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| Registros recuperados : 200 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental; Embrapa Cocais. |
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Data corrente: |
15/08/2017 |
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Data da última atualização: |
26/01/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
SOUSA, S. B.; SILVA, G. F. da; DIAS, M. C.; CLEMENT, C. R.; SOUSA, N. R. |
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Afiliação: |
INPA; GILVAN FERREIRA DA SILVA, CPAA; MIGUEL COSTA DIAS, CPAA; INPA; NELCIMAR REIS SOUSA, CPACP. |
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Título: |
Farmer variety exchange along Amazonian rivers influences the genetic structure of manioc maintained in a regional Brazilian GeneBank. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 16, n. 3, July 2017. |
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DOI: |
http://dx.doi.org/10.4238/gmr16039690 |
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Idioma: |
Inglês |
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Conteúdo: |
Knowledge of agro-morphological and genetic variability of germplasm diversity is a prerequisite for its use in breeding. The aim of this study was to characterize the genetic diversity of the manioc (Manihot esculenta) Active Germplasm Bank (AGB) at Embrapa Amazônia Ocidental using microsatellite markers. We evaluated 470 accessions collected along five of the main rivers of the Amazon basin: Solimões, Purus, Madeira, Negro, and Amazon. The ten SSR loci used showed high levels of genetic diversity, the polymorphism information content ranged from 0.35 to 0.84, and the mean number of alleles per locus was 11.3. Accessions from the Madeira River had a higher Shannon index (1.52), as well as the largest number of private alleles (19). Bayesian inference of genetic structure implemented in the Structure software suggested the existence of two groups of accessions without clear association with river basins. The accumulated variation in the first two axes of the principal coordinate analysis revealed low genetic divergence between these groups, while AMOVA identified most of the molecular variance within the groups. Farmer exchange of varieties along and among rivers probably explains the lack of structure. Although the manioc AGB of Embrapa Amazônia Ocidental contains abundant genetic diversity, no differentiation was found between the groups studied. |
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Palavras-Chave: |
Diversidade genética; Manioc. |
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Thesagro: |
Germoplasma; Mandioca; Manihot Esculenta. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/162829/1/gmr-16-03-gmr.16039690.pdf
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Marc: |
LEADER 02136naa a2200241 a 4500
001 2074207
005 2018-01-26
008 2017 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.4238/gmr16039690$2DOI
100 1 $aSOUSA, S. B.
245 $aFarmer variety exchange along Amazonian rivers influences the genetic structure of manioc maintained in a regional Brazilian GeneBank.$h[electronic resource]
260 $c2017
520 $aKnowledge of agro-morphological and genetic variability of germplasm diversity is a prerequisite for its use in breeding. The aim of this study was to characterize the genetic diversity of the manioc (Manihot esculenta) Active Germplasm Bank (AGB) at Embrapa Amazônia Ocidental using microsatellite markers. We evaluated 470 accessions collected along five of the main rivers of the Amazon basin: Solimões, Purus, Madeira, Negro, and Amazon. The ten SSR loci used showed high levels of genetic diversity, the polymorphism information content ranged from 0.35 to 0.84, and the mean number of alleles per locus was 11.3. Accessions from the Madeira River had a higher Shannon index (1.52), as well as the largest number of private alleles (19). Bayesian inference of genetic structure implemented in the Structure software suggested the existence of two groups of accessions without clear association with river basins. The accumulated variation in the first two axes of the principal coordinate analysis revealed low genetic divergence between these groups, while AMOVA identified most of the molecular variance within the groups. Farmer exchange of varieties along and among rivers probably explains the lack of structure. Although the manioc AGB of Embrapa Amazônia Ocidental contains abundant genetic diversity, no differentiation was found between the groups studied.
650 $aGermoplasma
650 $aMandioca
650 $aManihot Esculenta
653 $aDiversidade genética
653 $aManioc
700 1 $aSILVA, G. F. da
700 1 $aDIAS, M. C.
700 1 $aCLEMENT, C. R.
700 1 $aSOUSA, N. R.
773 $tGenetics and Molecular Research$gv. 16, n. 3, July 2017.
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Registro original: |
Embrapa Amazônia Ocidental (CPAA) |
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