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Registros recuperados: 39 | |
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VIEIRA, E. A.; CARVALHO, F. I. F. de; BERTAN, I.; KOPP, M. M.; ZIMMER, P. D.; BENIN, G.; SILVA, J. A. G. da; HARTWIG, I.; MALONE, G.; OLIVEIRA, A. C. de. |
Tipo: Separatas |
Palavras-chave: Divergência genética; Genetic divergence; Molecular marker.; Marcador Molecular; Triticum Aestivum.; Trigo; Wheat.. |
Ano: 2007 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/559343 |
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Vieira,Eduardo Alano; Carvalho,Fernando Irajá Félix de; Bertan,Ivandro; Kopp,Mauricio Marini; Zimmer,Paulo Dejalma; Benin,Giovani; Silva,José Antônio Gonzalez da; Hartwig,Irineu; Malone,Gaspar; Oliveira,Antônio Costa de. |
Molecular and morphological data analyses matrices are very informative tools for the estimation of genetic distances. We used AFLP markers, morphological traits and combined analysis to estimate the genetic distances between wheat genotypes and ascertain any associations between the two techneques. Nineteen wheat (Triticum aestivum L.) genotypes were analyzed using amplified fragment length polymorphism (AFLP) markers and field evaluated for two years. The matrices obtained by morphological and molecular marker data analyses revealed a significant but moderate correlation (r = 0.47), indicating that such techniques sample distinct genome regions. The combined analysis was found to be highly correlated with AFLP (r = 0.97) and moderately correlated with... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reeding; Genetic divergence; Molecular markers; Morphological traits. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300016 |
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Lupchinski Junior, Enio; UEM; Vargas, Lauro; UEM; Povh, Jayme Aparecido; UEM; Ribeiro, Ricardo Pereira; UEM; Mangolin, Claudete Aparecida; UEM; Barrero, Nelson Maurício Lopera; UEM. |
Este trabalho teve como objetivo analisar, pela técnica RAPD, a variabilidade e a divergência genética de duas gerações da linhagem GIFT. Foram estimados parâmetros para os reprodutores (G0) e para a progênie (F1). A variabilidade genética foi determinada pela porcentagem de loci polimórficos e pelo índice de Shannon. As gerações apresentaram 69,6% de loci polimórficos (G0) e 60,0% de polimorfismo (F1). Os valores para o índice de Shannon foram de 0,367 para a geração G0 e de 0,317 para a F1. Os valores de divergência genética, calculados pelo teste de Mantel, foram de 0,213 para a G0 e 0,208 para a geração F1. Os resultados obtidos indicaram que houve perda da variabilidade genética da geração G0 para a F1. No entanto, um fato a ser destacado foi a alta... |
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Palavras-chave: 5.05.04.00-2 Reprodução Animal índice de Shannon; Gerações de cultivo; Divergência genética; Variabilidade genética. Shannon index; Cultivated generations; Genetic divergence; Genetic variability. |
Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4708 |
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Meyer,Andréia da Silva; Garcia,Antonio Augusto Franco; Souza,Anete Pereira de; Souza Jr.,Cláudio Lopes de. |
The objective of this study was to evaluate whether different similarity coefficients used with dominant markers can influence the results of cluster analysis, using eighteen inbred lines of maize from two different populations, BR-105 and BR-106. These were analyzed by AFLP and RAPD markers and eight similarity coefficients were calculated: Jaccard, Sorensen-Dice, Anderberg, Ochiai, Simple-matching, Rogers and Tanimoto, Ochiai II and Russel and Rao. The similarity matrices obtained were compared by the Spearman correlation, cluster analysis with dendrograms (UPGMA, WPGMA, Single Linkage, Complete Linkage and Neighbour-Joining methods), the consensus fork index between all pairs of dendrograms, groups obtained through the Tocher optimization procedure and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic divergence; Heterotic groups; AFLP; RAPD; Multivariate analysis. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100014 |
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Techio,Vânia Helena; Davide,Lisete Chamma; Pereira,Antônio Vander; Bearzoti,Eduardo. |
Cytotaxonomic studies were carried out on 26 accessions of Pennisetum spp. originating from the Active Germplasm Bank of Embrapa Gado de Leite-Juiz de Fora, Minas Gerais, Brazil.This study presents cytogenetics and reproductive morphological data for each one of these accessions, which allowed groupings and suggest botanical identifications to be established. The metaphases of the accessions characterized as P. purpureum confirmed the presence of 2n = 28 chromosomes that have already been described for this species. For the hybrids between P. purpureum and P. glaucum and for the hexaploids, resulting from the chromosome duplication of these hybrids, 2n = 21 and 2n = 42 chromosomes were confirmed, respectively. The wild accession identified as P. setosum... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum; Cytogenetic; Taxonomy; Germplasm; Genetic divergence. |
Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200014 |
