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| Registros recuperados: 35 | |
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| Uate, Joaquim Vicente; Nunvuga, Joel Jorge; Silva, Carlos Pereira da; Guimarães, Lauro Jose Moreira; Pinho, Renzo Garcia Von; Balestre, Marcio. |
| Maize breeding programs conduct multi-environment trials every year to assess the performance of new cultivars in pre-releasing tests. The data are combined across sites and seasons to perform a joint analysis in order to obtain information that will help breeders to select the best cultivars for different environments. Beyond this, it is essential to understand the different factors that can hamper the selection and genetic progress (i.e., genetic variability, selection intensity and genotype-by-environment interactions). In this study, the genetic progress (GP) was estimated and the adaptability and stability of 81 maize genotypes were evaluated in a series of trials for the value of cultivation and use (VCU) between the 2010/11 and 2014/15 growing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mixed model; Genetic gain; Biplot.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42624 |
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| Silva, Fabiana Mota da; Pereira, Elise de Matos; Val, Bruno Henrique Pedroso; Perecin, Dilermando; Mauro, Antonio Orlando Di; Unêda-Trevisoli, Sandra Helena. |
| O sucesso dos programas de melhoramento genético depende dos procedimentos de seleção e dos métodos de melhoramento adotados para a condução das populações segregantes. O objetivo deste trabalho foi avaliar a eficiência do método Bulk com seleção em F3, (BulkF3) em relação ao método Bulk, bem como comparar qual estratégia de seleção é mais eficiente em termos de ganho genético. Para a realização do trabalho foram utilizadas 20 populações segregantes, conduzidas pelos dois métodos. Foram selecionadas 60 melhores famílias de cada método, de acordo com a performance média agronômica. O delineamento utilizado foi de blocos aumentados. Foram avaliadas as seguintes características agronômicas: altura da inserção da primeira vagem e da planta na maturidade,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia; Melhoramento genético; Genética quantitativa; Melhoramento genético; Genetic gain; Glycine max; Breeding methods; Mixed model.; Melhoramento genético. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39324 |
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| Rovaris, Sara Regina Silvestrin; Universidade Estadual de Londrina; Araújo, Pedro Mário de; Instituto Agronômico do Paraná; Garbuglio, Deoclécio Domingos; Instituto Agronômico do Paraná; Prete, Cássio Egídio Cavenaghi; Universidade Estadual de Londrina; Zago, Valquíria Sheila; Universidade Estadual de Londrina; Silva, Lucas José Ferreira da; Universidade Estadual de Londrina. |
| The objective of this study was to estimate the genetic parameters of the IPR 114 maize commercial variety for breeding purpose and the efficiency of the method. It was perfomed two cycles of half-sib progenie, between 2004 and 2007. The progenies were evaluated in a randomized complete block desing with two replications per environments and the plots were composed of one 4 m length row spaced on 0.8 m, and five plants per meter. The trials were carried out in Londrina and Ponta Grossa, Paraná State, Brazil. There were evaluated 173 and 154 progenies for selection cycles 1 and 2, respectively, analyzing the following traits: plant height, ear height, days to flower, prolificacy and predict grain yield. In both cycles verified significant genetic... |
| Tipo: Pesquisa empírica de campo |
Palavras-chave: Melhoramento Genético de plantas; Milho Zea mays L.; Progeny of maize; Genetic gain; Intrapopulacional selection Melhoramento genético Zea mays L.; Progeny of maize; Genetic gain; Intrapopulacional selection. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/8367 |
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| Uate, Joaquim Vicente; Nunvuga, Joel Jorge; Silva, Carlos Pereira da; Guimarães, Lauro Jose Moreira; Pinho, Renzo Garcia Von; Balestre, Marcio. |
| Maize breeding programs conduct multi-environment trials every year to assess the performance of new cultivars in pre-releasing tests. The data are combined across sites and seasons to perform a joint analysis in order to obtain information that will help breeders to select the best cultivars for different environments. Beyond this, it is essential to understand the different factors that can hamper the selection and genetic progress (i.e., genetic variability, selection intensity and genotype-by-environment interactions). In this study, the genetic progress (GP) was estimated and the adaptability and stability of 81 maize genotypes were evaluated in a series of trials for the value of cultivation and use (VCU) between the 2010/11 and 2014/15 growing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mixed model; Genetic gain; Biplot.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42624 |
