Consulta: subjectFacets:"Genetic variation"
Registros recuperados: 107
Data/hora: 16/05/2024 08:51:41

A novel statistical method for assessing SSR variation in autotetraploid alfalfa (Medicago sativa L.)
Provedor de dados: 74
Autores: Liu,Zhi-Peng; Liu,Gong-She; Yang,Qing-Chuan.
The level of variation of simple sequence repeat (SSR) markers in cultivated alfalfa from American, Australian and Chinese sources was evaluated using a novel autotetraploid statistical method to calculate the effective number of alleles, the allele frequencies and heterozygosity. We used 19 SSR primers to screen seven polymorphic SSR loci in 320 plants from eight populations. The genetic distance and phylogenetic analysis (DISPAN) program was used to calculate the inter- and intra-population genetic relationships using the conventional binary absence/presence (0/1) method and our novel autotetraploid method. The autotetraploid method resulted in significantly higher heterozygosity (p &lt; 0.01), average effective number (p &lt; 0.01) and lower standard...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Autotetraploid; Genetic variation; Medicago sativa L.; SSR; Statistical genetics.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300015

Agrobiodiversidade de mandioca do Acre.
Provedor de dados: 14
Autores: SIVIERO, A.; LESSA, L. S.
A mandioca constitui um bom modelo de análise e estudos sobre inter-relações entre sociedade, recursos fitogenéticos e condições ecológicas por ser uma planta amplamente cultivada por populações indígenas, mestiças e colonos, sendo representada por grande número de variedades. A ligação agricultor-variedade de mandioca é um sinônimo de ligação forte entre ser humano-natureza. A compreensão deste laço é a chave para a conservação de variedades locais, um importante tesouro para o futuro. Os principais detentores de materiais silvestres e variedades crioulas de mandioca na Amazônia são as populações locais distribuídas nas diversas terras indígenas e os agricultores situados na terra firme e nas barrancas dos rios.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Yuca; Cultivares; Variación genética; Agrobiodiversity; Agrobiodiversidade; Agrobiodiversidad; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Mandioca; Manihot Esculenta; Variedade; Características Agronômicas; Variação Genética; Cassava; Cultivars; Agronomic traits; Genetic variation.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126528

Amendoim forrageiro: principais características, uso e melhoramento genético.
Provedor de dados: 14
Autores: MIQUELONI, D. P.; ASSIS, G. M. L. de.
As espécies de amendoim forrageiro (Arachis pintoi e Arachis repens) são leguminosas originárias do Brasil e, apesar da baixa adoção ainda verificada em pastagens consorciadas no país, trazem diversos benefícios para o sistema de produção, além de serem utilizadas para fins ornamentais. A variabilidade genética observada mostra o potencial para obtenção de genótipos altamente produtivos, tanto para produção pecuária, como para uso paisagístico. Dessa forma, as estratégias de melhoramento genético da espécie vêm evoluindo com o objetivo de atender às novas demandas para a cultura e assim ampliar seu cultivo e aplicações. Neste sentido, este trabalho traz informações atualizadas sobre as características, uso e práticas de melhoramento do amendoim forrageiro...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Amendoim forrageiro; Forage peanut; Cacahuetes forrajeros; Fitomejoramiento.; Leguminosas forrajeras; Cultivo mixto; Variación genética; Leguminosa Forrageira; Pastagem Consorciada; Variação Genética; Melhoramento Genético Vegetal.; Mixed cropping; Forage legumes; Genetic variation; Plant breeding.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125028

&amp;#321;egha&amp;#769;gots'enete&amp;#808; (learning together): the importance of indigenous perspectives in the identification of biological variation
Provedor de dados: 7
Autores: Polfus, Jean L.; Natural Resources Institute, University of Manitoba, Winnipeg, Manitoba, Canada; jeanpolfus@gmail.com; Manseau, Micheline; Office of the Chief Ecosystem Scientist, Parks Canada, Gatineau, Qu&amp;#233;bec, Canada; Natural Resources Institute, University of Manitoba, Winnipeg, Manitoba, Canada; Micheline.Manseau@pc.gc.ca; Bayha, Walter; De&amp;#769;l&amp;#305;&amp;#808;ne&amp;#808; Land Corporation, De&amp;#769;l&amp;#305;&amp;#808;ne&amp;#808;, Northwest Territories, Canada; nihtla321@gmail.com; Rice, Keren; Department of Linguistics, University of Toronto, Toronto, Ontario, Canada; rice@chass.utoronto.ca; Wilson, Paul; Biology Department, Trent University, Peterborough, Ontario, Canada; pawilson@trentu.ca.
Tipo: Peer-Reviewed Reports
Palavras-chave: Aboriginal; Biocultural diversity; Biodiversity; Caribou; Collaborative research; Ecology; First Nation; Genetic variation; Indigenous communities; Population genetics; Population structure; Rangifer tarandus; Resource management; Social-ecological systems; Traditional knowledge.
Ano: 2016

Analysis of preharvest sprouting in three Brazilian wheat populations
Provedor de dados: 86
Autores: Bassoi,Manoel Carlos; Flintham,John; Riede,Carlos Roberto.
The objective of this work was to evaluate the possibility of obtaining recombinant inbred wheat lines more resistant to preharvest sprouting, independently of colour genes, in three red-grained Brazilian wheat populations. The results showed statistical significance among lines within all populations, which presented a normal distribution and transgressive segregation for preharvest sprouting. The normal distribution of the lines from all red-grained populations suggests that sprouting, excluding the genes expressing seed coat pigmentation, is, probably, controlled by many genes. These findings also indicate that it may be possible to improve resistance to preharvest sprouting, independently of the colour genes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Dormancy; Grain colour; Genes; Genetic variation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000400006

Assessing Extinction Risk: Integrating Genetic Information
Provedor de dados: 7
Autores: Dunham, Jason; University of Nevada-Reno; jdunham@proaxis.com; Peacock, Mary; University of Nevada-Reno; mpeacock@scs.unr.edu; Tracy, C. Richard; University of Nevada-Reno; dtracy@unr.edu; Nielsen, Jennifer; Stanford University; jnielsen@leland.stanford.edu; Vinyard, Gary; University of Nevada-Reno; gvinyard@med.unr.edu.
Risks of population extinction have been estimated using a variety of methods incorporating information from different spatial and temporal scales. We briefly consider how several broad classes of extinction risk assessments, including population viability analysis, incidence functions, and ranking methods integrate information on different temporal and spatial scales. In many circumstances, data from surveys of neutral genetic variability within, and among, populations can provide information useful for assessing extinction risk. Patterns of genetic variability resulting from past and present ecological and demographic events, can indicate risks of extinction that are otherwise difficult to infer from ecological and demographic analyses alone. We provide...
Tipo: Peer-Reviewed Reports
Palavras-chave: Extinction risk; Genetic variation; Incidence function analysis; Population viability analysis; Ranking methods; Risk assessment; Spatial scale; Temporal scale.
Ano: 1999

Assessment of genetic diversity in the Russian olive (Elaeagnus angustifolia) based on ISSR genetic markers
Provedor de dados: 124
Autores: Asadiar,Leila Sadat; Rahmani,Fatemeh; Siami,Abbas.
Elaeagnus is a Eurasian tree with 77 species worldwide. In this study, ISSR markers were used to establish the level of genetic relationships and polymorphism across nine genotypes of Elaeagnus angustifolia collected from 9 different regions of West Azarbaijan province. The ISSR analysis with 11 anchored primers also generated 116 scorable loci, of which 92 were polymorphic (79.3%). The estimated Jaccard similarity coefficient ranged from 0.44 to 0.76 for the ISSR markers. Cluster analysis was carried out, based on the Unweighted Pair Group Method with Arithmetic Averages (UPGMA) and the dendrogram drawn with the help of the NTSYSpc 2.02 software. The analysis revealed 5 main clusters for the ISSR data. According to our results, there is a relatively high...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dendrogram; Russian olive; Genetic variation; Molecular marker.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000200013

Atypical phenotypic characteristics of klebsiella pneumoniae isolates from an outbreak in a neonatal intensive care unit in Brazil
Provedor de dados: 58
Autores: Otman,J.; Perugini,M.E.; Tognim,M.C.B.; Vidotto,M.C.
Extended-spectrum beta-Lactamase-producing (ESBL) Klebsiella sp.isolates from an outbreak in a Neonatal Intensive Care Unit (NICU) at a teaching hospital in Londrina, Paraná State, Brazil, presented atypical phenotypic characteristics that hampered their identification and the distinction between Klebsiella and Enterobacter species. Ten isolates were identified as K. pneumoniae due to negative reactions for motility and inducible beta-lactamase test (ESBL and AmpC) despite being positive for ornithyne descarboxilase. These isolates were genotyped by ribotyping and polymerase chain reaction (PCR) with repetitive extragenic palindromic sequences (REP). Ribotyping by means of an automated instrument and EcoRI and Pvu II as restriction enzymes resulted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Klebsiella pneumoniae; REP-PCR; Genetic variation; Ornithinolytic.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200016

Avaliação e caracterização de variedades locais de milho para eficiência na absorção e na utilização de fósforo.
Provedor de dados: 14
Autores: MACHADO, C. T. de T.; MACHADO, A. T.; FURLANI, A. M. C.; GUERRA, J. G. M.
RESUMO: Experimentos de campo e sob condições controladas foram conduzidos para estudar a eficiência em fósforo (P) de variedades locais de milho. Em casa de vegetação, dezoito genótipos foram cultivados em solo, sob duas doses de P, com o objetivo de verificar diferenças quanto à produção de matéria seca e utilização de P. Detectou-se variabilidade entre variedades locais para utilização de P e respostas diferenciadas a doses aplicadas. Posteriormente, índices de eficiência ao P foram estimados em dez variedades, em três concentrações de P, em solução nutritiva, e em uma dose ótima de P em campo. Confirmou-se o comportamento diferenciado das variedades para produção de matéria seca e de grãos, conteúdo de P e índices de eficiência. Na última etapa, foram...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Nutrição fosfatada; Parâmetro cinético; Maize; Phosphorus nutrition; Kinetics parameters; Enzimatic activity.; Atividade Enzimática; Fósforo; Milho; Melhoramento Vegetal; Variedade; Zea Mays.; Genetic variation; Plant breeding; Varieties.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569605

Caracterização molecular da coleção de germoplasma de ora-pro-nóbis (Pereskia spp.) da Embrapa.
Provedor de dados: 14
Autores: MORETZSOHN, M. de C.; SILVA, D. B. da; INGLIS, P. W.; CUSTÓDIO, A. R.; MADEIRA, N. R.; VIEIRA, R. F.
bitstream/item/216009/1/Boletim-Orapronobis-FINAL.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Unconventional food plant; AFLP; Hortaliça não convencional; Variabilidade genética; Genetic variation.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124941

Caracterizacao molecular e estabelecimento de colecao de trabalho de Stylosanthes macrocephala com base em marcadores RAPD.
Provedor de dados: 14
Autores: FALEIRO, F. G.; BARROS, A. M.; FALEIRO, A. S. G.; CORDEIRO, M. C. R.; KARIA, C. T.; GOMES, A. C.; ANDRADE, R. P.
bitstream/CPAC-2009/24949/1/p2004_03.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Feed legumes.; Biologia Molecular; Biotecnologia; Marcador Molecular; Leguminosa Forrageira; Variação Genética.; Genetic markers; Genetic variation; Biotechnology; Molecular biology.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567912

Caracterização morfológica de acessos coloridos de mandioca.
Provedor de dados: 14
Autores: VIEIRA, E. A.; FIALHO, J. de F.; SILVA, M. S.
O objetivo do trabalho foi caracterizar acessos de mandioca com coloração da polpa da raiz branca, creme, amarela e rosada, por meio de descritores morfológicos. O experimento foi conduzido entre 2006 e 2007, em área experimental da Embrapa Cerrados. Foram avaliados,por meio de 33 descritores morfológicos, 16 acessos de mandioca mantidos no Banco Regional de Germoplasma de Mandioca do Cerrado (BGMC), sendo 1 acesso com coloração da polpa da raiz branca, 2 com coloração da polpa da raiz creme, 4 com coloração da polpa da raiz rosada e 9 com coloração da polpa da raiz amarela. Entre os 33 caracteres qualitativos avaliados, 27 (82 %) apresentaram variabilidade, o que revela a existência de ampla divergência morfológica e a eficiência desses marcadores na...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Melhoramento genético.; Cerrado; Mandioca; Manihot esculenta; Recurso genético; Variação genética.; Cassava; Genetic resources; Genetic variation; Plant breeding.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/659443