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Arnaud-haond, Sophie; Moalic, Yann; Hernandez-garcia, Emilio; Eguiluz, Victor M.; Alberto, Filipe; Serrao, Ester A.; Duarte, Carlos M.. |
The recurrent lack of isolation by distance reported at regional scale in seagrass species was recently suggested to stem from stochastic events of large-scale dispersal. We explored the usefulness of phylogenetic information contained in microsatellite loci to test this hypothesis by using the Genetic Diversity Spectrum (GDS) on databases containing, respectively, 7 and 9 microsatellites genotypes for 1541 sampling units of Posidonia oceanica and 1647 of Cymodocea nodosa. The simultaneous increase of microsatellite and geographic distances that emerges reveals a coherent pattern of isolation by distance in contrast to the chaotic pattern previously described using allele frequencies, in particular, for the long-lived P. oceanica. These results suggest... |
Tipo: Text |
Palavras-chave: Clonality; Genetic Diversity Spectrum; Genetic divergence; Microsatellites; Seagrass; Stepwise mutation. |
Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00182/29292/27733.pdf |
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YOKOMIZO, G. K.-I.; FARIAS NETO, J. T. de; OLIVEIRA, M. do S. P. de. |
O consumo do suco de açaí tem aumentado no país e no exterior, principalmente por ser um alimento funcional, havendo a necessidade de pesquisas de melhoramento para atender essa crescente demanda. Com o objetivo de avaliar a dissimilaridade para fins de seleção, 30 progênies de meios-irmãos de açaizeiros provenientes do município de Anajás e cultivadas em Tomé-Açu, Pará, foram avaliados para as seguintes características: peso médio do cacho (PMC), em gramas; peso total de frutos (PTF), em gramas; peso médio do cacho vazio (PMCV), em gramas; tamanho médio da ráquis/cacho (TMR), em centímetros; peso médio de 100 frutos (PCF), em gramas; número total de cachos (NTC) e; peso total do cacho (PTC), sendo obtida pela multiplicação entre PMC e NTC. Os resultados... |
Tipo: Artigo de periódico |
Palavras-chave: Divergência genética; Medidas de dissimilaridade; Análise multivariada; UPGMA; Genetic divergence; Dissimilarity measure; Multivariate analisys; Açaí; Euterpe Oleracea; Alimento; Morfologia Vegetal. |
Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1092286 |
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SANTOS, C. A. F.; MENEZES, E. A.; ARAUJO, F. P. de. |
A selecao de progenitores tendo como um dos criterios a distancia genetica, tem sido usada em diversos programas de melhoramento. Os efeitos do ambiente na expressao genica, entretanto, podem influenciar na divergencia, sendo recomendavel a avaliacao dos genotipos em ambientes diferentes. Neste trabalho, 50 acessos de feijao de corda foram avaliados em Petrolina,PE, em dois ambientes distintos: 1) plantio irrigado, no segundo semestre de 1994 (A1), e 2) plantio dependente de chuvas, no primeiro semestre de 1995 (A2). O delineamento foi em blocos ao acaso, com duas repeticoes, sendo as parcelas formadas por uma linha com 16 plantas, no espacamento de 1,0 x 0,5 m, para os dois ambientes. Foram analisados 10 caracteres quantitativos, tendo como medida de... |
Tipo: Artigo de periódico |
Palavras-chave: Divergencia genetica; Genetic divergence; Cowpea; Feijão de corda; Vigna Unguiculata. |
Ano: 1995 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/133141 |
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Silva, Janete Motta da; Aguiar, Ananda Virgínia de; Mori, Edson Seizo; Moraes, Mario Luiz Teixeira de. |
O objetivo desse trabalho foi quantificar a dissimilaridade genética entre progênies de P. caribaea var. caribaea para identificar genitores divergentes, visando gerar genótipos mais produtivos e avaliar a variabilidade total por meio de alguns caracteres fenotípicos de importância comercial. Assim, um teste de progênies de P. caribaea var. caribaea foi implantado em delineamento experimental látice 10 x 10 triplo, com 99 progênies e uma testemunha comercial em Selvíria, MS. Foram avaliados os caracteres quantitativos antes e após desbaste aos 14 anos, tais como: altura total de plantas (m), diâmetro à altura do peito - DAP (cm); volume (m3 árvore-1); forma do fuste das árvores, densidade básica da madeira, na altura do DAP - DBM-1, e na metade da altura... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parâmetros genéticos; Divergência genética; Pinheiros tropicais; Teste de progênies Genetic parameters; Genetic divergence; Tropical pines; Progeny trial. |
Ano: 2012 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/194 |
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Meira,Daniela; Meier,Carine; Olivoto,Tiago; Nardino,Maicon; Klein,Luís Antônio; Moro,Ederson Duranti; Fassini,Fabrício; Marchioro,Volmir Sergio; Souza,Velci Queiróz de. |
ABSTRACT The aims of this study were to characterize black oat populations by estimating between- and within-populations variance components and genetic parameters, as well as to distinguish the populations using multivariable statistics. The experiment was carried out in randomized blocks design with three repetitions, with 14 black oat populations collected in several municipalities of Rio Grande do Sul state. Agronomic important traits were assessed at physiological maturation stage. Variance components and genetic parameters were estimated considering within-block information. In addition, Mahalanobis distance, relative contribution of traits, and canonical variables were used to distinguish the populations. Selection based on panicle length, number of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Genetic divergence; Genotypic variance. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100043 |