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| Santos, Geneíldes Cristina de Jesus; Universidade Federal do Tocantins; Lopes, Fernando Brito; Universidade Federal de Goiás - UFG; Marques, Ednira Gleida; Associação Brasileira dos criadores de Zebu - ABCZ; Silva, Marcelo Corrêa da; Universidade Federal de Goiás - UFG; Cavalcante, Tânia Vasconcelos; Universidade Federal do Tocantins; Ferreira, Jorge Luis; Universidade Federal do Tocantins - UFT. |
| Effective researches assessing the efficiency of cattle herds in Northern Brazil are incipient. This study aimed to evaluate the direct additive and maternal genetic trends of weights adjusted to 205 (P205), 365 (P365) and 550 (550) days of age in Nellore animals raised on pasture, born between 1997 and 2007, from Northern Brazil. Estimative of (co)variance components used in the prediction of breeding values were obtained by derivative-free restricted maximum likelihood method (REML) using the MTDFREML program. The genetic trends of direct and maternal genetic effects were obtained by the regression of the annual average of predicted breeding values. The heritability estimates for P205, P365 and P550 were 0.33, 0.51 and 0.41, with genetic gain of 0.494,... |
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Palavras-chave: 5.04.02.00-5 (co)variância; Ganho genético; Herdabilidade; Zebu (co)variance; Genetic gain; Heritability; Zebu. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12172 |
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| OLIVEIRA,SHEILA N. DE; RIBEIRO,RICARDO P.; OLIVEIRA,CARLOS A.L. DE; ALEXANDRE FILHO,LUIZ; OLIVEIRA,ALINE M.S.; LOPERA-BARRERO,NELSON M.; SANTANDER,VICTOR F.A.; SANTANA,RENAN A.C.. |
| ABSTRACT In this paper, the existence of a genotype x environment interaction for the average daily weight in GIFT Nile tilapia (Oreochromis niloticus) in different regions in the state of Paraná (Brazil) was analyzed. The heritability results were high in the uni-characteristic analysis: 0.71, 0.72 and 0.67 for the cities of Palotina (PL), Floriano (FL) and Diamond North (DN), respectively. Genetic correlations estimated in bivariate analyzes were weak with values between 0.12 for PL-FL, 0.06 for PL and 0.23 for DN-FL-DN. The Spearman correlation values were low, which indicated a change in ranking in the selection of animals in different environments in the study. There was heterogeneity in the phenotypic variance among the three regions and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Fish; Genetic gain; Heritability; Genetic correlation.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602931 |
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| Gonçalves,Gustavo Menezes; Viana,Alexandre Pio; Pereira,Messias Gonzaga; Bezerra Neto,Francisco Valdevino; Amaral Júnior,Antônio Teixeira do; Pereira,Telma Nair Santana; Gonçalves,Tiago José Menezes. |
| The aim of this work was to study the genetic parameters, to obtaine the progenies by crossings among the yellow passion fruits cultivars (Passiflora edulis f. flavicarpa), following the Design I. The results of the variance analysis demonstrated large variability to be exploited in the population. The trait number of fruit per plant presented the largest additive genetic variation coefficient, demonstrating that larger gains could be obtained for the trait. In terms of genetic action, number of fruits per plant, skin thickness and number of days by flowering have demonstrated to be characterized by the overdominance. Other important traits seem to have presented larger addictive effect than the dominance, as weight, length and width of fruits. The highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic gain; Genetic components; Nested design; Passiflora. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300002 |
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| Suela,Matheus Massariol; Lima,Leísa Pires; Azevedo,Camila Ferreira; Resende,Marcos Deon Vilela de; Nascimento,Moysés; Silva,Fabyano Fonseca e. |
| ABSTRACT: Rice cultivation has great national and global importance, being one of the most produced and consumed cereals in the world and the primary food for more than half of the world’s population. Because of its importance as food, developing efficient methods to select and predict genetically superior individuals in reference to plant traits is of extreme importance for breeding programs. The objective of this research was to evaluate and compare the efficiency of the Delta-p, G-BLUP (Genomic Best Linear Unbiased Predictor), BayesCpi, BLASSO (Bayesian Least Absolute Shrinkage and Selection Operator), Delta-p/G-BLUP index, Delta-p/BayesCpi index, and Delta-p/BLASSO index in the estimation of genomic values and the effects of single nucleotide... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genomic prediction; Selection index; Genetic gain. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600404 |