Caracterização morfológica de acessos do gênero Stylosanthes no banco ativo de germoplasma da Embrapa Cerrados - coleção 1994/1995.
Provedor de dados: 14
Autores: KARIA, C. T.; ANDRADE, R. P. de; CHARCHAR, M. J. D'Á.; GOMES, A. C.
Resumo: A introdução de populações heterogêneas e a sua caracterização é o primeiro passo para um programa de seleção e/ou melhoramento genético de plantas. A heterogeneidade permite a seleção de indivíduos superiores que podem ser diretamente liberados como cultivares ou servir como fonte de genes em programas de melhoramento genético. A flora nativa da Região é extremamente rica em leguminosas, sendo, inclusive, centro de origem de diversas espécies que poderiam ser usadas como forrageiras. Dentre as leguminosas nativas, destaca-se o gênero Stylosanthes que possui diversas espécies, amplamente, distribuídas pelo continente americano, apresentando grande variação de formas e tipos, resultante da evolução de populações submetidas às diferentes condições de...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Stilosante; Feed legumes.; Cerrado; Germoplasma; Leguminosa Forrageira; Melhoramento Genético Vegetal; Morfologia Vegetal; Variação Genética.; Germplasm; Genetic variation; Plant anatomy; Plant breeding.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567951

Caracterização morfológica do banco ativo de germoplasma de mandioca da Embrapa Cerrados.
Provedor de dados: 14
Autores: VIEIRA, E. A.; FIALHO, J. de F.; FALEIRO, F. G.; FUKUDA, W. M. G.; JUNQUEIRA, N. T. V.
bitstream/CPAC-2009/26792/1/p2005_04.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Germoplasma; Manihot Esculenta; Mandioca; Melhoramento Genético Vegetal; Variação Genética.; Germplasm; Genetic variation; Cassava; Plant breeding.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569415

Characterization of mandarin citrus germplasm from Southern Brazil by morphological and molecular analyses
Provedor de dados: 86
Autores: Koehler-Santos,Patrícia; Dornelles,Ana Lúcia Cunha; Freitas,Loreta Brandão de.
The objective of this work was to characterize mandarin (Citrus spp.) germplasm from Southern Brazil by morphological and molecular analyses. Thirty seven cultivars from 34 distinct mandarin varieties were evaluated by morphological and agronomic traits of leaves, flowers and fruits, and by microsatellite markers. The morphological and agronomic characteristics suggested that almost all varieties can be produced for commercial use, and some, as the Satsuma variety, are recommended for breeding programs. Pooled DNA samples from 1-5 plants belonging to each cultivar were tested. Eight of the nine primers detected polymorphisms. Specific markers were found for some accessions. The dendrogram constructed with the morphological results divided the 37 cultivars...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus; Genetic variation; Microsatellites; Breeding methods.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000700003

Collection, Characterization and Use of Genetic Bariation in Chilean Bean Germplasm (Phaseolus vulgaris L.)
Provedor de dados: 113
Autores: Bascur B.,Gabriel; Tay U.,Juan.
Recently performed studies on the type of seed protein present from several origins and their morphological traits have shown that the common bean (Phaseolus vulgaris L.) is native to America, being a species without a specific center of origin and with two areas of domestication: Central America and South America. In this last center, three strains were determined, one of them is called "the Chilean strain", which as noted is a sub-center of genetic diversity for this species. With the purpose of collecting and preserving the genetic diversity present in the Chilean ecotypes, a germplasm collection was made, from Arica to Chiloe, visiting 207 locations in 28 expeditions and collecting 1239 accessions. This material was seeded in two Regional Center of...
Tipo: Journal article
Palavras-chave: Germplasm; Chilean strain; Genetic variation; Morphologic characterization; Phaseolus vulgaris L.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072005000200003

Combining ability of twelve maize populations
Provedor de dados: 86
Autores: Vacaro,Elton; Barbosa Neto,José Fernandes; Pegoraro,Diego Girardi; Nuss,Claudio Natalino; Conceição,Leo Duc Haa.
Genetic progress depends on germplasm quality and breeding methods. Twelve maize populations and their crosses were evaluated to estimate combining ability and potential to be included as source populations in breeding programs. Plant height, point of insertion of the first ear, number of ears per plant, number of grains per ear, root and stalk lodging and grain yield were studied in two locations in Brazil, during the 1997/98 season. Genotype sum of squares was divided into general (GCA) and specific (SCA) combining ability. Results indicated the existence of genetic divergence for all traits analyzed, where additive effects were predominant. The high heterosis levels observed, mainly in Xanxerê, suggested the environmental influence on the manifestation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Germplasm; Heterosis; Genetic variation.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000100009

Comparative genetic diversity and genetic structure of three chinese silkworm species Bombyx mori L. (Lepidoptera: Bombycidae), Antheraea pernyi Guérin-Meneville and Samia cynthia ricini donovan (Lepidoptera: Saturniidae)
Provedor de dados: 82
Autores: Liu,Yan-Qun; Qin,Li; li,Yu-Ping; Wang,Huan; Xia,Run-Xi; Qi,Yong-Hong; li,Xi-Sheng; Lu,Cheng; Xiang,Zhong-Huai.
The genetic diversity and genetic structure of three Chinese silkworm species Bombyx mori L., Antheraea pernyi Guérin-Meneville and Samia cynthia ricini Donovan were comparatively assessed based on RAPD markers. At the species level, A. pernyi and B. mori showed high levels of genetic diversity, whereas S. cynthia ricini showed low level of genetic diversity. However, at the strain level, A. pernyi had relatively highest genetic diversity and B. mori had lowest genetic diversity. Analysis of molecular variance (AMOVA) suggested that 60% and 72% of genetic variation resided within strains in A. pernyi and S. cynthia ricini, respectively, whereas only 16% of genetic variation occurred within strains in B. mori. In UPGMA dendrogram, individuals of A. pernyi...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: RAPD; Genetic variation; AMOVA; Dendrogram.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600019

Coping with genetic diversity: the contribution of pathogen and human genomics to modern vaccinology
Provedor de dados: 56
Autores: Lemaire,D.; Barbosa,T.; Rihet,P.
Vaccine development faces major difficulties partly because of genetic variation in both infectious organisms and humans. This causes antigenic variation in infectious agents and a high interindividual variability in the human response to the vaccine. The exponential growth of genome sequence information has induced a shift from conventional culture-based to genome-based vaccinology, and allows the tackling of challenges in vaccine development due to pathogen genetic variability. Additionally, recent advances in immunogenetics and genomics should help in the understanding of the influence of genetic factors on the interindividual and interpopulation variations in immune responses to vaccines, and could be useful for developing new vaccine strategies....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Human vaccines; Vaccinomics; Genetic variation; Immunization.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000500001

Demarcation of informative chromosomes in tropical sweet corn inbred lines using microsatellite DNA markers
Provedor de dados: 74
Autores: Kashiani,Pedram; Saleh,Ghizan; Panandam,Jothi Malar; Abdullah,Nur Ashikin Psyquay; Selamat,Ahmad.
A study of genetic variation among 10 pairs of chromosomes extracted from 13 tropical sweet corn inbred lines, using 99 microsatellite markers, revealed a wide range of genetic diversity. Allelic richness and the number of effective alleles per chromosome ranged from 2.78 to 4.33 and 1.96 to 3.47, respectively, with respective mean values of 3.62 and 2.73. According to the Shannon's information index (I) and Nei's gene diversity coefficient (Nei), Chromosome 10 was the most informative chromosome (I = 1.311 and Nei = 0.703), while Chromosome 2 possessed the least (I = 0.762 and Nei = 0.456). Based on linkage disequilibrium (LD) measurements for loci less than 50 cM apart on the same chromosome, all loci on Chromosomes 1, 6 and 7 were in equilibrium. Even...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microsatellite; Inbred line; Chromosome; Genetic variation; Linkage disequilibrium.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400012

Densidade básica da madeira de espécies de Pinus tropicais determinada através de métodos não-destrutivos.
Provedor de dados: 14
Autores: MOURA, V. P. G.; SANTIAGO, J.
bitstream/item/75929/1/bolpd-33.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Densidade; Woody; Pines; Região tropical; Teste de procedência.; Cerrado; Madeira; Método; Procedência; Pinheiro; Variação Genética.; Pinus; Genetic variation; Density; Provenance.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547940

Differentiation of free-ranging chicken using discriminant analysis of phenotypic traits
Provedor de dados: 96
Autores: Al-Atiyat,Raed M.; Aljumaah,Riyadh S.; Abudabos,Alaeldein M.; Alotybi,Masoud N.; Harron,Raafat M.; Algawaan,Abdulaziz S.; Aljooan,Hassan S.
ABSTRACT In this study, we investigated the differentiation of five different chicken ecotypes - Center, North, South, West, and East - of Saudi Arabia using discriminate analysis. The analysis was based on nine important morphological and phenotypic traits: body color, beak color, earlobe color, eye color, shank color, comb color, comb type, comb size, and feather distribution. There was a strong significant relationship between the phenotype and effect of geographic height in terms of comb type and earlobe color in males as well as body, beak, eye, and shank color. In particular, the comb type and earlobe color differentiated the ecotypes of males. Among the females, the beak, earlobe, eye, shank color, and feather distribution had more differentiating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Genetic distance; Genetic variation; Indigenous; Morphology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001000791

Diversidade genética de acessos comerciais e silvestres de maracujazeiro-doce com base em marcadores RAPD.
Provedor de dados: 14
Autores: BELLON, G.; FALEIRO, F. G.; JUNQUEIRA, K. P.; PAULA, M. da S.; BRAGA, M. F.; JUNQUEIRA, N. T. V.; PEIXOTO, J. R.
bitstream/CPAC-2009/27710/1/p2006_43.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maracujá; Marcador Molecular; Melhoramento Genético Vegetal; Passiflora Edulis; Variação Genética.; Genetic variation; Genetic markers; Plant breeding.; Passion fruits.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/544610

Diversidade genética de espécies de passiflora, potenciais fontes de resistência a doenças, com base em marcadores RAPD.
Provedor de dados: 14
Autores: PAULA, M. da S.; FALEIRO, F. G.; JUNQUEIRA, K. P.; BELLON, G.; JUNQUEIRA, N. T. V.; BRAGA, M. F.; PEIXOTO, J. R.
bitstream/CPAC-2009/27709/1/p2006_42.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maracujá; Marcador Molecular; Melhoramento Genético Vegetal; Passiflora Edulis; Variação Genética.; Genetic variation; Genetic markers; Plant breeding.; Passion fruits.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/544599

Diversidade genetica de especies silvestres de maracujazeiro com resistencia multipla a doencas com base em marcadores RAPD.
Provedor de dados: 14
Autores: FALEIRO, F. G.; JUNQUEIRA, N. T. V.; BELON, G.; BORGES, T. A.; ANJOS, J. de R. N. dos; PEIXOTO, J. R.; BRAGA, M. F.; SANTOS, D. G.
bitstream/CPAC-2009/24951/1/p2004_05.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Plant diseases.; Biotecnologia; Doença de Planta; Marcador Molecular; Maracujá; Marcador Genético; Passiflora Edulis; Variação Genética; Variedade Resistente.; Biotechnology; Genetic markers; Genetic variation; Disease resistance; Passion fruits.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567929

Diversidade genetica de uma colecao de trabalho de Stylosanthes guianensis com base em marcadores RAPD.
Provedor de dados: 14
Autores: FALEIRO, F. G.; KARIA, C. T.; ANDRADE, R. P.; BARROS, A. M.; SILVA, D. de O. C. e.
bitstream/CPAC-2009/24950/1/p2004_04.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Feed legumes.; Leguminosa Forrageira; Marcador Genético; Marcador Molecular; Melhoramento Genético Vegetal; Variação Genética.; Genetic variation; Genetic markers; Biotechnology; Plant breeding.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567917

Diversidade genética de variedades comerciais de maracujazeiro-azedo com base em marcadores moleculares.
Provedor de dados: 14
Autores: FALEIRO, F. G.; JUNQUEIRA, N. T. V.; BRAGA, M. F.; BELLON, G.; PEIXOTO, J. R.
bitstream/CPAC-2009/27708/1/p2006_41.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Biotecnologia; Maracujá; Marcador Molecular; Marcador Genético; Passiflora Edulis; Variação Genética.; Genetic markers; Biotechnology; Genetic variation; Passion fruits.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/544592

