในไร่นาเกษตรกร.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3863

การคัดเลือกนักออกแบบโดยผู้ส่งออกสินค้าของขวัญและของตกแต่งบ้านไทย
Provedor de dados: 106
Autores: Apisit Kaewcha; Amornsri Tanpipat; Thunyaluk Phetsatit.
Purpose of this study, “The Selection on Designers by Thai Exporters of Gifts and Home Decorative Products” was to analyze the designer selection by Thai exporters of gifts and home decorative products, the factors influencing their selection of designers, and their expectations of the designers. This study was a survey research of a sample group of 235 exporters of gifts and home decorative products through proportional sampling by product categories. The sample of businesses of Thai exporters of gifts and home decorative products was found that selection for designers by the majority of these exporters was through job advertisement and through seeking advice from respected
Tipo: Collection
Palavras-chave: Designers; Gifts; Home decorative products; Selection; Thai Exporters; ของขวัญ; ของตกแต่งบ้าน; ผู้ส่งออก; นักออกแบบ; การคัดเลือก; ความคาดหวัง; การออกแบบสินค้า; บ้านไทย.
Ano: 2010
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5228

Sorghum variety improvement
Provedor de dados: 106
Autores: Prakob Jan-aram; Teerasak Manupeerapan; Jinda Jan-orn; Permphul Chomjinda; Kanoktip Lertprasertrat; Opas Jantasuk; Chalaem Romphryk; Wantana Panichkul; Julee Lamyong.
14 tables
Palavras-chave: Sorghum; Plant breeding; Selection; Hybrids; Variety trials; Yields; ข้าวฟ่าง; การปรับปรุงพันธุ์; ข้าวฟ่างพันธุ์ชาลลุ; ข้าวฟ่างลูกผสม; คุณภาพทางอาหารสัตว์; การทดสอบผลผลิต.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3864

ข้าวเหนียวต้านทานแมลงบั่วสายพันธุ์ดีเด่น PRE04012-20-1-1-1
Provedor de dados: 106
Autores: Premrudee Pintaya; Kakanang Punyalue; Adul Sitthiwong; Pannipa Yajai; Kanjana Piboon; Kulchana Ketsuwan; Pitchanan Kunghair; Yawvaluck Kanyamee; Sakul Mulkum; Pairoj Chotinisakorn; Pichatorn Rueangdej; Payapbhubes Markkool; Nootjarin Jungkhun; Kornsiri Srinil; Sivapong Naruebal; Nongnuch Pradit; Silawan Chantharabutt; Phannee Jitta.
Gall midge is a major problem in the upper Northern part, a glutinous rice line PRE04012-20-1-1-1 was derived from a single cross between Sahm Samai and PRE96011-SPT-1-2-2-1-1 since 2004. The farmer field trials had tested in 2011-2013. In the wet season the high potential yield was 1,043 kg/rai while the average yield was 703 kg/rai which is non significant different from 710 kg/rai of RD14 and 704 kg/rai of SPT1. In the dry season the high potential yield  was 916 kg/rai while the average yield of PRE04012-20-1-1-1 and SPT1 were 714 kg/rai, but lower than RD14 (759 kg/rai) by 6 percent. The fertilizer test showed on the maximum yield of 780 kg/rai at the nitrogen level 20.4 kg. The line performed gall midge resistance (R-MS in green house, R-S in field...
Tipo: PhysicalObject
Palavras-chave: Glutinous rice; Non-photoperiod sensitive; Variety; Plant breeding; Selection; Pest resistance; Gall midge; Yields; Quality; Farmer adoption; Upper north region; ข้าวเหนียว; ข้าวไม่ไวต่อแสง; พันธุ์; การปรับปรุงพันธ์ุ; การคัดเลือกพันธุ์; การต้านทานแมลงศัตรูพืช; แมลงบั่ว; ปริมาณผลผลิต; คุณภาพเมล็ดข้าว; การยอมรับของเกษตรกร; ภาคเหนือตอนบน.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5657