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| Torres Morales, Braulio. |
| Para determinar el efecto de la selección recurrente para alto contenido de aceite se evaluaron tres sintéticos de maíz de grano amarillo en tres localidades del estado de Chiapas en el ciclo de temporal Primavera-Verano 2008; estos sintéticos provienen de tres ciclos de selección producto de la recombinación de las mejores 50 familias de medios hermanos (FMH). Durante el desarrollo del cultivo y al momento de la cosecha se tomaron datos de las variables agronómicas; en las tres localidades se tomaron muestras de grano de cada una de las parcelas las cuales se analizaron en laboratorio para determinar el contenido de aceite y la proporción de las estructuras en el grano. De las muestras de dos localidades también se tomó una submuestra para determinar el... |
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Palavras-chave: Selección recurrente; Ganancia genética; Contenido de aceite; Ácidos grasos; Recurrent selection; Genetic gain; Oil content; Fatty acids; Maestría; Genética. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/86 |
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| Gómez Martínez, Procoro. |
| Pinus patula Schiede ex Schltdl. et. Cham., es una especie nativa de México ampliamente utilizada en plantaciones comerciales en diferentes regiones del mundo; la especie ha sido mejorada en el extranjero, y es necesario evaluar el material al ser reintroducido a su país de origen. Se comparó el crecimiento de 36 familias de medios hermanos seleccionadas en Colombia y Sudáfrica, reintroducidas en México (grupo R) y 36 familias de medios hermanos escogidas fenotípicamente en rodales naturales (grupo N), en dos sitios con ambientes contrastantes: Aquixtla, Puebla, a 2,930 m (S1) y Acaxochitlán, Hidalgo, a 2,260 m (S2). Se midió el diámetro normal, la altura total y el volumen del fuste a los siete y ocho años de edad, y la conformación del árbol y el número... |
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Palavras-chave: Análisis de estabilidad; Correlación genética tipo B; Crecimiento; Ganancia genética; Heredabilidad; IGA; Parámetros genéticos; Pinus patula; Progenies; Reintroducción; Adaptation; Ecovalence; Genetic stability; Genetic gain; Genetic parameters; Growth rate; GEI; Heritability; Progeny test; Type-B genetic correlation; Reintroduction; Forestal; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1892 |
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| Torres Morales, Braulio. |
| Para determinar el efecto de la selección recurrente para alto contenido de aceite se evaluaron tres sintéticos de maíz de grano amarillo en tres localidades del estado de Chiapas en el ciclo de temporal Primavera-Verano 2008; estos sintéticos provienen de tres ciclos de selección producto de la recombinación de las mejores 50 familias de medios hermanos (FMH). Durante el desarrollo del cultivo y al momento de la cosecha se tomaron datos de las variables agronómicas; en las tres localidades se tomaron muestras de grano de cada una de las parcelas las cuales se analizaron en laboratorio para determinar el contenido de aceite y la proporción de las estructuras en el grano. De las muestras de dos localidades también se tomó una submuestra para determinar el... |
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Palavras-chave: Selección recurrente; Ganancia genética; Contenido de aceite; Ácidos grasos; Recurrent selection; Genetic gain; Oil content; Fatty acids; Maestría; Genética. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/86 |
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| Santos,Paulo Eduardo Telles dos; Paludzyszyn Filho,Estefano; Silva,Lorenzo Teixeira de Melo da; Vandresen,Paula Burigo. |
| Abstract The aim of this study was to evaluate Eucalyptus badjensis concerning the genetic variation for growth traits and the potential of the species in supporting a breeding programme. The field trial was a provenance/progeny test established in Campina da Alegria, Santa Catarina, Brazil (latitude 26°52′05.1″ S, longitude 51°48′47.5″ W, altitude 1,015 m) in a soil classified as Latossolic Alumino-Ferric Brown Nitosol. The experiment comprised 60 open-pollinated progenies from the provenances Glenbog and Badja State Forest, New South Wales, Australia. Ten replicates and plots with six plants in row were used. At the age of 17 years, 279 trees were assessed for diameter of the bole at breast height (DBH), total tree height (H) and volume of wood with bark... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalypt; Progeny test; Genetic parameters; Breeding; Genetic gain. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400457 |
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| NASCIMENTO FILHO, F. J. do; ATROCH, A. L.; CRAVO, M. da S.. |
