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| Registros recuperados : 294 | |
| 11. |  | FIALHO, J. de F.; VIEIRA, E. A. (ed.). Mandioca no cerrado: orientações técnicas. 2. ed. rev. e ampl. Brasília, DF: Embrapa, 2013. 203 p. Autores: Camila Ferreira Lobo, CNPq; Charles Martins de Oliveira, CPAC; Eduardo Alano Vieira, CPAC; Francisco Duarte Fernandes, CPAC; José de Ribamar Nazareno dos Anjos, CPAC; Josefino de Freitas Fialho, CPAC; Jozeneida Lúcia Pimenta de...| Biblioteca(s): Embrapa Amazônia Ocidental; Embrapa Cerrados; Embrapa Meio-Norte; Embrapa Unidades Centrais. |
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| 12. | | VIEIRA, E. A.; FIALHO, J. de F.; SILVA, M. S. Estado da arte e estratégias do melhoramento participativo: o exemplo da mandioca no Cerrado. In: FALEIRO, F. G.; FARIAS NETO, A. L. de; RIBEIRO JÚNIOR, W. Q. (Ed.). Pré-melhoramento, melhoramento e pós-melhoramento: estratégias e desafios. Planaltina, DF: Embrapa Cerrados, 2008. cap. 7, p. 107-124.| Biblioteca(s): Embrapa Cerrados. |
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| 13. | | CHAIB-FERREIRA, A.; VIEIRA, E. A.; FIALHO, J. de F. Estratégia para a geração de uma coleção nuclear do banco regional de germoplasma de mandioca do Cerrado In: ENCONTRO DE JOVENS TALENTOS DA EMBRAPA CERRADOS, 4., 2009, Planaltina, DF. Resumos apresentados... Planaltina, DF: Embrapa Cerrados, 2009. p. 25-26. (Embrapa Cerrados. Documentos, 243).| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 294 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Cerrados; Embrapa Mandioca e Fruticultura; Embrapa Semiárido. |
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Data corrente: |
07/05/2019 |
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Data da última atualização: |
21/10/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
ALBUQUERQUE, H. Y. G. de; OLIVEIRA, E. J. de; BRITO, A. C.; ANDRADE, L. R. B. de; CARMO, C. D. do; MORGANTE, C. V.; VIEIRA, E. A.; CUNHA, E. F. M.; FALEIRO, F. G. |
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Afiliação: |
HILÇANA YLKA GONÇALVES DE ALBUQUERQUE, UFRB; EDER JORGE DE OLIVEIRA, CNPMF; ANA CARLA BRITO; LUCIANO ROGÉRIO BRAATZ DE ANDRADE, UFV; CÁTIA DIAS DO CARMO, UFRB; CAROLINA VIANNA MORGANTE, CPATSA; EDUARDO ALANO VIEIRA, CPAC; ELISA FERREIRA MOURA CUNHA, CPATU; FABIO GELAPE FALEIRO, CPAC. |
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Título: |
Identification of duplicates in cassava germplasm banks based on single-nucleotide polymorphisms (SNPs). |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Scientia Agricola, v. 76, n. 4, p. 328-336, jul./aug., 2019. |
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Idioma: |
Inglês |
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Conteúdo: |
Genetic redundancy in cassava (Manihot esculenta Crantz) presents a challenge to efficient management of genetic resources. This study aimed to identify and define the ge-netic structure of duplicates in cassava germplasm from various Embrapa research units, using single-nucleotide polymorphism (SNP) markers. We evaluated 2,371 accessions with 20,712 SNPs. The identification of duplicates was performed based on multilocus genotypes (MLG), adopting a maximum genetic distance threshold of 0.05. The population structure was defined based on discriminant analysis of principal components (DAPC). A total of 1,757 unique and 614 duplicate accessions were identified. The redundancy of the collections ranged from 17% (Belém, PA/Brazil) to 39% (Petrolina, PE/Brazil), with an average of 21%. This redundancy between different research units is probably due to the historical sharing of accessions, as well as collections carried out in the same region, or even to the intense germplasm exchange between farmers with different genotype names. In terms of genetic structure, the 250 principal components explained 88 % of the genetic variation of the SNP markers and defined the hierar-chical structure of the duplicate cassava germplasm in 12 groups. Since heterotic groups have not yet been identified for cassava, crosses between accessions of the 12 DAPC groups may be promising. All MLGs were allocated within the same DAPC group, corroborating duplicate analyses yet still revealing high variability between groups that were quite distinct based on the first two discriminant functions. Our results contribute to optimizing the conservation of genetic resources, together with understanding diversity and its use in crop improvement. MenosGenetic redundancy in cassava (Manihot esculenta Crantz) presents a challenge to efficient management of genetic resources. This study aimed to identify and define the ge-netic structure of duplicates in cassava germplasm from various Embrapa research units, using single-nucleotide polymorphism (SNP) markers. We evaluated 2,371 accessions with 20,712 SNPs. The identification of duplicates was performed based on multilocus genotypes (MLG), adopting a maximum genetic distance threshold of 0.05. The population structure was defined based on discriminant analysis of principal components (DAPC). A total of 1,757 unique and 614 duplicate accessions were identified. The redundancy of the collections ranged from 17% (Belém, PA/Brazil) to 39% (Petrolina, PE/Brazil), with an average of 21%. This redundancy between different research units is probably due to the historical sharing of accessions, as well as collections carried out in the same region, or even to the intense germplasm exchange between farmers with different genotype names. In terms of genetic structure, the 250 principal components explained 88 % of the genetic variation of the SNP markers and defined the hierar-chical structure of the duplicate cassava germplasm in 12 groups. Since heterotic groups have not yet been identified for cassava, crosses between accessions of the 12 DAPC groups may be promising. All MLGs were allocated within the same DAPC group, corroborating duplicate analyses yet still revealing high variabi... Mostrar Tudo |
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Palavras-Chave: |
Cultivo. |
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Thesagro: |
Mandioca; Manihot Esculenta; Melhoramento Vegetal. |
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Thesaurus NAL: |
Breeding; Breeding and Genetic Improvement; Cassava. |
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Categoria do assunto: |
--
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/199859/1/Indetification-2019.pdf
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Marc: |
LEADER 02636naa a2200301 a 4500
001 2110860
005 2020-10-21
008 2019 bl uuuu u00u1 u #d
100 1 $aALBUQUERQUE, H. Y. G. de
245 $aIdentification of duplicates in cassava germplasm banks based on single-nucleotide polymorphisms (SNPs).$h[electronic resource]
260 $c2019
520 $aGenetic redundancy in cassava (Manihot esculenta Crantz) presents a challenge to efficient management of genetic resources. This study aimed to identify and define the ge-netic structure of duplicates in cassava germplasm from various Embrapa research units, using single-nucleotide polymorphism (SNP) markers. We evaluated 2,371 accessions with 20,712 SNPs. The identification of duplicates was performed based on multilocus genotypes (MLG), adopting a maximum genetic distance threshold of 0.05. The population structure was defined based on discriminant analysis of principal components (DAPC). A total of 1,757 unique and 614 duplicate accessions were identified. The redundancy of the collections ranged from 17% (Belém, PA/Brazil) to 39% (Petrolina, PE/Brazil), with an average of 21%. This redundancy between different research units is probably due to the historical sharing of accessions, as well as collections carried out in the same region, or even to the intense germplasm exchange between farmers with different genotype names. In terms of genetic structure, the 250 principal components explained 88 % of the genetic variation of the SNP markers and defined the hierar-chical structure of the duplicate cassava germplasm in 12 groups. Since heterotic groups have not yet been identified for cassava, crosses between accessions of the 12 DAPC groups may be promising. All MLGs were allocated within the same DAPC group, corroborating duplicate analyses yet still revealing high variability between groups that were quite distinct based on the first two discriminant functions. Our results contribute to optimizing the conservation of genetic resources, together with understanding diversity and its use in crop improvement.
650 $aBreeding
650 $aBreeding and Genetic Improvement
650 $aCassava
650 $aMandioca
650 $aManihot Esculenta
650 $aMelhoramento Vegetal
653 $aCultivo
700 1 $aOLIVEIRA, E. J. de
700 1 $aBRITO, A. C.
700 1 $aANDRADE, L. R. B. de
700 1 $aCARMO, C. D. do
700 1 $aMORGANTE, C. V.
700 1 $aVIEIRA, E. A.
700 1 $aCUNHA, E. F. M.
700 1 $aFALEIRO, F. G.
773 $tScientia Agricola$gv. 76, n. 4, p. 328-336, jul./aug., 2019.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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