Research on corn and sorghum pathology in Thailand
Provedor de dados: 106
Autores: Udom Pupipat; Kitti Choonhawongse; Thammasak Sommartya; Siangjeaw Piriyaprin; Warapa Kunaporn; Prachum Jutawantana.
6 ill., 18 tables
Palavras-chave: Corn; Maize; Sorghum; Pathology; Head mold; Leaf diseases; Downy mildews; Stalk rot; Diplodia zeae; Root diseases; Varieties; Disease resistance; Selection; Fungicides; Disease control; Yields; Fungitoxicology; Severity; Compost making; ข้าวโพด; ข้าวฟ่าง; โรคพืช; โรคราน้ำค้าง; โรคลำต้นเน่า; เชื้อสาเหตุ; สารกำจัดเชื้อรา; ดิพโพลเดีย; โรคที่เกิดกับราก; โรคราบนช่อข้าวฟ่าง; โรคทางใบ; โรคราสนิม.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4094

การปรับปรุงพันธุ์ข้าวซุปเปอร์ไรซ์
Provedor de dados: 106
Autores: Worawit Panitchapat.
Tipo: Collection
Palavras-chave: Rice varieties; Hybridization; Selection; Improvement varieties; ข้าว; พันธุ์ซุปเปอร์ไรซ์; การปรับปรุงพันธุ์; การผสมพันธุ์; วิธีการคัดเลือก; ลักษณะทางการเกษตร.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5295

Sorghum breeding
Provedor de dados: 106
Autores: Aran Patanothai; Prasit Jaisil; Chaicharn Wongsaman; Suchart Tangchupong.
9 tables
Palavras-chave: Sorghum; Plant breeding; Yield trials; Selection; Variety trials; Yields; ข้าวฟ่าง; การปรับปรุงพันธุ์; การทดสอบผลผลิต.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3865

Sorghum breeding 1977
Provedor de dados: 106
Autores: Krisda Samphantharak; Dumri Suriyapu; Tisti Puntharo.
7 tables
Palavras-chave: Sorghum; Plant breeding; Random mating; Hybrids; Yield trials; Crossing; Selection; Mould tolerance; Variety trials; Yields; ข้าวฟ่าง; การปรับปรุงพันธุ์; ประชากรจากการผสมพันธ์แบบสุ่ม; ข้าวฟ่างลูกผสม; การทดสอบผลผลิต; โรคราบนช่อข้าวฟ่าง.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3920

การอนุรักษ์และใช้ประโยชน์ข้าวพันธุ์พื้นเมืองในภาคตะวันออกเฉียงเหนือ
Provedor de dados: 106
Autores: Weerasak Hormsombut; Ronnachai Changsri.
Although traditional rice germplasm in northeastern Thailand is only a small portion comparing to modern popular varieties, they are still grown throughout the region. Those traditional varieties grown in the lower part of the region are mostly non-glutinous varieties, while those grown in the upper part are glutinous ones. The existence of these traditional varieties in the region is not only because of growing for sale, but also due to some special reason, such as, believes in their medicinal and nutritional properties, culture and ancestor’s believes. The main objective of this study is to preserve traditional rice varieties for farmers, with the strategic goal of protecting rice germplasm from losses. The experiments were conducted at Sakon Nakhon Rice...
Tipo: PhysicalObject
Palavras-chave: Traditional variety; Local variety; Special property; Special characteristic; Pure line; Selection; Exploration; Collection; Conservation; Utilization; ข้าวพันธุ์พื้นเมือง; คุณสมบัติพิเศษ; อัตลักษณ์เฉพาะพันธุ์; การคัดเลือกพันธุ์บริสุทธิ์; การสำรวจ; การรวบรวม; การอนุรักษ์; การใช้ประโยชน์.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5537

Genetic breeding on the bee Melipona scutellaris (Apidae, Meliponinae)
Provedor de dados: 36
Autores: Barros,José de Ribamar Silva.
A selection of queens of Melipona scutellaris through the most productive colonies were carried out during eight months in an orange honeyflow. Each of the colonies was evaluated by its production, that is, the gross weight production ( pollen, brood, geopropolis and wax of each hive). With this data a coefficient of repeatability was estimated by the intraclass correlation method, obtained r = 0.835 ± 0.071. The repeatibility is very high showing that the analysed data (production) is repeatable. Selection was then carried out using the regression coefficient of each colony and the respective production gain. Using these data the colonies were divided into three groups according to the method Vencovsky and Kerr (1982): a with the colonies of highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breeding; Selection; Melipona; Bee.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000100014