Diversidade genética em cultivares de arroz.
Provedor de dados: 14
Autores: CARGNIN, A.; SOUZA, M. A. de.
RESUMO: O objetivo deste trabalho foi estimar a diversidade genética das cultivares de arroz mais utilizadas em cultivo no período de 1950 a 2001. Foram conduzidos dois experimentos de campo, nas localidades denominadas Aeroporto e Agronomia, ambas pertencentes à Universidade Federal de Viçosa, em Viçosa, MG. Os experimentos foram conduzidos no delineamento de blocos ao acaso com três repetições. Avaliaram se as 25 cultivares mais plantadas no período de 1950 a 2001. Foram coletados e analisados os dados referentes a produção de grãos, altura das plantas, dias para a floração, estande inicial, estande final, perfilhamento útil, grãos por panícula, percentagem de espiguetas estéreis por panícula e peso médio de grão. As cultivares Guarani e Bico Ganga foram...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Arroz; Melhoramento Genético Vegetal; Oryza Sativa; Variedade.; Variação Genética; Genetic variation; Plant breeding; Rice; Varieties.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572282

Diversity of group A rotavirus genes detected in the Triângulo Mineiro region, Minas Gerais, Brazil
Provedor de dados: 58
Autores: Dulgheroff,Ana Carolina Bernardes; Silva,George Allan Villarouco da; Naveca,Felipe Gomes; Oliveira,Adriana Gonçalves de; Domingues,André Luiz da Silva.
ABSTRACT Group A rotaviruses are the main causative agent of infantile gastroenteritis. The segmented nature of the viral genome allows reassortment of genome segments, which can generate genetic variants. In this study, we characterized the diversity of the VP7, VP4 (VP8*), VP6, NSP4, and NSP5 genes of the rotaviruses that circulated from 2005 to 2011 in the Triângulo Mineiro (TM) region of Brazil. Samples with genotypes G2 (sublineages IVa-1 and IVa-3), G1 (sublineage I-A), G9 (lineage III), G12 (lineages II and III), G8 (lineage II), G3 (lineage III), P[4] (sublineages IVa and IVb), P[8] (sublineages P[8]-3.6, P[8]-3.3, and P[8]-3.1), I2 (lineage VII), E2 (lineages VI, XII, and X), and H2 (lineage III) were identified. The associations found in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rotavirus; Infantile diarrhea; Genotype; Genetic variation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000300731

DNA barcode regions for differentiating Cattleya walkeriana and C. loddigesii
Provedor de dados: 3
Autores: Rivera-Jiménez, Hernando; Rossini, Bruno César; Tambarussi, Evandro Vagner; Ann Veasey, Elizabeth; Ibanes, Bruna; Marino, Celso Luis.
 Growers appreciate Cattleya walkeriana and C. loddigesii due to striking shape and rarity. Thus, this study aimed to evaluate the feasibility of DNA barcode regions, namely ITS1, ITS2 and rpoC1, to discriminate between C. walkeriana and C. loddigesii species. DNA barcode regions were successfully amplified using primers designed to amplify plants. We also included sequences from public databases in order to test if these regions were able to discriminate C. walkeriana and C. loddigesii from other Cattleya species. These regions, and their combinations, demonstrated that the ITS1+ITS2 had the highest average interspecific distance (11.1%), followed by rpoC1 (1.06%). For species discrimination, ITS1+ITS2 provided the best results. The combined data set of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.00.00.00-6 orchid improvement; Genetic variation; Species separation. 2.02.03.00-4.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/33024

Downy mildew incidence on pearl millet cultivars and pathogenic variability among isolates of Sclerospora graminicola in Rajasthan
Provedor de dados: 30
Autores: Rao, V.P.
Palavras-chave: Millets; Hybrids; Data analysis; Fungi; Pathogens; Genetic variation; Replication; Humus; Wet season; Land resources.
Ano: 2005
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3235

EARLY GROWTH AND SEEDLING MORPHOLOGY OF SPECIES OF Sesbania Scop. (Leguminosae, robinieae)
Provedor de dados: 63
Autores: Veasey,Elisabeth Ann; Negrão,Marta Organo; Martins,Paulo Sodero; Bandel,Gerhard.
The objective of this study was to characterize 17 accessions of Sesbania, representing S. exasperata, S. grandiflora, S. sesban, S. tetraptera and S. virgata at the seedling stage, and to evaluate the initial development during the first two months after planting. The trial was conducted in a greenhouse in a randomized block design, with 4 replications and 5 plants per plot. The traits recorded were: plant height (PH), from four observations at 15-day intervals, at 17, 32, 47 and 62 days after planting; length of hypocotyl (LH) and epicotyl (LEP); length (LE1) and width (WE1) of the first eophyll; and number of leaflet pairs of the second metaphyll (NLP), evaluated 17 days after planting. Univariate analyses of variance were performed, estimating the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sesbania; Seedling morphology; Genetic variation; Early growth.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000200011

Eco-genetic study on water hyacinth, Eichhornia crassipes (Mart.) Solms, the world's most invasive aquatic plant
Provedor de dados: 111
Autores: El-Shahawy, Tarek Abd El-Ghafar.
Water hyacinth is a complicated, multifaceted problem disturbs all interested and concerned entities in aquatic weed management. Water hyacinth, which is the world's most aggressive and destructive aquatic freshwater species, extends over vast areas of the world creating serious ecological and cultural problems. So far, water quality does not represent a dilemma against water hyacinth growth. The objective of the current work is to study the potential genetic differences between water hyacinth populations growing under different aquatic ecosystems in Egypt. Water and plant samples were collected from three different sites namely irrigation water, drainage water and sewage water at Al-Buhayrah Governorate, Damanhour District. The physicochemical properties...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Botany; Weed biology and control Aquatic weeds; Aquatic ecosystems; Genetic variation; Heavy metals; Invasive plants; Water quality.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4392

Efecto del estrés hídrico y por altas temperaturas sobre algunas características de crecimiento, distribución de biomasa y composición isotópica de carbono de poblaciones de Pinus pinceana
Provedor de dados: 32
Autores: Martiñón Martínez, Rodrigo Julián.
Con el propósito de determinar las posibilidades de adaptación de Pinus pinceana Gord. a condiciones ambientales asociadas al cambio climático, conocer algunos de los mecanismos fisiológicos involucrados e identificar poblaciones con una mejor respuesta a dichas condiciones, se evaluó el efecto del estrés por sequía y por temperatura sobre el crecimiento, distribución de biomasa, composición isotópica de carbono (δ13C), y tasa relativa de crecimiento (TRC) en plantas de diferentes poblaciones bajo condiciones de invernadero. El diseño experimental incluyó dos ambientes de temperatura, con una diferencia promedio de 2 ºC y dos condiciones de disponibilidad de agua. Los dos factores de estrés ocasionaron una reducción en el crecimiento, la acumulación de...
Tipo: Tesis
Palavras-chave: Adaptación; Cambio climático; Distribución de biomasa; Relación parte aérea-raíz; Variación genética; Δ13C; Eficiencia en el uso del agua; Tasa relativa de crecimiento; Maestría; Forestal; Adaptation; Climate change; Biomass allocation; Shoot-root ratio; Genetic variation; Δ13C; Water use efficiency; Relative growth rate.
Ano: 2009
URL: http://hdl.handle.net/10521/1360

Efecto del estrés hídrico y por altas temperaturas sobre algunas características de crecimiento, distribución de biomasa y composición isotópica de carbono de poblaciones de Pinus pinceana
Provedor de dados: 32
Autores: Martiñón Martínez, Rodrigo Julián.
Con el propósito de determinar las posibilidades de adaptación de Pinus pinceana Gord. a condiciones ambientales asociadas al cambio climático, conocer algunos de los mecanismos fisiológicos involucrados e identificar poblaciones con una mejor respuesta a dichas condiciones, se evaluó el efecto del estrés por sequía y por temperatura sobre el crecimiento, distribución de biomasa, composición isotópica de carbono (δ13C), y tasa relativa de crecimiento (TRC) en plantas de diferentes poblaciones bajo condiciones de invernadero. El diseño experimental incluyó dos ambientes de temperatura, con una diferencia promedio de 2 ºC y dos condiciones de disponibilidad de agua. Los dos factores de estrés ocasionaron una reducción en el crecimiento, la acumulación de...
Tipo: Tesis
Palavras-chave: Adaptación; Cambio climático; Distribución de biomasa; Relación parte aérea-raíz; Variación genética; Δ13C; Eficiencia en el uso del agua; Tasa relativa de crecimiento Adaptation; Climate change; Biomass allocation; Shoot-root ratio; Genetic variation; Δ13C; Water use efficiency; Relative growth rate.
Ano: 2012
URL: http://hdl.handle.net/10521/1032

Enzymatic analysis in Anopheles nuneztovari Gabaldón (Diptera, Culicidae)
Provedor de dados: 57
Autores: SCARPASSA,V. M.; TADEI,W. P.
Enzymatic analysis in Anopheles nuneztovari was made using four populations from the Brazilian Amazon and two from Colombia. The enzymes ME and XDH presented a monomorphic locus in all of the studied populations. EST and LAP presented a higher number of loci. In EST, genetic variation was observed in the five loci; LAP presented four loci, with allec variation in two loci. In IDH, three activity regions were stained, with genetic variation for locus Idh-1 in the Brazilian Amazon populations. A locus for MDH was observed, with genetic variation in the six populations. A region was verified for ACON, with four alleles in Sitronela and three in the other populations. PGM constituted one locus, with a high variability in the Brazilian Amazon populations. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isozymes; Electrophoretic profiles; Genetic variation; Neotropical anopheline; Amazonian.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400002

Estrategia de uso y conservación del germoplasma de Vanilla planifolia Jack. en la región Totonacapan Puebla-Veracruz.
Provedor de dados: 32
Autores: Salazar Rojas, Víctor Manuel.
La planificación estratégica para el uso y conservación de Vanilla planifolia Jack. en México requiere del análisis integral y detallado de los aspectos que determinan y afectan su variación genética. Por tal razón, se planteó conocer la variación en el contenido de los compuestos fitoquímicos que definen la calidad aromática del germoplasma vainilla mediante HPLC, identificar variación genética a nivel infra-específico a través de 14 loci microsatélites y estudiar los criterios de valoración que determinan la actitud de los usuarios de vainilla entorno al uso y conservación del germoplasma en la región Totonacapan México, mediante el método de análisis multiatributo AHP (Analytic Hierarchy Process). Los resultados mostraron la existencia de seis grupos...
Palavras-chave: Aroma; Domesticación; Planeación estratégica; Variación genética; Variación quimiotípica; Valoración social; Chemotypical variation; Domestication; Genetic variation; Social valuation; Strategic planning; EDAR; Estrategias para el Desarrollo Agrícola Regional; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/609

Evaluation of dry matter yield and essential oil production in 84 accessions of Tanacetum polycephalum Sch.Bip. through multivariate analyses
Provedor de dados: 109
Autores: Alizadeh,Mohammad Ali; Zehtabchi,Fatemeh; Jafari,Ali Ashraf.
Abstract In order to investigate diversity and explain the relationships of essential oil yield with morphological traits, 84 populations T. polycephalum, were sown in the field using randomized complete blocks design (RCBD) with three replicates in Research Institute of Forest and Rangeland, Tehran, Iran in 2013-2014. Data were collected for flowering date, growth degree days (GDD), stem number, plant height, dry matter (DM) yield, essential oil percentage, and essential oil yield. The relationships among traits were determined using correlation, regression and factor analysis. The genetic distance and genotype classification were determined using cluster analysis. DM yield was positively correlated with plant height, canopy cover, stem number and oil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Early flowering date; Genetic variation; Phenotypic correlations; Morphological traits; Plant genetic resources.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100177

Evaluation of medium maturity, high-tillering Pearl Millet population diallel in Niger
Provedor de dados: 30
Autores: Haussmann, B.I.G.
Palavras-chave: Genetic techniques; Population genetics; Crossing over; Millets; Grain; Breeds (animals); Heritability; Genetic variation; Yields; Hybrids.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3205