| O objetivo e discriminar os clones quanto a produtividade e ao numero de colheitas baseado nos resultados referentes aos ensaios avancados, ou seja, aqueles que antecedem a recomendacao dos materiais, no periodo de 1985 a 1994. Para isso, foram realizadas analises de variancia individuais, para cada experimento, e uma analise de variancia conjuntas, para cada experimento, e uma analise combinada, envolvendo todos os clones, experimentos e anos. |
| Tipo: Livros |
Palavras-chave: Melhoramento genetico; Brasil; Amazonas; Manaus; Genetic gain; Cloning; Harvest; Colheita; Clonagem; Guaraná; Paullinia Cupana. |
| Ano: 2000 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/670823 |
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| Rodrigues,Osmar; Lhamby,Julio César Barreneche; Didonet,Agostinho Dirceu; Marchese,José Abramo. |
| The objective of this study was to assess the impact of genetic breeding on grain yield, and to identify the physiological traits associated to the increment in yield and their related growth processes, for wheat cultivars grown in Southern Brazil, in the past five decades. Seven wheat cultivars released between 1940 and 1992, were compared for physiological aspects associated with grain yield. Grain yield, biological yield, biomass partitioning, harvest index and grain yield components were also determined. The number of grains per square meter was more affected by plant breeding and was better correlated with grain yield (r = 0.94, p<0.01) than with grain weight (r = -0.39ns). The higher number of grains per square meter was better correlated with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Genetic gain; Harvest index; Yield components. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000600008 |
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| Streck,Eduardo Anibele; Magalhães Júnior,Ariano Martins de; Aguiar,Gabriel Almeida; Facchinello,Paulo Henrique Karling; Perin,Lais; Fagundes,Paulo Ricardo Reis; Oliveira,Antônio Costa de. |
| Abstract: The objective of this work was to determine the genetic progress of grain quality attributes of flooded irrigated rice (Oryza sativa) cultivars in the state of Rio Grande do Sul, Brazil, between 1972 and 2016. The genetic estimates followed an approach based on the comparative analysis of 25 cultivars released by Embrapa’s breeding program over this period. The experiment was implemented in four producing regions of the state of Rio Grande do Sul: Sul, Campanha, Planície Costeira Interna, and Planície Costeira Externa. The following significant genetic gains were observed: 0.20% per year, for percentage of whole grains after processing; -1.38% per year, for percentage of chalky kernels and white-core grains; -0.77% per year, for total chalky... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Breeding; Chalky area; Chalky kernels; Genetic gain; Industrial yield. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400453 |
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| Moura,Vicente Pongitory Gifoni; Dvorak,William Stephen. |
| Pinus caribaea var. hondurensis (Sénécl) Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-pollinated families was planted near Planaltina, Federal District, in the Cerrado Region of Brazil. The provenances tested were Poptun (Guatemala), Gualjoco, Los Limones, El Porvenir and Santa Cruz de Yojoa (Honduras) and assessed at 12 years of age. Poptun and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pinus; Selection criteria; Genetic gain; Heritability; Breeding methods. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000200003 |
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| Costa, Reginaldo Brito da; Azevedo, Luana Pâmella de Almeida; Martinez, Diego Tyszka; Tsukamoto Filho, Antonio de Arruda; Fernandes, Dayane Ávila; Oliveira, Oacy Eurico de; Resende, Marcos Deon Vilela de. |
| The study aimed to estimate parameters, values and genetic gain for growth traits in progenies of Eucalyptus camaldulensis, in the State of Mato Grosso. The progenies test was conducted under a randomized block design with 132 progenies, five replications and three plants in single rows, spaced 3 m x 2 m in Santo Antonio do Leverger, MT. At 24 months of age, progenies were evaluated for the characters: a) diameter at base height (DBH), in centimeters, b) total height, in meters, c) survival. The individual in the narrow sense heritability for the traits studied can be considered medium to high magnitude (0.13 and 0.21) for height and diameter, respectively. The heritability for survival were practically nil, due to low genetic variability among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic variability; Genetic gain; Early selection; Mixed linear model Variabilidade genética; Ganho genético; Seleção precoce; Modelo linear misto. |
| Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/337 |
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| Registros recuperados: 35 | |
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