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Albuquerque, Amanda Nogueira de; Universidade do Estado do Mato Grosso; Barelli, Marco Antônio Aparecido; Universidade do Estado do Mato Grosso; Neves, Leonarda Grillo; Universidade do Estado do Mato Grosso; Arantes, Vinícius Ribeiro; Universidade do Estado do Mato Grosso; Silva, kleberson Luiz Miranda da; Universidade do Estado do Mato Grosso. |
The morphologic traits of the common bean genotype (Phaseolus vulgaris L.) in Cáceres MT, Brazil, are evaluated to optimize genotypes for future improvement breeding cultures. Sixteen genotypes were evaluated through 33 morphological characters. The experiment was carried out in randomized blocks with four replicates at the Mato Grosso Company for Research and Extension (EMPAER) in Cáceres, Mato Grosso State. A dendrogram was produced by Unweighted Pair Group Method with Arithmetic Mean (UPGMA) and Plan projection. Results showed the occurrence of genetic variability among the genotypes and the dendrogram revealed the formation of two main groups, one comprised genotypes of the black group and the other comprised genotypes of the Cores and Carioca group,... |
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Palavras-chave: 5.01.03.05-9 Phaseolus vulgaris; Morphological description; UPGMA; Genetic divergence Melhoramento Vegetal Phaseolus vulgaris; Morphological description; UPGMA; Genetic divergence. |
Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6944 |
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Miranda,Vicente Savonitti; Farias,Paulo Roberto Silva; Roberto,Sérgio Rufo; Lacava,Pedro Magalhães. |
The Citrus Variegated Chlorosis and the Coffee Leaf Scorch are some of the many destructive diseases caused by Xylella fastidiosa, a gram-negative bacterium limited to the xylem of affected plants. As its genetic characterization is still not well established, different isolates of X. fastidiosa from citrus and coffee were evaluated through RAPD (Random Amplified Polymorphic DNA) technique to characterize and classify these isolates based on similarity coefficients. Sixteen isolates of X. fastidiosa were used on this trial, obtained from citrus, coffee and almond. The genetic polymorphism evaluation was performed using six arbitrary 10-base primer pairs. It was possible to establish a dendogram in which the isolates were classified into five groups (A, B,... |
Tipo: Info:eu-repo/semantics/report |
Palavras-chave: RAPD; Gram-negative bacterium; Genetic divergence. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500005 |
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Scheepmaker, Maarten. |
Genetic differentiation among population samples of G. gauthieri on both sides of the Strait of Gibraltar was investigated by enzyme electrophoresis at 20 enzyme loci with reference to G. gauthieri and G. ibericus from different areas in the Iberian peninsula. Levels of divergence resolved suggest that G. gauthieri reached North Africa from the Iberian peninsula, and not vice versa. With reference to geological evidence, this was likely to occur during the Messinian (6—5 My ago). As the opening of the Strait of Gibraltar represents a well dated geological event, an attempt has been made to calibrate the molecular clock for the G. pulex-group. Indirect estimations of gene flow levels were shown to be extremely low. Probably as a consequence of frequently... |
Tipo: Article / Letter to the editor |
Palavras-chave: Distribution; Genetic divergence; Gene flow; Molecular clock; Gammarus. |
Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/503962 |
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Tavares,Mara Garcia; Dias,Luiz Antonio dos Santos; Borges,Andréia Arantes; Lopes,Denilce Meneses; Busse,Angélica Helene Pereira; Costa,Ronaldo Guimarães; Salomão,Tânia Maria Fernandes; Campos,Lucio Antonio de Oliveira. |
Allozyme, microsatellite and random amplified polymorphic DNA (RAPD) molecular markers were used to investigate the within and between population genetic variability and between population genetic differentiation of the Brazilian stingless bee uruçu amarela (nominally Melipona rufiventris Lepeletier, 1836) present in savanna and Atlantic forest habitats of the Brazilian state of Minas Gerais (MG). We found low levels of within population variability, although there were a large number of private alleles that specifically characterized these populations. The F ST values indicated a high level of genetic diversity between populations. Analysis of molecular variance (AMOVA) showed a high degree of population differentiation between the savanna and Atlantic... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endangered species; Genetic divergence; Molecular markers; Stingless bees; Uruçu amarela. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400027 |
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Registros recuperados: 39 | |
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