Evidence of lack of population substructuring in the Brazilian freshwater fish Prochilodus costatus
Provedor de dados: 74
Autores: Carvalho-Costa,Luis F.; Hatanaka,Terumi; Galetti Jr.,Pedro M.
Curimbatá-pióa (Prochilodus costatus Valenciennes, 1850) is an endemic species from the São Francisco River Basin with migratory habits, important ecological role in the ecosystem and relevant fishing importance. The present study aimed to assess the genetic variation in P. costatus in order to investigate its population genetic structure. Genetic variation was studied at three sites downstream the Três Marias dam (Upper-middle São Francisco River, State of Minas Gerais) through six specific microsatellite loci. Fish from the three sites had quite similar genetic diversity levels and no genetic differentiation was detected, suggesting that P. costatus might represent a single reproductive unit in the studied area. Alternatively, the present study was not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prochilodontidae; Curimbatá; Microsatellites; Genetic variation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200036

Extreme homogeneity among Brazilian wheat genotypes determined by RAPD markers
Provedor de dados: 86
Autores: FREITAS,LORETA BRANDÃO DE; JERUSALINSKY,LEANDRO; BONATTO,SANDRO LUIS; SALZANO,FRANCISCO MAURO.
Random amplified polymorphic DNA markers (RAPD) were used to estimate the variability of 14 genotypes of Brazilian wheat (Triticum aestivum L.), using a set of 50 random 10mer primers. A total of 256 reproducibly scorable DNA amplification products were obtained from 48 of the primers, 83% of which were polymorphic. Genetic distances among genotypes were calculated and a dendrogram and a principal coordinates analysis showing the genetic relationships among them were obtained. Despite the low variability found (average genetic distance of 27%), two groups of genotypes could be identified, which probably reflect how they were formed. Studies such as this one may be important in the planning and development of future improvement programs for this plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Genetic variation; Polymorphism; Breeding methods.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001100018

Genetic distance between broodstocks of the marine shrimp Litopenaeus vannamei (Decapoda, Penaeidae) by mtDNA analyses
Provedor de dados: 74
Autores: Francisco,Ana Karina de; Galetti Junior,Pedro Manoel.
In the constantly growing Brazilian shrimp industry the evaluation of genetic relationships between broodstocks is an useful tool for shrimp culture management programs. We established the genetic relationships between five broodstocks of the white marine shrimp Litopenaeus vannamei (Penaeidae) based on the sequencing of the mtDNA 16S rRNA and cytochrome oxidase I (COI) regions. Although no divergence was found between the broodstocks for the highly conservative 16S rRNA gene, we did find an 8.2% distance between L. vannamei and the Farfantepenaeus subtilis. Analyses of the COI region showed genetic distances of only 0.2 to 1% between the broodstocks, which contrasted with the 10.9% mean distance found between L. vannamei and F. subtilis. The small genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shrimp; Litopenaeus vannamei; Genetic variation; MtDNA.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200014

Genetic divergence of Anthurium affine germplasm using morphoagronomic and molecular descriptors
Provedor de dados: 124
Autores: Maia,Clara Yohana; Soares,Nazaré Suziane; Castro,Ana Cecília Ribeiro; Queirós,João Ravelly Alves de; Aragão,Fernando Antonio Souza de; Bordallo,Patricia do Nascimento.
ABSTRACT Anthurium affine is an ornamental Brazilian native plant very appreciated due to its long-lasting durability. To explore the genetic diversity available, 21 A. affine half-sibling progeny were evaluated using morphoagronomic and molecular descriptors. The morphoagronomic descriptors used were: plant height, plant diameter, growth habit, leaf number, leaf blade length, leaf blade width, petiole length, petiole diameter, leaf margin undulation, general appearance; soil cover rate and Random Amplified Polymorphic DNA (RAPD) markers the molecular one. All the descriptors within the progeny showed variability and general appearance, leaf margin undulation and soil cover rate are the ones that most contribute to the plants divergence. From 45 RAPD...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clustering; Characterization; Genetic variation; Ornamental; RAPD.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400410

Genetic diversity between native and improved Cattleya walkeriana Gardner famous clones
Provedor de dados: 1
Autores: Tambarussi, Evandro Vagner; Ann Veasey, Elizabeth; Menezes, Lou; Ibañes, Bruna; Lombardi, Kátia Cylene; Vencovsky, Roland.
The aim of this study was to evaluate the genetic diversity among native plants and some individuals obtained from crosses with unknown genealogy of C. walkeriana as well as C. loddigesii and C. nobilior and to advance towards solving the question of the genetic purity of the “Orchidglade” clone. Eight microsatellite loci were used to evaluate the genetic diversity between individuals of C. walkeriana. Microsatellites were not efficient in determining the genetic diversity between C. walkeriana groups (native and improved). The difficulty in determining the genetic distance between the different genotypes can be attributed to the complex mating system of the species and to a weak genetic barrier that facilitates the development of hybrids. Our analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.02.03.00-4 orchid improvement; Genetic variation; Genetic differentiation; Cattleya loddigesii; Cattleya nobilior; Melhoramento vegetal.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32520

Genetic diversity of Plasmodium vivax and Plasmodium falciparum in Kohat District, Pakistan
Provedor de dados: 55
Autores: Khatoon,Lubna; Khan,Inam Ullah; Shah,Shahid Ali; Jan,Muhammad Ishtiaq; Ullah,Farhat; Malik,Salman Akbar.
Malaria is one of the serious diseases threatening human health in Pakistan and contributes to a large proportion of the total malaria deaths in South Asia. However, little is known about the nature and extent of genetic diversity of the malarial parasites circulating in Pakistan. This study was designed to assess the infection status of Plasmodium and the genetic diversity of Plasmodium vivax and Plasmodium falciparum by analyzing msp-3α, msp-3β and msp-1, msp-2 genes respectively using allele specific nested PCR and RFLP assays. For this purpose, 130 field isolates were collected from the individuals who exhibited clinical symptoms associated with malaria in the Kohat region of Khyber Pakhtoonkhwa (KPK), Pakistan. Among 130 blood samples collected, P....
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Plasmodium vivax; Plasmodium falciparum; Genetic variation; Pakistan.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000200014

Genetic parameters for germination characters in twenty promising progenies of a çaizeiro for palm heart production
Provedor de dados: 190
Autores: Oliveira, Maria do Socorro Padilha de; Farias Neto, João Tomé de; Nascimento, Walnice Maria Oliveira do.
Germination of half-sib progenies of Euterpe oleracea Mart., promising for palm heart production were studied. A cluster with seeds of each progenie was selected at Embrapa Experimental Sation placed in Eastern Amazonia. Fruits were immersed in warm water and the chosen seeds were sown immediately. Randomized blocks design with 25 treatments (progenies), three repetitions and parcels of 100 seeds were utilized. Evaluation of the following characters were made: days for beginning (IG) and end (FG), average time (TM) and percentage (PG) of germination. Progenies presented genetic differences for germination characters. Beginning of germination (IG) and the average time (TM) showed the biggest estimates of heritability related to b index.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heritability; Genetic variation; Euterpe oleracea; Breeding Herdabilidade; Variação genética; Euterpe oleracea; Melhoramento.
Ano: 2003
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1623

Genetic Variability Between two provenances of açaizeiro (Euterpe oleracea Martus)
Provedor de dados: 190
Autores: Farias Neto, João Tomé de; Müller, Antônio Agostinho; Oliveira, Maria do Socorro Padilha de; Santo, Dewis Eduardo Silva do Espirito; Silva, Mirna Rafaela Almeida da.
The objective of this work is to generate information about the distribution of the levels of genetic variability in two provenances of Euterpe oleracea. A sample of seeds of each individual from distinct regions had been collected at Curralinho and Limoeiro of Ajuru, localities of Pará State placed on the Estuary of Amazon river. The experiment was installed in randomized blocks with two replications and five plants per plot. Seedlings were evaluated, at 10 months of age for: height, diameter and number of leaves. Significant genetic variations between provenances for number of leaves were detected. Curralinho provenance presented greater genetic variability than Limoeiro do Ajuru. Small levels of coefficients of genetic variation among provenances shows...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic variation; Natural populations; Genetic parameter Variação genética; Populações naturais; Parâmetros genéticos.
Ano: 2003
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1622

Genetic variability for cold tolerance in pigeonpea
Provedor de dados: 30
Autores: Sandhu,J.S.
Palavras-chave: Pigeonpeas; Genotypes; Tolerance; Genetic variation; Temperature; Chickpeas; Germplasm; Genetic resources; Genetics; Freezing.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3340

Genetic variability in four samples of Neoplecostomus yapo (Teleostei: Loricariidae) from the rio Paranapanema basin, Brazil
Provedor de dados: 83
Autores: Philippsen,Juliana S.; Renesto,Erasmo; Gealh,Ana Maria; Artoni,Roberto F.; Shibatta,Oscar A.; Zawadzki,Claudio H.
Four samples of Neoplecostomus yapo were analyzed through the allozyme electrophoresis technique in corn starch gel. The allozyme pattern was similar to those found in N. paranensis with 24 loci scored. Two samples (ribeirão Atlântico and ribeirão Uraí) showed monomorphic bands for all 24 loci, whereas the other two (rio Verde and rio Fortaleza) showed 8.3% of polymorphic loci. The He genetic variability estimates for the rios Verde and Fortaleza populations were 0.0195 and 0.0179, respectively, too much inferior to the mean heterozygosity summed to species from the whole world (0.051). The Wright statistical values F IS = 0.5181, F IT = 0.5681 and F ST = 0.1039 and the genetic distance of Nei values showed that the four samples are genetically very...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allozymes; Genetic variation; Neoplecostominae; Neotropical fishes; Siluriformes.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100004

Genetic variability in the Skyros pony and its relationship with other Greek and foreign horse breeds
Provedor de dados: 74
Autores: Bömcke,Elisabeth; Gengler,Nicolas; Cothran,E. Gus.
In Greece, seven native horse breeds have been identified so far. Among these, the Skyros pony is outstanding through having a distinct phenotype. In the present study, the aim was to assess genetic diversity in this breed, by using different types of genetic loci and available genealogical information. Its relationships with the other Greek, as well as foreign, domestic breeds were also investigated. Through microsatellite and pedigree analysis it appeared that the Skyros presented a similar level of genetic diversity to the other European breeds. Nevertheless, comparisons between DNA-based and pedigree-based results revealed that a loss of genetic diversity had probably already occurred before the beginning of breed registration. Tests indicated the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic variation; Genetic markers; Pedigree; Horse.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100013

Genetic variability of mango (Mangifera indica L.) cultivars used in the Embrapa Cerrados breeding program using RAPD markers.
Provedor de dados: 14
Autores: FALEIRO, F. G.; PINTO, A. C. Q.; CORDEIRO, M. C. R.; RAMOS, V. H. V.; BELLON, G.; ANDRADE, S. R. M.; PINTO, J. F. N.
bitstream/CPAC-2009/24954/1/p2004_07.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Melhoramento genetico; RAPD; Mango.; Biotecnologia; Cerrado; Marcador Molecular; Manga; Mangifera Indica; Marcador Genético; Método de Melhoramento; Variação Genética.; Genetic variation; Breeding methods; Genetic markers; Biotechnology; Plant breeding.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/566512

Genetic variation among and within tritipyrum (Thinopyrum bessarabicum x Triticum durum) lines using PCR-based molecular markers
Provedor de dados: 118
Autores: Siahsar,Barat Ali; Allahdoo,Maryam; Shahsevand Hassani,Hossein.
Primary hexaploid tritipyrum lines are amphiploids between Triticum durum and Thinopyrum bessarabicum, which can set seed in at least 250 mM NaCl. Genetic variation within and among 14 lines of primary tritipyrum were investigated by using 2 random and 6 semi random primers that produced clear and reproducible DNA amplicons. Average values for Nei's gene diversity (h) and Shannon indices (I) were 0.115 and 0.178, respectively. These results indicated low variation within primary tritipyrum lines, probably related to unbiased chromosome and partial aneuploidy. Total genetic diversity (Ht) and gene diversity within lines (Hs) were 0.2114 and 0.1156, respectively. The coefficient of genetic differentiation (Gst) was equal to 0.4534. AMOVA showed highly...
Tipo: Journal article
Palavras-chave: Aneuploidy; Genetic variation; Random primers; Semi random primers; Tritipyrum lines.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100012