Canonical correlations among grapevine agronomic and processing characteristics
Provedor de dados: 1
Autores: Cargnin, Adeliano.
Canonical correlation analysis allows conclusions to be drawn about the occurrence and magnitude of associations between two groups of characteristics. This study estimated the magnitude of association and interdependence between two trait groups of clones of two varieties of Vitis vinifera grapes. The study was based on the mean data of eight characteristics from two experiments to test the performance of these clones: the first experiment provided data from seven clones of Cabernet Sauvignon, which evaluated in the northern San Joaquin Valley, California, United States, and the second data set was from six clones of the Chardonnay variety, which were evaluated in the Napa Valley, California, United States. The canonical correlations among the two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera; Multivariate analysis; Variety; Selection; Clones.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42619

Canonical correlations among grapevine agronomic and processing characteristics
Provedor de dados: 1
Autores: Cargnin, Adeliano.
Canonical correlation analysis allows conclusions to be drawn about the occurrence and magnitude of associations between two groups of characteristics. This study estimated the magnitude of association and interdependence between two trait groups of clones of two varieties of Vitis vinifera grapes. The study was based on the mean data of eight characteristics from two experiments to test the performance of these clones: the first experiment provided data from seven clones of Cabernet Sauvignon, which evaluated in the northern San Joaquin Valley, California, United States, and the second data set was from six clones of the Chardonnay variety, which were evaluated in the Napa Valley, California, United States. The canonical correlations among the two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera; Multivariate analysis; Variety; Selection; Clones.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42619

Capacidade combinatória de linhagens de pimentão a partir de análise dialélica multivariada - DOI: 10.4025/actasciagron.v32i2.3768
Provedor de dados: 1
Autores: Nascimento, Ildon Rodrigues; UFT; Maluf, Wilson Roberto; Universidade Federal de Lavras - UFLA; Golçalves, Luciano Donizete; Empresa de Pesquisa Agropecuária de Minas Gerais - EPAMIG; Faria, Marcos Ventura; Universidade Estadual do Centro-Oeste - UNICENTRO; Resende, Juliano Tadeu Vilela de; Universidade Estadual do Centro-Oeste - UNICENTRO; Nogueira, Douglas Willian; Universidade Federal de Lavras - UFLA.
O trabalho teve como objetivo gerar informações sobre a capacidade combinatória de linhagens de pimentão por meio da análise dialélica multivariada. Foram utilizadas 13 linhagens de pimentão previamente selecionadas com base na reação ao mosaico amarelo do pimentão, sendo oito linhagens com reação do tipo resistência e cinco com reação do tipo suscetibilidade, num dialelo 8 x 5, mais as linhagens parentais. Os 53 tratamentos foram avaliados em estufa em delineamento de blocos casualizados com quatro repetições, sendo avaliadas a produção total e precoce de frutos, massa média de frutos e altura de plantas. A partir dessas quatro características foi realizada a análise dialélica univariada e multivariada. A análise dialélica multivariada apresentou...
Palavras-chave: 5.01.03.05-9 Capsicum annuum; Heterose; Efeito gênico; Seleção 5.01.03.05-9 Capsicum annuum; Heterosis; Gene effects; Selection.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3768

Development of a bioassay to quantify the ricin toxin content of castor bean (Ricinus communis L.) seeds - doi: 10.4025/actasciagron.v34i4.11284
Provedor de dados: 1
Autores: Demant, Carlos Alberto Rauer; Universidade Estadual Paulista “Julio de Mesquita Filho”; Auld, Dick; Texas Tech University, Lubbock, Texas, United States; Demant, Aline Rodrigues de Mello; Texas Tech University, Lubbock, Texas, United States.
In this study, we developed a bioassay to quantify the ricin toxin content of castor bean seeds. Existing quantification methods do not always reflect actual toxicity of the seeds analyzed, which may present lower ricin content even though they are more toxic than seeds presenting a higher content of ricin. This is because these methods actually measure the addition of ricin RCA, which is a compound less toxic than pure ricin. We decided to use in this study, the nematode Caenorhabditis elegans, which has been widely used by the pharmaceutical industry. We tested two strains of C. elegans using different methods in 8 experiments. We examined 4 methods of extracting the ricin complex and 3 methods of exposing the nematodes. Among the nematode strains and...
Tipo: Laboratory analysis
Palavras-chave: Microbiologia e melhoramento genético de plantas 5.01.02.03-6 toxin; C. elegans; Selection; Ricinus microbiologia e melhoramento genetico de plantas.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/11284

