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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Genetic diversity analysis among pigeonpea genotypes adapted to South American regions based on microsatellite markers.
Autores:  SOUSA, A. C. B.
GODOY, R.
SFORÇA, D. A.
CAMPOS, T. de
ZUCCHI, M. I.
JANK, L.
SOUZA, A. P. de
Data:  2011-10-05
Ano:  2011
Palavras-chave:  Inferência bayesiana
Bayesian inference
Sofware Structure
Guandu
Cajanus cajan
Variação genética
Marcador genético
Polimorfismo genético
Feijão
Phaseolus vulgaris
Feijão de corda
Vigna unguiculata
Método estatístico
Modelo de simulação
Pigeon peas
Genetic variation
Guandul
Genetic markers
Statistical analysis
Genetic polymorphism
Beans
Computer simulation
Variación genética
Marcadores genéticos
Análisis estadístico
Frijoles
Simulación por computadora
Resumo:  The pigeonpea [Cajanus cajan (L) Millspaugh] is one of the most important perennial legume crops utilized in the food, fodder, soil conservation, crop-livestock integrated systems, reclaiming of degraded pastures and symbiotic nitrogen fixation. Microsatellite markers were used to estimate the genetic diversity of 77 pigeonpea genotypes selected from the germplasm collections at Embrapa Cattle-Southeast and, to evaluate their transferability to Phaseolus vulgaris and Vigna unguiculata species. The number of alleles per locus ranged from 2 to12, with an average of 5.1 alleles. The PIC values ranged from 0.11 to 0.80 (average 0.49) and the D values from 0.23 to 0.91 (average 0.58). The averages of observed and expected heterozygosity were 0.25 and 0.47, respectively, showing a deficit in heterozygosity. A model-based Bayesian approach implemented in the software STRUCTURE was used to assign genotypes into clusters. A dendrogram was constructed based on the modified Roger?s genetic distances using a neighbor-joining method (NJ). A total of four clusters were assembled by STRUCTURE and a strong tendency of correspondence between the Bayesian clusters in the NJ tree was observed. The genetic distance ranged from 0.09 to 0.62 (average 0.37), showing a low genetic diversity in the pigeonpea genotypes. Transferability of pigeonpea-specific microsatellites revealed a cross-amplification and the presence of polymorphic alleles in P. vulgaris and V. unguiculata.

2011
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  23954

http://www.alice.cnptia.embrapa.br/handle/doc/902585

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/56519/1/23954.pdf
Editor:  Scientia Agricola, Piracicaba, v. 68, n. 4, p. 431-439, July/Aug. 2011.
Relação:  Embrapa Acre - Artigo em periódico indexado (ALICE)
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