Genetic variation among species, races, forms and inbred lines of lac insects belonging to the genus Kerria (Homoptera, Tachardiidae)
Provedor de dados: 74
Autores: Ranjan,Sanjeev Kumar; Mallick,Chandana Basu; Saha,Dipnarayan; Vidyarthi,Ambarish S; Ramani,Ranganathan.
The lac insects (Homoptera: Tachardiidae), belonging to the genus Kerria, are commercially exploited for the production of lac. Kerria lacca is the most commonly used species in India. RAPD markers were used for assessing genetic variation in forty-eight lines of Kerria, especially among geographic races, infrasubspecific forms, cultivated lines, inbred lines, etc., of K. lacca. In the 48 lines studied, the 26 RAPD primers generated 173 loci, showing 97.7% polymorphism. By using neighbor-joining, the dendrogram generated from the similarity matrix resolved the lines into basically two clusters and outgroups. The major cluster, comprising 32 lines, included mainly cultivated lines of the rangeeni form, geographic races and inbred lines of K. lacca. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DNA fingerprinting; Genetic variation; Kerria; Lac insects; RAPD; Tachardiidae.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300023

Genetic variation and trade-offs for reproduction ans survival in the Pacific oyster Crassostrea gigas
Provedor de dados: 5
Autores: Boudry, Pierre; Degremont, Lionel; Bedier, Edouard; Pouvreau, Stephane; Normand, Julien; Ernande, Bruno.
To date, the most significant method to genetically reduce reproductive effort in the Pacific oyster (Crassostrea gigas) has been through the production of triploids, especially since the development of tetraploid lines allowing the breeding of 'natural' triploids. Gametogenesis of triploid oysters is strongly reduced compared with diploids, although they are not fully sterile and can produce viable gametes and some progenies when crossed with diploids. Reduced reproductive allocation and higher heterozygocity are commonly proposed as the main reasons why triploids often present superior yield compared with diploids. Temperature and food availability are known to favour gametogenesis in triploids, but the existence of genetic variation for this trait...
Tipo: Text
Palavras-chave: Selective breeding; Reproduction; Genetic variation; Crassostrea gigas; Pacific oyster; Genetic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3445.pdf

Genetic variation in cultivated Rheum tanguticum populations
Provedor de dados: 74
Autores: Hu,Yanping; Xie,Xiaolong; Wang,Li; Zhang,Huaigang; Yang,Jian; Li,Yi.
To examine whether cultivation reduced genetic variation in the important Chinese medicinal plant Rheum tanguticum, the levels and distribution of genetic variation were investigated using ISSR markers. Fifty-eight R. tanguticum individuals from five cultivated populations were studied. Thirteen primers were used and a total of 320 DNA bands were scored. High levels of genetic diversity were detected in cultivated R. tanguticum (PPB = 82.19, H = 0.2498, H B = 0.3231, I = 0.3812) and could be explained by the outcrossing system, as well as long-lived and human-mediated seed exchanges. Analysis of molecular variance (AMOVA) showed that more genetic variation was found within populations (76.1%) than among them (23.9%). This was supported by the coefficient...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cultivated populations; Genetic variation; ISSR; Polygonaceae; Rheum tanguticum Maxim. ex Balf.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000400010

Genetic variation of acid phosphatase-1 activity in maize
Provedor de dados: 106
Autores: Efron, Yoel.
4 tables
Palavras-chave: Corn; Maize; Genetic variation; Acid phosphatase-1; ข้าวโพด; ความแปรปรวนทางพันธุกรรม.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3897

Genetic variation of wild and hatchery populations of the catla Indian major carp (Catla catla Hamilton 1822: Cypriniformes, Cyprinidae) revealed by RAPD markers
Provedor de dados: 74
Autores: Rahman,S.M. Zakiur; Khan,Mukhlesur Rahman; Islam,Shahidul; Alam,Samsul.
Genetic variation is a key component for improving a stock through selective breeding programs. Randomly amplified polymorphic DNA (RAPD) markers were used to assess genetic variation in three wild population of the catla carp (Catla catla Hamilton 1822) in the Halda, Jamuna and Padma rivers and one hatchery population in Bangladesh. Five decamer random primers were used to amplify RAPD markers from 30 fish from each population. Thirty of the 55 scorable bands were polymorphic, indicating some degree of genetic variation in all the populations. The proportion of polymorphic loci and gene diversity values reflected a relatively higher level of genetic variation in the Halda population. Sixteen of the 30 polymorphic loci showed a significant (p &lt; 0.05, p...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Catla catla; Genetic variation; RAPD markers.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100030

Genetic variations of EBV-LMP1 from nasopharyngeal carcinoma biopsies: potential loss of T cell epitopes
Provedor de dados: 56
Autores: Tang,Y.L.; Lu,J.H.; Cao,L.; Wu,M.H.; Peng,S.P.; Zhou,H.D.; Huang,C.; Yang,Y.X.; Zhou,Y.H.; Chen,Q.; Li,X.L.; Zhou,M.; Li,G.Y.
To find Epstein-Barr virus (EBV) strains with genetic variations of EBV latent membrane protein 1 (EBV-LMP1) from nasopharyngeal carcinoma (NPC), the full-length DNA of LMP1 genes from 21 NPC biopsies obtained in Hunan province in southern China was amplified and sequenced. Our sequences were compared to those previously reported by the Clustal V method. Results showed that all 21 sequences displayed two amino acid changes most frequently in LMP1 of CD4+ T cell epitopes at codons 144 (F®I, 21/21) and 212 (G®S, 19/21) or (G®N, 2/21). We also show that type A EBV strain is prevalent in the cases of NPC from Hunan province with a 30-bp 18/21 deletion, and we highlight that this deletion resulted in loss of one of the CD4+ T cell-restricted epitopes. The other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic variation; Epitope; Immune recognition; Latent membrane protein 1; Tumorigenicity.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000200006

Historia de vida y genética cuantitativa de cuatro poblaciones del cocodrilo de pantano (Crocodylus moreletii) bajo condiciones de cautiverio en el trópico mexicano.
Provedor de dados: 32
Autores: Serna Lagunes, Ricardo.
Se evaluó la variación morfológica, crecimiento corporal, estructura, variación genética y tamaño efectivo de población (Ne) de cuatro poblaciones de Crocodylus moreletii, manejadas en la UMA Cacahuatal, situada en Veracruz, México. La variación morfológica y el crecimiento corporal se evaluaron aplicando un análisis multivariado de covarianza (MANCOVA) y un análisis de varianza (ANOVA), respectivamente. La descripción de la estructura genética se realizó acorde a los principios de Hardy-Weinberg y se evaluó la variación genética con un análisis de varianza molecular (AMOVA), que se corroboró con los estadísticos F. El Ne se determinó a partir del total de cocodrilos reproductivos y se obtuvo la tasa de incremento de endogamia. La población de Villa Juárez...
Palavras-chave: Morfología; Crecimiento corporal; Estructura genética poblacional; Variación genética; Tamaño efectivo de población; Morphology; Body growth; Genetic structure; Genetic variation; Effective population size; Maestría; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/191

Inter-Center collaboration at the ICRISAT Sahelian Center
Provedor de dados: 30
Autores: M.V.K.
Palavras-chave: Millets; Mixed farming; Cowpeas; Genetic resources; Farming systems; Intercropping; Genetics; Genetic variation; Phosphate fertilizers; Plant production.
Ano: 1994
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4183

Interferon-gamma release assay performance in northeastern Brazil: influence of the IFNG + 874 A&amp;gt;T polymorphism
Provedor de dados: 55
Autores: Carneiro,Valdirene Leão; Bendicho,Maria Teresita; Santos,Rosalina Guedes; Casela,Marilda; Netto,Eduardo M.; Mota,Scarlet Torres Moraes; Pina,Iza Cristina Araújo; Nascimento,Roberto Meyer; Freire,Songeli Menezes; Barbosa,Theolis.
ABSTRACT  Introduction Latent tuberculosis infection diagnosis based on the release of interferon-gamma in cultures of peripheral blood cells stimulated with Mycobacterium tuberculosis antigens has replaced the tuberculin skin test in many countries with low tuberculosis prevalence. The IFN-γ production can be influenced by genetic polymorphisms, of which the IFNG + 874 (rs62559044) locus is the most studied. We investigated the possible influence of the IFNG + 874 A/T polymorphism on interferon-gamma test performance.  Methods Patients diagnosed with pulmonary tuberculosis (75), volunteers with positive tuberculin skin test (70) and healthy volunteers with negative tuberculin skin test and no history of contact with tuberculosis (57) were evaluated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tuberculosis infection; Genetic variation; Sensitivity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000300202

Is there genetic variation in seedless Argentinean grapefruit? Implications for crop production and conservation
Provedor de dados: 46
Autores: Chacoff,N P; Souto,C P; Aizen,M.A.; Premoli,A.
Increasing crop genetic diversity has the potential to enhance pollination services, by contributing to the long-term stability of agroecosystems. Different species of the genus Citrus, including grapefruit, are cultivated worldwide. In Argentina, 30% of the total national yield is concentrated in the northwestern part of the country where new cultivars have arisen. We analyzed genetic variation and diversity within and among four plantations of Citrus paradisi for 11 isozyme loci. Although representing single cultivars clonally propagated, within plantations genetic variation was high. Observed heterozygosity ranged from 33 to 36.5%. The number of alleles per locus ranged from 2.4 to 2.6, and polymorphism from 72.7 to 81.8% and for the species in the area...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus; Isozymes; Genetic variation; Upper Bermejo River Basin.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332009000200001

Isoenzymatic variability in wild potatoes
Provedor de dados: 86
Autores: Rocha,Beatriz Helena Gomes; Augustin,Eliane; Silva,João Baptista da; Viégas,Judith.
Two species of wild potato Solanum commersonii, subspecies commersonii and malmeanum, and S. chacoense, subspecies muelleri occur in southern Brazil. Their rusticity and easy adaptation to extreme climatic conditions make them valuable for breeding programs. The objective of this work was to analyze the isoenzymatic variability of 113 clones of wild potato subspecies. They were collected and maintained at Embrapa-Centro de Pesquisa Agropecuária de Clima Temperado, at Pelotas, RS, Brazil. Enzymes involved in energetic (group I) or in peripherical (group II) metabolism constituted the material used. Polyacrylamide horizontal gel electrophoresis was used to analyze peroxidase, aspartate transaminase, phosphoglucomutase and isocitrate dehydrogenase isoenzymes....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Peroxidases; Aminotransferases; Isomerases; Isocitrate dehydrogenase; Genetic variation.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000500008

Limitada variabilidad genética de la quinta introducción en  Cuba de Litopenaeus vannamei estimada con el uso  de marcadores microsatélites
Provedor de dados: 20
Autores: Artiles, A.; Rodríguez, I.; Pérez, A.; Pérez, L.; Espinosa, G.
Se estimó la variabilidad genética y el índice de parentesco entre lotes de camarón blanco del Pacífico, Litopenaeus  vannamei, introducidos por quinta ocasión en Cuba, procedentes del Centro de mejora del camarón, de Estados  Unidos (Shrimp Improving System: SIS), para su cultivo. La variabilidad genética se estimó mediante el genotipo de  33 muestras con cuatro loci microsatélites: M1, Pvan 1815, Pvan 0040 y Pvan 1758. El quinto lote de Litopenaeus  vannamei tuvo los valores promedios de heterocigosidad esperada y observada, más bajos de todos los introduci- dos en Cuba: 0.37 y 0.27, respectivamente. Esto, unido a la poca cantidad de variantes alélicas para cada región  microsatélite, indica una escasa variabilidad genética. Los valores del coeficiente...
Tipo: Journal Contribution
Palavras-chave: Genetic variation.
Ano: 2011
URL: http://hdl.handle.net/1834/5346

Local Seed Systems and Village-Level Determinants of Millet Crop Diversity in Marginal Environments of India
Provedor de dados: 31
Autores: Nagarajan,   Latha; Smale,   Melinda.
In the subsistence-oriented, semi-arid production systems of Andhra Pradesh and Karnataka, India, the environment is marginal for crop growth and often there is no substitute for millet crops. Across communities, farmers grow thirteen different combinations of pearl millet, sorghum, finger millet, little millet, and foxtail millet varieties, but individual farmers grow an average of only two to three millet varieties per season. The notion of the seed system includes all channels through which farmers acquire genetic materials, outside or in interaction with the commercial seed industry. Data are compiled through household surveys and interviews with traders and dealers in village and district markets. Based on the concept of the seed lot, several...
Tipo: Working or Discussion Paper
Palavras-chave: Seed systems; Millet diversity; Variety change; Seed users; Crop diversity; Seed industry and trade; Genetic variation; Crop Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/59229