Germination and emergence of passion fruit (Passiflora edulis) seeds obtained by self- and open-pollination
Provedor de dados: 1
Autores: Santos, Carlos Eduardo Magalhães dos; Morgado, Marcos Antônio Dell'Orto; Matias, Rosana Gonçalves Pires; Wagner Júnior, Américo; Bruckner, Claudio Horst.
Seed dormancy is an important adaptive mechanism in many species and is generally lost during plant domestication because of selection that occurs through the collection and planting of seeds. We compared germination and seedling emergence in selfed and open-pollinated progenies obtained from eight passion fruit vines (genotypes). Self-pollination was performed at the button stage to overcome self-incompatibility. The experiment was a randomized block design in a factorial scheme (2 x 8; type of progeny x genotypes) with four replicates and 50 seeds per experimental unit. At 14, 21 and 28 days after sowing, the germination percentage and the emergence speed index were analyzed. The total length of seedlings (cm), shoot length (cm), radicle length (cm) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.05-9 Passiflora edulis; Dormancy; Selection; Dominance. Melhoramento Vegetal.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19616

Repetibilidade e correlações fenotípicas de caracteres do fruto de bacuri no Estado do Maranhão - DOI: 10.4025/actasciagron.v31i4.723
Provedor de dados: 1
Autores: Silva, Ricardo Gonçalves; UFMA; Chaves, Maria da Cruz Lima; Agência Estadual de Pesquisa Agropecuária e Extensão Rural do Maranhão; Arnhold, Emmanuel; UFMA; Cruz, Cosme Damião; UFV.
O objetivo deste trabalho foi estimar parâmetros de repetibilidade e correlações fenotípicas em caracteres do fruto do bacuri (Platonia insignis Mart.). Foram avaliadas seis matrizes (genótipos) localizadas em seis municípios do Estado do Maranhão. Oito frutos foram colhidos por matriz, sendo mensurados diâmetro, comprimento, cavidade interna, peso e número de sementes por fruto, espessura da casca, peso de casca mais semente, rendimento de polpa, número de segmentos partenocárpico, Brix e acidez total titulável. Os dados foram submetidos à análise de variância. Os genótipos apresentaram variabilidade genética significativa para todos os caracteres, em nível de 1% de probabilidade pelo teste F. Apenas para cavidade interna do fruto, acidez total titulável...
Palavras-chave: 5.02.01.03-4    Genética e Melhoramento Florestal variância genética; Variância ambiental; Herdabilidade; Seleção 5.00.00.00-4 Ciências Agrárias; 5.01.00.00-9 Agronomia; 5.01.03.00-8 Fitotecnia; 5.01.03.05-9 Melhoramento Vegetal; Genetic variance; Environmental variance; Heritability; Selection.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/723

Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds
Provedor de dados: 2
Autores: Rangel, Adriano Henrique do Nascimento; Araújo, Thalita Polyana Monteiro; Lima, Guilherme Ferreira da Costa; Borba, Luiz Henrique Fernandes; Peixoto, Maria Gabriela Campolina Diniz; Lima Júnior, Dorgival Morais de.
 Milk production has high economic importance in dairy cattle production systems, which justifies its inclusion in genetic breeding programs. The objective of this study was to evaluate the genetic and phenotypic trends of dairy traits in Gyr (167 lactations) and Guzerá (148 lactations) breeds in the State of Rio Grande do Norte (RN). Milk, fat and protein production obtained from monthly dairy controls were the traits evaluated. The expected differences in progeny (DEPs) for these traits were estimated using an animal model. From the means of phenotypic values and DEPs, we estimated the genetic and phenotypic trends in linear regressions as a function of the year of calving of the animal. Positive genetic and phenotypic trends were observed for Gyr (26.8...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic progress; Milk production; Selection; Zebu.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36685

