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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
10/08/2011 |
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Data da última atualização: |
31/01/2012 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VIGNA, B. B. Z.; JUGMANN, L.; FRANCISCO, P. M.; ZUCCHI, M. I.; VALLE, C. B. do; SOUZA, A. P. de. |
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Afiliação: |
Bianca Baccili Zanotto Vigna, UNICAMP; LETICIA JUNGMANN CANCADO, CNPGC; Patrícia Mara Francisco, UNICAMP; Maria Imaculada Zucchi, INSTITUTO AGRONÔMICO DE CAMPINAS; CACILDA BORGES DO VALLE, CNPGC; Anete Pereira de Souza, UNICAMP. |
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Título: |
Genetic diversity and population structure of the Brachiaria brizantha germplasm. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Tropical Plant Biology, v.4, n.3-4, p.157-169, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Brachiaria brizantha (Hochst. ex A. Rich.) Stapf. (syn. Urochloa brizantha (Hochst. ex A. Rich.) R.D. Webster) is a species used primarily as forage in tropical America and Southeast Asia. B. brizantha has been extensively researched since the 1980s with the initiation of the Tropical Forages Breeding Program conducted by the Brazilian Agricultural Research Corporation (Empresa Brasileira de Pesquisa Agropecuária; EMBRAPA), holding one of the largest germplasm collections in the world. This work has identified 15 new microsatellite markers for this species, which have been used in addition to five previously reported markers, to estimate the genetic similarities among 172 accessions and six cultivars of this species. Similarity index values ranged from 0.40 to 1.00. Two duplications were found in the germplasm. A Bayesian analysis performed using the STRUCTURE 2.3.3 program revealed the presence of three clusters with different allelic pools. This analysis is valuable for the performance of crosses to explore heterosis; however, the mode of reproduction of the accessions and ploidy barriers must be observed for effective exploration. A grouping analysis using the neighbor-joining method was consistent with the STRUCTURE analysis, and a combination approach suggested that this germplasm collection does not exhibit considerable genetic variability despite the presence of three distinct allelic pools. The lack of correlation between the genetic and geographic distances is also discussed. MenosBrachiaria brizantha (Hochst. ex A. Rich.) Stapf. (syn. Urochloa brizantha (Hochst. ex A. Rich.) R.D. Webster) is a species used primarily as forage in tropical America and Southeast Asia. B. brizantha has been extensively researched since the 1980s with the initiation of the Tropical Forages Breeding Program conducted by the Brazilian Agricultural Research Corporation (Empresa Brasileira de Pesquisa Agropecuária; EMBRAPA), holding one of the largest germplasm collections in the world. This work has identified 15 new microsatellite markers for this species, which have been used in addition to five previously reported markers, to estimate the genetic similarities among 172 accessions and six cultivars of this species. Similarity index values ranged from 0.40 to 1.00. Two duplications were found in the germplasm. A Bayesian analysis performed using the STRUCTURE 2.3.3 program revealed the presence of three clusters with different allelic pools. This analysis is valuable for the performance of crosses to explore heterosis; however, the mode of reproduction of the accessions and ploidy barriers must be observed for effective exploration. A grouping analysis using the neighbor-joining method was consistent with the STRUCTURE analysis, and a combination approach suggested that this germplasm collection does not exhibit considerable genetic variability despite the presence of three distinct allelic pools. The lack of correlation between the genetic and geographic distances is also ... Mostrar Tudo |
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Thesagro: |
Brachiaria Brizantha; Melhoramento Genético Vegetal; Pastagem. |
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Thesaurus Nal: |
Urochloa brizantha. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02191naa a2200229 a 4500
001 1897729
005 2012-01-31
008 2011 bl uuuu u00u1 u #d
100 1 $aVIGNA, B. B. Z.
245 $aGenetic diversity and population structure of the Brachiaria brizantha germplasm.$h[electronic resource]
260 $c2011
520 $aBrachiaria brizantha (Hochst. ex A. Rich.) Stapf. (syn. Urochloa brizantha (Hochst. ex A. Rich.) R.D. Webster) is a species used primarily as forage in tropical America and Southeast Asia. B. brizantha has been extensively researched since the 1980s with the initiation of the Tropical Forages Breeding Program conducted by the Brazilian Agricultural Research Corporation (Empresa Brasileira de Pesquisa Agropecuária; EMBRAPA), holding one of the largest germplasm collections in the world. This work has identified 15 new microsatellite markers for this species, which have been used in addition to five previously reported markers, to estimate the genetic similarities among 172 accessions and six cultivars of this species. Similarity index values ranged from 0.40 to 1.00. Two duplications were found in the germplasm. A Bayesian analysis performed using the STRUCTURE 2.3.3 program revealed the presence of three clusters with different allelic pools. This analysis is valuable for the performance of crosses to explore heterosis; however, the mode of reproduction of the accessions and ploidy barriers must be observed for effective exploration. A grouping analysis using the neighbor-joining method was consistent with the STRUCTURE analysis, and a combination approach suggested that this germplasm collection does not exhibit considerable genetic variability despite the presence of three distinct allelic pools. The lack of correlation between the genetic and geographic distances is also discussed.
650 $aUrochloa brizantha
650 $aBrachiaria Brizantha
650 $aMelhoramento Genético Vegetal
650 $aPastagem
700 1 $aJUGMANN, L.
700 1 $aFRANCISCO, P. M.
700 1 $aZUCCHI, M. I.
700 1 $aVALLE, C. B. do
700 1 $aSOUZA, A. P. de
773 $tTropical Plant Biology$gv.4, n.3-4, p.157-169, 2011.
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