Low genetic variability in the fifth introduction  of Litopenaeus vannamei in Cuba, as estimated  with microsatellite markers
Provedor de dados: 20
Autores: Artiles, A.; Rodríguez, I.; Pérez, A.; Pérez, L.; Espinosa, G.
The present work estimated the genetic variability and relatedness index of the fifth stock of Pacific white shrimp,  Litopenaeus vannamei, imported into Cuba for farming purposes from the US Shrimp Improvement System (SIS). Ge- netic variability was estimated by genotyping 33 samples for four microsatellite loci: M1, Pvan 1815, Pvan 0040 and  Pvan 1758. This stock had average expected and observed heterozygosities of 0.37 and 0.27 respectively; the lowest  of all stocks previously introduced in Cuba. The above, together with the low amount of allelic variants detected for  each microsatellite, was suggestive of low genetic variability. In addition, pairwise relatedness coefficients clustered  around unity, indicating a high degree of consanguinity. Taken...
Tipo: Journal Contribution
Palavras-chave: Genetic variation; Shrimp culture.
Ano: 2011
URL: http://hdl.handle.net/1834/5348

Macrozooplankton diversity: how much do we really know?
Provedor de dados: 16
Autores: Pierrot-Bults, A.C.; Spoel, S. van der.
Pelagic species are widely distributed in a horizontal plane and have three-dimensional distributions, since the sea covers about 70% of the surface of the earth, and on average 4 km deep. For most macrozooplankton and micronekton groups there seems to be no great expectations of finding new taxa with the exception of gelatinous groups and of the deep sea, which is a relatively unknown especially in the benthopelagic zone close to the sea-bed. However, we do not know very much about variation, either morphological or genetical, within socalled species in different parts of their range. We think we are dealing with single very broadly distributed species, which, in reality, are species complexes consisting of several more or less cryptic species or...
Tipo: Article / Letter to the editor
Palavras-chave: Pelagic macrozooplankton/micronekton diversity; Biogeographic patterns; Genetic variation; Morphological variation; Cryptic species; 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220316

Mechanisms of adaptation to climate variability in West African pearl millet landraces – a preliminary assessment
Provedor de dados: 30
Autores: Haussmann, B.I.G.
Palavras-chave: Photoperiodicity; Planting date; Millets; Phenotypes; Drought stress; Genotypes; Genetic variation; Statistical methods; Replication; Breeds (animals).
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3312

Melhoramento genético da pimenta-do-reino (Piper nigrum L.).
Provedor de dados: 14
Autores: POLTRONIERI, M. C.; ALBUQUERQUE, F. C. de; POLTRONIERI, L. S.
bitstream/item/57818/1/CPATU-PA179.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Resistência a doença; Brasil.; Melhoramento Genético Vegetal; Piper Nigrum; Variação Genética.; Amazonia; Disease resistance; Genetic variation; Plant breeding.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375214

Morphological and growth responses to water stress of two sub-populations of Bromus pictus from soils with contrasting water availability
Provedor de dados: 97
Autores: ROTUNDO,JOSÉ L; CIPRIOTTI,PABLO A; GUNDEL,PEDRO E.
We studied morphological and growth responses to drought of two sub-populations of Bromus pictus from communities with soils with different water availability from the Patagonian steppe. After a process of acclimatization common to both sub-populations, individuals from both sub-populations were subjected to three levels of water availability during 44 days. Independently of the water availability treatment, the sub-population from the community of high soil water availability showed higher aboveground relative growth rate (RGR) and higher leaf size (area and weight) compared to the sub-population from the community of low soil water availability. These results prove the expected evolution of higher growth rates and leaf sizes in resource rich...
Tipo: Journal article
Palavras-chave: Arid lands; Drought; Ecotypes; Genetic variation; Soil depth.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000100006

Morphological and molecular characterization of common bean landraces cultivated in the semi-arid Mexican high plateau
Provedor de dados: 51
Autores: Gill Langarica,Homar Rene; Rosales Serna,Rigoberto; Hernandez Delgado,Sanjuana; Mayek Perez,Netzahualcoyotl.
The objective of the current research was to characterize the common bean in agricultural fields planted with common bean landraces from the semi-arid Mexican high plateau using both morphological and amplified fragment length polymorphism (AFLPs) data. The morphological traits were discriminating and exhibited the clustering of 150 accessions based on the geographic origin and seed coat color. AFLP primer combinations exhibited a polymorphic range between 0.292 (E-AGG + M-ACT) and 0.375 (E-ACA + M-AGA). The frequency and distribution of the polymorphic fragments allowed the detection of a larger number of rare fragments in accessions 121 and 111 (Flor de Mayo and black common beans, respectively). The analysis of genetic relationships, analysis of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AFLP; Genetic variation; Landraces; Phaseolus vulgaris L.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722014000400010

Origin of variability in maize
Provedor de dados: 106
Autores: Dhawan, N.L.; Sprague, E.W.
1 ill.
Palavras-chave: Corn; Maize; Corn origin; Corn variability; Genetic variation; ข้าวโพด; แหล่งกำเนิด; ความแปรปรวนทางพันธุกรรม.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3742

Pathogenicity mechanisms of prokaryotic cells: an evolutionary view
Provedor de dados: 55
Autores: Sousa,Cristina Paiva de.
The success of pathogenic microbes depends on their ability to colonize host tissues and to counter host defense mechanisms. Microorganisms can produce overwhelming infection because of their relatively short generation times, and because they have evolved powerful mechanisms for generating phenotypic diversity as an efficient strategy for adapting to rapidly responding immune system defenses and the broad range of polymorphisms characteristic of different host tissues. Bacterial evolution may not be a continuous process, but more of a succession of temporally spaced major events. These events cause a non-gradual sequence of adaptations to a given environment. The pathogenicity islands may be genetically unstable elements, and many of the genes coding for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pathogenicity; Prokaryotic evolution; Genetic variation; Bacterial virulence.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702003000100004

Phylogenetic relationships among species of the subsection Dendrophlomis Bentham
Provedor de dados: 69
Autores: Yuzbasioglu,Ertugrul; Dadandi,Mehmet Yasar.
This study used randomly amplified polymorphic DNA markers to determine genetic relationships among species of the subsection Dendrophlomis. Twenty accessions of the eleven Phlomis taxa were evaluated to determine genetic variability using fourteen ten mer primers selected from a 125 random oligonucleotide set. These 14 selected primers generated 85 RAPD bands that ranged in size from 200 to 1200 base pairs. Of the total bands, 88% (75) were polymorphic among the samples. Genetic distances among accessions were computed to produce a dendrogram based on UPGMA. Genetic distances ranged from 0.133 (between P. amanica and P. monocephala) to 0.494 (between P. chimerae and P. lunariifolia). The UPGMA tree based on distances has two major groups. The first...
Tipo: Journal article
Palavras-chave: Genetic diversity; Genetic relationships; Genetic variation; Phlomis species; RAPDs.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000400012

Polymorphism of the grasshopper Rhammatocerus schistocercoides populations revealed by RAPD
Provedor de dados: 86
Autores: Silva,João Batista Tavares da; Tigano,Myrian Silvana; Magalhães,Bonifácio Peixoto; Cordeiro,Célia Maria Torres.
The objective of this work was to study the genetic variability of the grasshopper Rhammatocerus schistocercoides (Orthoptera: Acrididae) using RAPD analysis among individuals from three populations, one from Colombia and two from Brazil (Goiás and Mato Grosso States). Ninety scorable binary markers were obtained by fingerprinting with 11 oligonucleotide primers. Most of the polymorphism was attributed to 42 markers with variable frequency among the different populations. Although the existence of significant difference among populations (P&lt;0.0001), most of the genetic variability was found within populations (87.7% of total variation). Pairwise distances between Colombian and Brazilian populations were 0.12 (P&lt;0.0001) and 0.18 (P&lt;0.0001) for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Genetic marker; Genetic variation; Genetic distance.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001100020

Prospects of breeding for micronutrients and β-carotene-dense sorghums
Provedor de dados: 30
Autores: Reddy, B.V.S.,( Belum V. S. Reddy ).
Palavras-chave: Carotenes; Grain; Organic acid salts; Agronomic characters; Heritability; Germplasm; Phenotypes; Genetic variation; Sorghum; Zinc.
Ano: 2005
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3256

Quantificação da variabilidade genética entre matrizes de Coffea canephora das variedades botânicas Conilon e Robusta.
Provedor de dados: 14
Autores: ROCHA, R. B.; RAMALHO, A. R.; TEIXEIRA, A. L.; VIEIRA JUNIOR, J. R.; ESPINDULA, M. C.; Marcos Santana Moraes.
O objetivo desse trabalho foi quantificar a divergência genética entre 130 acessos clonais de Coffea canephora das variedades botânicas Conilon, Robusta e híbridos interespecíficos.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Café Conilon; Híbrido interespecífico; Embrapa Rondônia; Ouro Preto d'Oeste (RO); Rondônia; Amazônia Ocidental; Western Amazon; Coffea Canephora; Café Robusta; Variação Genética; Campo Experimental; Genetic variation; Interspecific hybridization.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125208

Random amplified polymorphic DNA profiles as a tool for the characterization of Brazilian keratitis isolates of the genus Acanthamoeba
Provedor de dados: 56
Autores: Alves,J.M.P.; Gusmão,C.X.; Teixeira,M.M.G.; Freitas,D.; Foronda,A.S.; Affonso,H.T.
The genus Acanthamoeba comprises free-living amebae identified as opportunistic pathogens of humans and other animal species. Morphological, biochemical and molecular approaches have shown wide genetic diversity within the genus. In an attempt to determine the genetic relatedness among isolates of Acanthamoeba we analyzed randomly amplified polymorphic DNA (RAPD) profiles of 11 Brazilian isolates from cases of human keratitis and 8 American type culture collection (ATCC) reference strains. We found that ATCC strains belonging to the same species present polymorphic RAPD profiles whereas strains of different species show very similar profiles. Although most Brazilian isolates could not be assigned with certainty to any of the reference species, they could...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acanthamoeba; Keratitis; RAPD typing; Genetic variation.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000100003

Residual effects of successive exposure of soybean Bradyrhizobium strains to aluminium on solid defined medium
Provedor de dados: 86
Autores: Campo,Rubens José; Wood,Martin.
The aim of these studies was to investigate whether residual toxic effects of exposing soybean root nodule bacteria to Al in a solid defined media (SDM) alter tolerance to Al, survival, sensitivity to antibiotics, N2 fixation effectiveness and genetic diversity of Bradyrhizobium strains. After being exposed four times to Al, strains showed variation in Al tolerance but there was no evidence of change in their original Al tolerance, sensitivity to the antibiotics or genetic diversity. Exposure of Bradyrhizobium strains to SDM plus Al did not alter biological N2 fixation effectiveness of five strains. Strain SEMIA 587 showed a reduction in its N2 fixation effectiveness but it seems that it was just a superficial toxic effect because one single passage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fixation; Antibiotics; Resistance to chemicals; Genetic variation.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001100011

Seed yield of simple and trí-línear corn (Zea mays L.) hybrids for the mexican humid tropics
Provedor de dados: 109
Autores: Macías,Mauro Sierra; Rodríguez Montalvo,Flavio A.; Espinosa Calderón B,Alejandro; Tadeo Robledo,Margarita; Gómez Montiel,Noel Orlando; Vázquez Carrillo,María Griselda; Ugalde Acosta,Francisco Javier; Freyre,Sabel Barrón; Arellano,José Luis Del Rosario; Leyva Ovalle,Otto Raúl; Serna Lagunes,Ricardo; Meza,Pablo Andrés.
Abstract The objective of the work was to evalúate the agronomic performance and seed yield of tropical corn (Zea mays L.) of single and tri-linear crosses. In the spring-summer of 2015 and 2016, two essays were established in the states of Veracruz and Tabasco, Mexico. In the first essay, a group of 12 single crosses was evaluated, and in the second, a group of 18 tri-linear crosses was evaluated. In both essays, the treatments were distributed under a completely randomized block design with three replicates in 5 m long, two-row plots and 0.8 m between rows, with an initial population density of 62.500 plants ha-1. Within the simple cross trial, hybrids HE-3W, COMERCIAL 1, LT-164xLT-165, and HE-1W presented seed yields above the general mean (3384 kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomic performance; Genetic variation; Heterosis; Hybridization; Productivity.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000200180

Sequence of ITS-2 Amplified from Pearl Millet Downy Mildew Samples
Provedor de dados: 30
Autores: Viswanathan, A.
Palavras-chave: DNA; PCR; Genetic techniques; Sampling; Ribosomes; Fungi; Genetic variation; Genes; Millets; Cloning.
Ano: 2005
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3262