Indices of flow fruit detacher with angular vibrations at inertial threshing of sesame
Provedor de dados: 111
Autores: Ishpekov, Stoyan Savov; Zaykov, Rangel; Petrov, Petar; Ruschev, Dechko.
An experimental stand of flow rotational fruit detacher with asymmetric angular vibrations has been developed at the Agricultural University - Plovdiv (Bulgaria).   It is designed to detach fruits and seeds from the plants via inertial way. The aim of the presented paper was to evaluate the main indices of the flow fruit detacher at inertial threshing of non-dehiscent sesame varieties.  The results indicated that the detacher threshes over 95% of seeds without reducing their germination.   The seed moisture content is from 12.2% to 13.3%, which is two times higher than recommended for harvesting sesame with grain harvester.   The portion of the impurities in the threshed mixture is from 20.99% to 38.41% depending on varieties.   The detacher has reached...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural mechanization sesame harvesting; Mechanization; Selection; Damage saving technology.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3712

Simulated self-organization of death by inherited mutations
Provedor de dados: 42
Autores: Martins,Jorge S. Sá; Stauffer,Dietrich; Oliveira,Paulo M.C. de; Oliveira,Suzana Moss de.
An agent-based computer simulation of death by inheritable mutations in a changing environment shows a maximal population, or avoids extinction, at some intermediate mutation rate of the individuals. Our results indicate that death seems needed to allow for evolution of the fittest, as required by a changing environment.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Changing environment; Computer modeling; Evolution; Mutation; Selection.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400010

Kinematic and spermatic recovery after selection by centrifugation in colloid solutions of ovine cryopreserved semen
Provedor de dados: 45
Autores: Bergstein,T.G.; Bicudo,L.C.; Rodello,L.; Weiss,R.R.; Bicudo,S.D.
ABSTRACT Frozen and thawed ovine semen undergo morphological and functional changes that prevent or decrease the efficiency of fertilization. Sperm selection methods seek to improve the quality and viability of the fertilizing materials. Four sperm selection methods were employed, using two silica colloidal solutions coated with silane (silica colloidal-silane) or by polyvinylpyrrolidone (silica colloidal-PVP), and varying the volume of colloidal solution. Sperm kinematic and sperm recovery were evaluated by means of CASA. The protocols using silica colloidal-silane showed higher total motility (TM), progressive motility (PM) and percentage of rapid sperm (%RAP) compared to the methods employing silica colloidal-PVP and to the samples prior to sperm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ovine; Semen; Silane; Selection; Colloidal silica.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000601539

SNPs rs471462296, rs456245081 and rs438495570 in the 5’UTR region of DGAT1 gene in Nelore
Provedor de dados: 45
Autores: Freire,K.M.B.; Silva,C.C.; Duarte,S.S.M.; Teodoro,L.S.; Costa,E.O.A.; Silva,D.C.; Godoy,F.R.; da Cruz,A.D.; da Cruz,A.S.
RESUMO O objetivo desta pesquisa foi avaliar os SNPs rs471462296, rs456245081 e rs438495570 do gene DGAT1 em bovinos Nelore. Foram analisados 109 bovinos. A extração do DNA genômico foi realizada do sangue dos animais, usando-se o kit Ilustra Blood Genomic Prep Mini Spin® (GE Healthcare, UK). A concentração e o grau de pureza do DNA foram determinados por meio de espectrofotômetro (Nanodrop - Thermo Fisher Scientifc, USA). A genotipagem dos SNPs ocorreu mediante o emprego do ensaio Taqman® (Applied Biosystems, USA). Na análise genômica, não foram encontradas alterações nas frequências alélicas e genotípicas (P≥0,05) para os SNPs testados. Dessa forma, a região 5’UTR analisada apresentou-se monomórfica e a variação de SNPs não foi observada, o que limita...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Bovine; Phenotype; Genotype; Selection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000200720