Simultaneous Occurrence of Three Anatomical Variations: Anomalous Right Subclavian Artery, Non-Recurrent Inferior Laryngeal Nerve and Right Thoracic Duct
Provedor de dados: 77
Autores: Peña,Elizabeth; Zúñiga,Janneth; Baena,Gloria.
In one male cadaver of Colombian nationality, dissected by a group of medical students during a gross anatomy course at the Universidad del Valle in Cali, Colombia, three anatomical variations were found: an anomalous or aberrant right subclavian artery (ARSA), a non-recurrent inferior laryngeal nerve and a right thoracic duct. The aortic arch gave origin to four instead of three arteries, which, from right to left, were the right common carotid, the left common carotid, the left subclavian and the right subclavian arteries. The anatomical variation of the right subclavian artery is known also as lusoria artery, in which case the artery passes behind the esophagus and the trachea in its course towards the right side of the neck. The perimeters of the...
Tipo: Journal article
Palavras-chave: Aberrant right subclavian artery; Recurrent laryngeal nerve; Thoracic duct; Genetic variation.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000400006

Sistema de acasalamento de P. hispidinervum C.DC., em uma população natural de Assis Brasil, AC.
Provedor de dados: 14
Autores: WADT, L. H. de O.; KAGEYAMA, P. Y.
O presente trabalho foi desenvolvido com a finalidade de se estimar o sistema preferencial de cruzamento e o coeficiente de endogamia, via marcador de DNA, de uma população natural de pimenta longa, no Vale do Acre.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Endogamy; Variación genética; Fitomejoramiento; Técnica de ADN polimórfico amplificado al azar; Marcador RAPD; Assis Brasil (AC); Vale do Rio Acre; Isolamento por distância; Amazônia Ocidental; Acre; Amazonia Occidental.; Western Amazon; Pimenta Longa; Piper Hispidinervum; Marcador Genético; População de Planta; Variação Genética; Endogamia; Melhoramento Genético Vegetal.; Piper longum; Plant breeding; Genetic markers; Genetic variation; Random amplified polymorphic DNA technique.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117274

Small-scale morphological and genetic differentiation in the Mediterranean killifish Aphanius fasciatus (Cyprinodontidae) from a coastal brackish-water pond and an adjacent pool in northern Sardinia
Provedor de dados: 5
Autores: Maltagliati, F; Domenici, P; Fosch, Cf; Cossu, P; Casu, M; Castelli, A.
Two samples of Aphanius fasciatus collected in the Pilo pond (northern Sardinia, Italy) and in an adjacent pool of small surface area were analysed morphologically (235 individuals) and genetically (a subsample of 58 individuals). The aims of the present study were (i) to test the hypothesis that different predation pressures may be associated with morphological and/or genetic differences between samples from each habitat and (ii) to assess the level of divergence between the two populations. Morphological analysis was based on the relative size of fins because it has been shown to be associated with predation pressure. The relative caudal fin area (caudal fin area/total body surface) was smaller in specimens from the pool, in both males and females,...
Tipo: Text
Palavras-chave: Morphologie; Taille relative des nageoires; Variation génétique; Divergence de populations; Eaux saumâtres; Morphology; Relative fin size; Genetic variation; RAPDs; Population divergence; Brackish-water habitats.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43291/43026.pdf

SSR genetic diversity assessment of popular pigeonpea varieties in Malawi reveals unique fingerprints
Provedor de dados: 69
Autores: Njung'e,Vincent; Deshpande,Santosh; Siambi,Moses; Jones,Richard; Silim,Said; De Villiers,Santie.
Background: Pigeonpea (Cajanus cajan (L.) Millsp.) is a drought tolerant legume of the Fabaceae family and the only cultivated species in the genus Cajanus. It is mainly cultivated in the semi-arid tropics of Asia and Oceania, Africa and America. In Malawi, it is grown as a source of food and income and for soil improvement in intercropping systems. However, varietal contamination due to natural outcrossing causes significant quality reduction and yield losses. In this study, 48 polymorphic SSR markers were used to assess the diversity among all pigeonpea varieties cultivated in Malawi to determine if a genetic fingerprint could be identified to distinguish the popular varieties. Results: A total of 212 alleles were observed with an average of 5.58 alleles...
Tipo: Journal article
Palavras-chave: Genetic variation; Genotyping; Microsatellites; Seed purity.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000300008

Strategies for the retention of high genetic variability in European flat oyster (Ostrea edulis) restoration programmes
Provedor de dados: 5
Autores: Lallias, Delphine; Boudry, Pierre; Lapegue, Sylvie; King, Jon W.; Beaumont, Andy R.
The native European flat oyster Ostrea edulis is listed in the OSPAR Convention for the Protection of the Marine Environment of the North-East Atlantic (species and habitat protection) and in the UK Biodiversity Action Plan. Once extremely abundant in the 19th century, European stocks of O. edulis have declined during the 20th century to rare, small, localised populations due to overexploitation, habitat degradation and, most recently, the parasitic disease bonamiosis. Selective breeding programmes for resistance to bonamiosis have been initiated in France and Ireland. High genetic diversity and bonamiosis-resistance would be important features of any sustainable restoration programmes for O. edulis. Oysters were sampled across Europe from four hatchery...
Tipo: Text
Palavras-chave: Restoration programme; Ostrea edulis; Genetic variation; Pedigree reconstruction.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00001/11259/11375.pdf

Taxonomic status of two morphotypes of Coryphaena hippurus (Perciformes: Coryphaenidae)
Provedor de dados: 83
Autores: Bonner,Alan; Duarte,Michelle R.; Souza,Rosa C. C. L.; Monteiro-Neto,Cassiano; Silva,Edson P.
ABSTRACT Two Coryphaena hippurus morphotypes (dourado and palombeta) are found along the Brazilian coast and are considered by Rio de Janeiro’s fisherman and fishmongers as two different species. Furthermore, these morphotypes are commercialized under different values and suffer different fishing pressure. Therefore, a definition of their taxonomic status is an important economic and biological matter. In order to investigate this problem, allozyme electrophoresis method was undertaken for seventeen loci on 117 individuals of C. hippurus sampled at Cabo Frio/RJ (Brazil). The data indicate homogeneity between the morphotypes gene pools. Nevertheless, differences were found for genetic variation among dourado and palombeta, especially due to alcohol...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alcohol dehydrogenase; Allozyme electrophoresis; Biochemical systematics; Fishery resources; Genetic variation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100205

Tecnologias em genética molecular para intensificação do uso de amendoim forrageiro em pastagens na Amazônia.
Provedor de dados: 14
Autores: OLIVEIRA, J. C. de; CAMPOS, T. de.
O setor agropecuário brasileiro tem apresentado crescente participação na economia, especialmente no mercado exportador mundial, onde a pecuária de corte tem destaque. O desafio é continuar a aumentar a produção e, simultaneamente, reduzir o desmatamento. Investimentos em tecnologia buscam tornar a pecuária mais sustentável, como o uso de gramíneas consorciadas com leguminosas forrageiras. O amendoim forrageiro (Arachis pintoi) destaca-se dentre as leguminosas forrageiras por seu alto teor de proteína, boa cobertura do solo e compatibilidade com gramíneas, além da fixação biológica de nitrogênio. O programa de melhoramento do amendoim forrageiro tem como objetivo desenvolver novas cultivares adaptadas aos diversos climas do território brasileiro. Os...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Fitomejoramiento; Pastoreo mixto; Pastos forrajeros; Leguminosas forrajeras; Variación genética; Marcadores genéticos; Repeticiones de microsatélite; Marcador microssatélite; Amendoim forrageiro; Forage peanut; Cacahuetes forrajeros; Melhoramento Genético Vegetal; Pastagem Consorciada; Gramínea Forrageira; Kudzu; Pueraria Phaseoloides; Capim Quicuio; Brachiaria Humidicola; Leguminosa Forrageira; Variação Genética; Marcador Molecular; Plant breeding; Mixed grazing; Forage grasses; Urochloa humidicola; Forage legumes; Arachis pintoi; Genetic variation; Genetic markers; Microsatellite repeats.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1109927

Toxigenic profile and AFLP variability of Alternaria alternata and Alternaria infectoria occurring on wheat
Provedor de dados: 58
Autores: Oviedo,María Silvina; Sturm,María Elena; Reynoso,María Marta; Chulze,Sofia Noemi; Ramirez,María Laura.
The objectives of this study were to evaluate the ability to produce alternariol (AOH), alternariol monomethyl ether (AME) and tenuazonic acid (TA) by A. alternata and A. infectoria strains recovered from wheat kernels obtained from one of the main production area in Argentina; to confirm using AFLPs molecular markers the identify of the isolates up to species level, and to evaluate the intra and inter-specific genetic diversity of these two Alternaria species. Among all the Alternaria strains tested (254), 84% of them were able to produce mycotoxins. The most frequent profile of toxin production found was the co-production of AOH and AME in both species tested. TA was only produced by strains of A. alternata. Amplified fragment polymorphism (AFLPs)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternaria alternata; Alternaria infectoria; Alternariol; Alternariol monomethyl ether; Tenuazonic acid; AFLPs; Wheat; Genetic variation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200017

Use of AFLP markers to estimate molecular diversity of Phakopsora pachyrhizi
Provedor de dados: 69
Autores: Lourdes Rocha,Carla Maria; Vellicce,Gabriel Ricardo; García,María Gabriela; Pardo,Esteban Mariano; Racedo,Josefina; Perera,María Francisca; de Lucía,Adrian; Gilli,Javier; Bogado,Noelia; Bonnecarrère,Victoria; German,Silvia; Marcelino,Francismar; Ledesma,Fernando; Reznikov,Sebastián; Ploper,Leonardo Daniel; Welin,Bjorn; Castagnaro,Atilio Pedro.
Background Asian soybean rust (SBR) caused by Phakopsora pachyrhizi Syd. &amp;amp; Syd., is one of the main diseases affecting soybean and has been reported as one of the most economically important fungal pathogens worldwide. Knowledge of the genetic diversity of this fungus should be considered when developing resistance breeding strategies. We aimed to analyze the genetic diversity of P. pachyrhizi combining simple sampling with a powerful and reproducible molecular technique. Results We employed Amplified Fragment Length Polymorphism (AFLP) technique for the amplification of P. pachyrhizi DNA extracted from naturally SBR-infected plants from 23 production fields. From a total of 1919 markers obtained, 77% were polymorphic. The high percentage of...
Tipo: Journal article
Palavras-chave: Asian soybean rust; Genetic variation; Glycine max; Molecular markers.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600009

Uso da biologia molecular para estudos genéticos em açaizeiros na Amazônia brasileira.
Provedor de dados: 14
Autores: AZÊVEDO, H. S. F. da S.; AZEVEDO, J. M. A. de; SILVA, L. M. da; MARTINS, K.; CAMPOS, T. de.
Populações de açaizeiros na Amazônia são abundantes, possuem importância econômica e têm sido foco de diferentes estudos. Os açaizeiros destacam-se por produzir um importante alimento: a ?polpa de açaí?? extraída dos frutos. Nos últimos anos, a demanda pela polpa aumentou de forma expressiva por possuir características energéticas, nutritivas e altos teores de fibras e antioxidantes. A extração dos frutos é baseada no extrativismo e por isso, práticas de manejo têm sido recomendadas para uma coleta sustentável. Para se recomendar taxas sustentáveis de coleta dos frutos, é fundamental o levantamento de informações sobre a variabilidade genética das populações naturais, além do monitoramento sobre o recrutamento e a dinâmica populacional. A transferibilidade...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Fitomejoramiento; Variación genética; Marcadores genéticos; Repeticiones de microsatélite; Marcador microssatélite; Melhoramento Genético Vegetal; Açaí; Euterpe Edulis; Euterpe Oleracea; Variação Genética; Marcador Molecular; Plant breeding; Euterpe precatoria; Genetic variation; Genetic markers; Microsatellite repeats.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1109928

Uso de marcadores RAPD e do sistema de informacao geografica no estudo da variabilidade genetica de Stylosanthes macrocephala.
Provedor de dados: 14
Autores: BARROS, A. M.; FALEIRO, F. G.; SHIRATSUCHI, L. S.; KARIA, C. T.; LOPES, G. K. B.; ANDRADE, R. P.
bitstream/CPAC-2009/24956/1/p2004_09.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Stylosanthes macrocepala; Feed legumes.; Biogeografia; Biotecnologia; Marcador Genético; Marcador Molecular; Leguminosa Forrageira; Sistema de Informação Geográfica; Variação Genética.; Biotechnology; Genetic variation; Geographic information systems; Biogeography; Genetic markers; Molecular biology.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567934

Variabilidade em população de Stevia rebaudiana como subsídio para a seleção e melhoramento genético.
Provedor de dados: 14
Autores: FALEIRO, F. G.; SPEHAR, C. R.; PEREIRA, A. V.; PEREIRA, E. B. C.; BELLON, G.; BARROS, A. M.; JUNQUEIRA, N. T. V.; SILVA, L. C.
bitstream/CPAC-2009/26857/1/p2005_48.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD.; Stévia; Marcador Molecular; Melhoramento Genético Vegetal; Planta Produtora de Açúcar; Variação Genética.; Genetic variation; Genetic markers; Plant breeding; Sugar crops.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/563945

Variabilidade fenotípica entre cultivares brasileiras, americanas e canadenses de aveia branca.
Provedor de dados: 14
Autores: VIEIRA, E. A.; CARVALHO, F. I. F. de; SILVA, M. S.; FIALHO, J. de F.
RESUMO: A variabilidade genética em programas de melhoramento pode ser incrementada pela introdução de germoplasma. Entretanto, é necessário que se conheça a distância genética entre esses e os genótipos locais, para que se maximizem as chances de êxito. O trabalho objetivou estimar a disância genética entre 15 cultivares de aveia branca, das quais 11 são estrangeiras (10 americanas e 1 canadense) e 4, brasileiras. O experimento foi conduzido em 2004 na área experimental da UFPel. O delineamento experimental foi o de blocos casualizados com três repetições. Os dados aferidos foram submetidos à análise de variância e foi estimada a matriz de distâncias de Mahalanobis entre os genótipos. A partir da matriz de distâncias foi construído um dendrograma, que...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Cultura anual.; Avena Sativa; Aveia; Genética Vegetal; Melhoramento Genético Vegetal; Variedade.; Variação Genética; Annuals; Genetic variation; Genetics; Plant breeding; Oats; Varieties.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570250

Variabilidade genética de acessos de Arachis pintoi avaliados em diferentes centros de pesquisa da Embrapa com base em marcadores RAPD.
Provedor de dados: 14
Autores: FALEIRO, F. G.; ANDRADE, R. P. de; KARIA, C. T.; VALENTIM, J. F.; ANDRADE, C. M. S. de; RAMOS, A. K. B.; BELLON, G.; PENALOZA, A. D. P. de S.; VALLS, J. F. M.
bitstream/CPAC-2009/26854/1/p2005_45.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Feed legumes.; Leguminosa Forrageira; Marcador Molecular; Melhoramento Genético Vegetal; Variação Genética.; Genetic variation; Genetic markers; Plant breeding.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/555267

Variabilidade genética de acessos de maracujá-suspiro (Passiflora nitida Kunth.) com base em marcadores moleculares.
Provedor de dados: 14
Autores: JUNQUEIRA, K. P.; FALEIRO, F. G.; RAMOS, J. D.; BELLON, G.; PAULA, M. da S.; JUNQUEIRA, N. T. V.; BRAGA, M. F.
bitstream/CPAC-2009/27694/1/p2006_33.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Biotecnologia; Marcador Genético; Marcador Molecular; Maracujá; Passiflora Edulis; Variação Genética.; Genetic markers; Biotechnology; Genetic variation; Passion fruits.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570171

Variabilidade genética de matrizes de pequizeiro selecionadas para estudos na Embrapa Cerrados e na UPIS- Faculdades Integradas, com base nos marcadores RAPD.
Provedor de dados: 14
Autores: BELLON, G.; FALEIRO, F. G.; CAMARGO, J. T.; ANDRADE, S. R. M. de; PEREIRA, A. V.; PEREIRA, E. B. C.
bitstream/CPAC-2009/26862/1/p2005_53.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Indigenous organisms.; Caryocar Brasiliense; Espécie Nativa; Marcador Molecular; Melhoramento Genético Vegetal; Pequi; Variação Genética.; Genetic variation; Genetic markers; Plant breeding.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569475

Variabilidade genetica de plantas de Stylosanthes guianensis var. vulgaris com base em marcadores RAPD.
Provedor de dados: 14
Autores: FALEIRO, F. G.; BARCELLOS, A. de O.; ANDRADE, R. P.; KARIA, C. T.; RAMOS, A. K. B.; COELHO, M. H.; PINTO, J. F. N.
bitstream/CPAC-2009/24948/1/p2004_02.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Feed legumes.; Leguminosa Forrageira; Marcador Molecular; Melhoramento Genético Vegetal; Variação Genética.; Genetic variation; Genetic markers; Biotechnology; Plant breeding.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567821

Variabilidade genética de uma coleção de trabalho de capim-elefante Penisetum purpureum com base em marcadores RAPD.
Provedor de dados: 14
Autores: FALEIRO, F. G.; FERNANDES, F. D.; MARTHA JÚNIOR, G. B.; RAMOS, A. K. B; BELLON, G.; KARIA, C. T.; ANDRADE, R. P. de; OLIVEIRA, S. D. de; LÉDO, F. J. da S.; PEREIRA, A. V.
bitstream/CPAC-2009/26855/1/p2005_46.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Feed grasses.; Gramínea Forrageira; Marcador Molecular; Melhoramento Genético Vegetal; Variação Genética.; Genetic markers; Genetic variation; Plant breeding.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/555269

Variabilidade genética de uma coleção de trabalho de guandu (Cajanus cajan) com base em marcadores moleculares.
Provedor de dados: 14
Autores: FALEIRO, F. G.; FERNANDES, F. D.; AMABILE, R. F.; RAMOS, A. K. B.; KARIA, C. T.; BELLON, G.; BARBOSA, F.; ANDRADE, R. P.; GODOY, R.
bitstream/CPAC-2009/26856/1/p2005_47.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Feed legumes.; Leguminosa Forrageira; Marcador Molecular; Melhoramento Genético Vegetal; Variação Genética.; Genetic markers; Genetic variation; Plant breeding.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/559907

Variabilidade genética entre e dentro de populações naturais de Piper hispidinervum C. DC.
Provedor de dados: 14
Autores: WADT, L. H. de O.; KAGEYAMA, P. Y.
O objetivo deste trabalho foi avaliar, via marcador de DNA (RAPD - Polimorfismo de DNA amplificado ao acaso), a estrutura genética de populações naturais de P. hispidineivum no Vale do Rio Acre.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Amazônia Ocidental; Endogamy; Variación genética; Fitomejoramiento; Técnica de ADN polimórfico amplificado al azar; Isolamento por distância; Vale do Rio Acre; Acre; Western Amazon; Amazonia Occidental.; Pimenta Longa; Piper Hispidinervum; Variação Genética; Marcador Genético; Melhoramento Genético Vegetal.; Endogamia; População de Planta; Piper longum; Genetic variation; Random amplified polymorphic DNA technique.; Plant breeding; Genetic markers.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117279

Variabilidade genética para caracteres morfológicos entre acessos do banco de germoplasma de mandioca da Embrapa Cerrados.
Provedor de dados: 14
Autores: VIEIRA, E. A.; FIALHO, J. de F.; FALEIRO, F. G.; FUKUDA, W. M. G.; JUNQUEIRA, N. T. V.
bitstream/CPAC-2009/26796/1/p2005_08.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Germoplasma; Mandioca; Manihot Esculenta; Melhoramento Genético Vegetal; Variação Genética.; Germplasm; Cassava; Genetic variation; Plant breeding.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569423

Variabilité génétique entre les classes d'âge chez le pageot commun (Pagellus erythrinus, Sparidae) des côtes nord Tunisiennes
Provedor de dados: 20
Autores: Fassatoui, Ch.; Romdhane, M.S.
La variabilité génétique entre les classes d’âge du pageot commun, Pagellus erythrinus (Linnaeus, 1758 ; Sparidae) a été appréhendée par une analyse isoenzymatique. L’étude aà été portée sur 251 spécimens des côtes Nord de la Tunisie. L’âge des poissons a été estimé indirectement par analyse otolithométrique. Les quatorze systèmes enzymatiques utilisés sont codés par 21 loci dont 10 sont polymorphes au seuil de 99%. Le taux d’hétérozygotie attendu non biaisé moyen (Hnb = 0,048) est comparable à celui rapporté chez les espèces ichtyologiques, notamment les Sparidés. La vérification de l’équilibre de Hardy-Weinberg montre un écart significatif à la panmixie dans le sens d’un déficit en Hétérozygotes (FIS = 0,116, p &lt; 0,001). L’indice de diversité...
Tipo: Journal Contribution
Palavras-chave: Genetic variation; Allozymes; Seabream fisheries.
Ano: 2010
URL: http://hdl.handle.net/1834/4689

Variação fenotípica em acessos de açaizeiro (Euterpe oleracea Mart.) para caracteres relacionados à produção de frutos.
Provedor de dados: 14
Autores: OLIVEIRA, M. do S. P. de; LEMOS, M. A.; SANTOS, E. O. dos; SANTOS, V. F. dos.
bitstream/item/32828/1/CPATU-BP209.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Caracteristica agronomica; Belem; Pará; Brasil; Phenotypes; Agronomic characteristics.; Açaí; Fenótipo; Euterpe Oleracea; Fruta; Melhoramento Genético Vegetal; Produtividade; Variação Genética.; Amazonia; Genetic variation; Fruits; Plant breeding; Yields.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376612

Variedades de mandioca do Acre.
Provedor de dados: 14
Autores: SIVIERO, A.; LESSA, L. S.; SANTOS, R. C. dos.
Este texto trata da nomenclatura, histórico entre indígenas e agricultores familiares e aspectos sócio-econômicos das variedades de mandioca do Acre.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Yuca; Ensayos de variedades; Prácticas de cultivo vegetal; Variación genética; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Mandioca; Manihot Esculenta; Variedade; Pratica Cultural; Variação Genética; Cassava; Variety trials; Plant cultural practices; Genetic variation.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1119065

การตอบสนองทางสรีรวิทยาต่อความเครียดเนื่องจากความร้อนในโคนมที่มีจีโนไทป์ที่แตกต่างกันของยีน HSP70-2
Provedor de dados: 106
Autores: Tatsaporn Siripug; Suporn Katawatin.
HSP70-2 is well accepted as an indicator of heat stress. The purpose of this study was to investigate the physiological responses to heat stress of differential genotypes of HSP70-2 in dairy cattle. Thirty two female Holstein Friesian (HF) crossbred heifers, 2-3 years of age, 266 ± 5.6 kg body weight were placed outdoor with partial roof. Blood samples were collected to do genotyping of HSP70-2 using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. Ambient temperature, relative humidity and physiological responses, including rectal temperature, respiration rate, sweating rate, pulse rate, skin temperature, and N/L ratio were examined at 06.00, 14.00, 18.00 and 22.00. Genotyping revealed that there were 14 and 18...
Tipo: PhysicalObject
Palavras-chave: Dairy cattle; Genotypes; Genetic variation; Hsp70-2; Heat stress; Heat tolerant; Genetic improvement; โคนม; รูปแบบจีโนไทป์; พันธุกรรม; การแสดงออกของยีน; ความแตกต่างทางพันธุกรรม; การตอบสนองทางสรีรวิทยา; ความเครียด; อากาศร้อน; การทนร้อน; การรักษาสมดุลความร้อน; การปรับปรุงพันธุ์.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5750

ความหลากหลายทางพันธุกรรมของสายพันธุ์ข้าวพื้นเมืองในภาคใต้ของไทยจากลักษณะทางสัณฐานวิทยาของเมล็ดข้าว
Provedor de dados: 106
Autores: Krittika Kaewchumnong; Singtoe Boonrotpong; Sakiya molor.
Seed morphology of 50 local rice varieties in the southern Thailand was studied in length, width, 100 seed weight, colour, and hair of husked seed and length, width, length/width ratio, shape and colour of dehusked seed. Five rice varieties of central Thailand were used as an outgroup. There is variation in all characters measured except the hair of husked seed and colour of dehusked seed. Husked seed width and dehusked seed width and length/width ratio have normal distribution. Dendrogram showing the relationship among rice varieties will be presented in the meeting.
Tipo: Collection
Palavras-chave: Rice; Genetic variation; Local rice varieties; Morphology; Seed; Southern region; Thailand; ข้าว; พันธุ์พื้นเมือง; ความหลกหลายทางพันธุกรรม; สัณฐานวิทยา; เมล็ดข้าว; ภาคใต้.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5347