Agronomic performance of sugarcane families in response to water stress
Provedor de dados: 53
Autores: Silva,Marcelo de Almeida; Soares,Rogério Augusto Bremm; Landell,Marcos Guimarães de Andrade; Campana,Mário Pércio.
Water deficit is one of the major factors limiting the production of sugarcane, especially in areas where there is a prolonged period of water deficiency, such as the West Central Brazilian region. One way to overcome this problem is to cultivate resistant or tolerant varieties. An experiment was set up at the Jalles Machado Sugar Mill, located near Goianésia, Goiás State, Brazil, to evaluate agronomic performance of several sugarcane families. A comparative analysis was carried out among the families under two irrigation regimes, one under regular environmental conditions and another under monthly irrigations during the period of water deficiency. Evaluated families consisted of 25 progenies planted in a factorial design with three replications with 20...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selection; Water deficit; Irrigation; Brix.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052008000300014

Genetic variability and homozygosity in a F4 castor bean population by microsatellite markers
Provedor de dados: 53
Autores: Machado,Edna Lobo; Silva,Simone Alves; Fernandes,Luciel dos Santos; Brasileiro,Helison Santos.
ABSTRACT The objectives of this study were to identify the genetic variability and estimate the level of homozygosity in a castor bean F4 population using microsatellite markers (SSR). To this end, it was performed the genotyping of the population through 53 pairs of SSR primers. Allele frequencies were estimated by number of alleles per locus, expected heterozygosity (He), observed heterozygosity (Ho) and polymorphic information content (PIC). An array of genetic dissimilarity was generated by Nei and Li index, and hierarchical cluster analysis was performed using the Unweighted Pair-Group Method Averages (UPGMA) method. Polymorphism was detected in a total of eight loci (15.09%) of the 53 evaluated, with the presence of two alleles per locus. Allele...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L.; Breeding; Selection.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300307

Early selection of elite plants in Asparagus
Provedor de dados: 53
Autores: COINTRY,ENRIQUE LUIS; LÓPEZ ANIDO,FERNANDO SEBASTIÁN; GATTI,ILEANA; CRAVERO,VANINA PAMELA; FIRPO,INÉS TERESA; GARCÍA,STELLA MARIS.
In order to establish an efficient selection criterion the variability in three asparagus populations was evaluated defining the most important yield components and analysing its evolution along three growing seasons. The yield components, coefficient of variation (CV) and the proportion of plants contributing to 80% of the total yield were estimated. The elite plants were selected by mean of total yield and clusters techniques. Multiple regression showed that spear number (SN) and spear weight (SW) were the most important yield components. In every population, total yield (TY) and SN showed the highest values of CV, independently of sex. 69% of the plants contributed to the 80% of the total yield in the first year while in the second and third year the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asparagus; Variability; Elite plants; Selection; Plant breeding.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052000000100005

Studies on probiotics properties of two lactobacillus strains
Provedor de dados: 52
Autores: Brizuela,María Antonieta; Serrano,Paulina; Pérez,Yovanka.
"In vitro" studies were carried out for the selection of Lactobacillus strains with probiotics characteristics. Two strains of Lactobacillus were evaluated for the growth specific rate, generation time, acids, bile and antimicrobial resistances. "In vitro" tests indicated that the strains presented a potential for being used as probiotics.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Probiotics; Lactobacillus; Selection.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000100013

Selection of candidate fish species for farming in the bay of Guaratuba, Brazil
Provedor de dados: 52
Autores: Bouchereau,Jean-Luc; Chaves,Paulo T.; Albaret,Jean-Jacques.
An inventory of the maximum length (ML) reached by 57 species of fishes living in the mangrove of Guaratuba, Brazil, was undertaken with an aim to evaluate the relationship between the ecosystem and the size of individuals. For each of these species, the maximum length found in the region were compared with those available in existing literature. The majority of populations presented individuals whose length reached at least 40% than the known maximum length for the species, although only 19.3% were longer than 300mm in absolute value. Population of the other species were represented only by individuals either in their initial development phases, or reduced length as compared to the maximum length known elsewhere for the same species. In this mangrove,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maximum length; Selection; Fish; Aquaculture; Mangrove.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000100003

Positive, negative and marker-free strategies for transgenic plant selection
Provedor de dados: 61
Autores: Aragão,Francisco José Lima; Brasileiro,Ana Cristina Miranda.
In this review, the use of the most common selection marker genes on plant transformation and the effects of their respective selective agents are discussed. These genes could be divided in two categories according their mode of action: genes for positive and negative selection. The retention of the marker gene flow through chloroplast transformation is also discussed. Further, strategies to recover marker-free transgenic plants, involving multi-auto-transformation (MAT), co-transformation, site-specific recombination and intragenomic relocation of transgenes through transposable elements are reviewed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibiotic resistance; Herbicide resistance; Marker genes; Plant transformation; Selection; Transgenic plant.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000100001

Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
Provedor de dados: 65
Autores: Koetz Júnior,Celso; Roso,Vanerlei Mozaquatro; Claus,Luís Afonso Marques; Oliveira,Rui Paulo Lopes de; Fávaro,Patrícia da Cruz; Borges,Marcelo Henrique Favaro; Barcellos,Júlio Otavio Jardim; Ribeiro,Edson Luís de Azambuja.
ABSTRACT: Mature weight (MW) of cows is related to the costs of their production. Usually, cows with moderate MW are more efficient in challenging environments, such as those available in the production systems in Brazil. In the present study, the selection index comprises the following traits: conformation, finishing precocity, musculature at weaning (WC, WP, WM) yearling (YC, YP and YM), scrotal circumference at yearling (SC), days to gain 160kg from birth to weaning (D160) and 240kg after weaning (D240). This are related to birth weight gain at weaning (WG) and from weaning to yearling (YG). The mature (MW) and birth weight (BW) traits were not considered in the selection index. The aim of this study was to estimate the values for the genetic trends...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Productive traits; Selection.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300652

Combining ability of tropical maize cultivars in organic and conventional production systems
Provedor de dados: 65
Autores: Oliveira,Lucimar Rodrigues de; Miranda,Glauco Vieira; DeLima,Rodrigo Oliveira; Souza,Leandro Vagno de; Galvão,João Carlos Cardoso; Santos,Izabel Cristina dos.
The objectives were to identify maize germplasm for the organic productions system and to compare the genetic effects of the grain yield of maize cultivars in organic and conventional production systems. Diallel crosses were made between six maize cultivars and the hybrid combinations were evaluated in conventional and organic production systems. The hybrid combinations produced different grain yields in the two production systems. The interaction between general combining ability and production systems was significant for grain yield, ear height and number of ears. This indicates that the additive genetic effects differ in organic and conventional production systems. The specific combining abilities (SCA) were significant for grain yield and plant height,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Breeding; Selection; Diallel; Genotype x environment interaction.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000500001

Heritability estimates for body weight and height at withers in Brazilian army horses
Provedor de dados: 65
Autores: Tamioso,Priscilla Regina; Cosmo,Tiago Rafael; Pimentel,Concepta Margaret McManus; Dias,Laila Talarico; Teixeira,Rodrigo de Almeida.
The aim of this study was to estimate the heritability for weight and height at withers of 260-780 days of age No Defined Breed (NDB) horses, at intervals of 40 days, which belong to the Brazilian Army cavalry. Thus, the model considered the direct genetic effects as random ones, as fixed, the effects of sex and year of birth and the linear effects of height at withers and age, as covariates for the analysis of body weight, whereas for the analysis of height, the linear effect of weight was included as a covariate. For the complete data, the estimated heritability coefficients were 0.40±0.034 and 0.70±0.019 for weight and height at withers, respectively, indicating that individual selection for these traits may be effective. On the other hand, for the data...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cavalry; Growth traits; Selection.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012001200023

Predicting the genetic gain in the Brazilian white maize landrace
Provedor de dados: 65
Autores: Souza,Ana Raquel Ribeiro e; Miranda,Glauco Vieira; Pereira,Messias Gonzaga; Souza,Leandro Vagno de.
The objectives of this research were to evaluate the genetic variability and predict genetic gain in the white maize landrace rescued in Barbacena, Minas Gerais, Brazil. The Brazilian maize landraces have economic and social importance for certain areas in Brazil, and research on this germplasm is very important for local food security. Three experiments were carried out with 100 half-sib progenies, in Campos dos Goytacazes, RJ, Coimbra and Barbacena, Minas Gerais, Brazil. These sites were chosen for their soil and climatic differences. An analysis of variance was significant among the progeny for all characters, indicating the presence of genetic variability between the three populations. In Campos dos Goytacazes and Coimbra, the genetic variation of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selection; Rescue; Breeding.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100004