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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
11/10/2018 |
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Data da última atualização: |
11/10/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALBUQUERQUE, H. Y. G. de; CARMO, C. D. do; BRITO, A. C.; OLIVEIRA, E. J. de. |
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Afiliação: |
HILÇANA YLKA GONÇALVES DE ALBUQUERQUE, UFRB; CATIA DIAS DO CARMO, UFRB; ANA CARLA BRITO; EDER JORGE DE OLIVEIRA, CNPMF. |
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Título: |
Genetic diversity of Manihot esculenta Crantz germplasm based on single-nucleotide polymorphism markers. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Annals Applied Biology, p. 1-14, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Cassava (Manihot esculenta Crantz) is a species whose natural diversity has great food, industrial and energy potential. This study aimed to evaluate the genetic diversity, and population structure of 1,580 accessions belonging to the international germplasm conserved in Brazil using 20,601 single?nucleotide polymorphism markers. The average values of polymorphic information content (PIC), inbreeding (f), observed heterozygosity (Ho) and expected heterozygosity (He) were 0.24, 0.21, 0.23 and 0.30, respectively, presenting levels of genetic diversity compatible with the nature of the marker (predominantly biallelic) and with the species reproductive system. The mean values of He, Ho, PIC and f were similar for the 18 chromosomes of the species. At the individual level, f values ranged from 0.49 to 0.97, with an average of 0.69, whereas some cassava accessions showed f?>?0.90. The values of linkage disequilibrium ranged from 15 to 20?kb (r2?=?0.20). In the discriminant analysis of principal components (DAPC), 22 groups were formed with probabilities of assignment of individuals above 0.99. No association was observed between DAPC grouping and clusters based on phenotypic data (cyanogenic compound content and colour of the root pulp) and on genetic and geographic origin. However, the DAPC grouping resulted in greater variation between groups (14.85%). This information suggests extensive exchange of cassava germplasm in Brazil and wide molecular and phenotypic diversity. These results will provide a better understanding of the preserved genetic variability and the population organisation of the germplasm. MenosCassava (Manihot esculenta Crantz) is a species whose natural diversity has great food, industrial and energy potential. This study aimed to evaluate the genetic diversity, and population structure of 1,580 accessions belonging to the international germplasm conserved in Brazil using 20,601 single?nucleotide polymorphism markers. The average values of polymorphic information content (PIC), inbreeding (f), observed heterozygosity (Ho) and expected heterozygosity (He) were 0.24, 0.21, 0.23 and 0.30, respectively, presenting levels of genetic diversity compatible with the nature of the marker (predominantly biallelic) and with the species reproductive system. The mean values of He, Ho, PIC and f were similar for the 18 chromosomes of the species. At the individual level, f values ranged from 0.49 to 0.97, with an average of 0.69, whereas some cassava accessions showed f?>?0.90. The values of linkage disequilibrium ranged from 15 to 20?kb (r2?=?0.20). In the discriminant analysis of principal components (DAPC), 22 groups were formed with probabilities of assignment of individuals above 0.99. No association was observed between DAPC grouping and clusters based on phenotypic data (cyanogenic compound content and colour of the root pulp) and on genetic and geographic origin. However, the DAPC grouping resulted in greater variation between groups (14.85%). This information suggests extensive exchange of cassava germplasm in Brazil and wide molecular and phenotypic diversity. These r... Mostrar Tudo |
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Thesagro: |
Mandioca. |
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Thesaurus Nal: |
Cassava; Population structure; Variability. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02240naa a2200205 a 4500
001 2097243
005 2018-10-11
008 2018 bl uuuu u00u1 u #d
100 1 $aALBUQUERQUE, H. Y. G. de
245 $aGenetic diversity of Manihot esculenta Crantz germplasm based on single-nucleotide polymorphism markers.$h[electronic resource]
260 $c2018
520 $aCassava (Manihot esculenta Crantz) is a species whose natural diversity has great food, industrial and energy potential. This study aimed to evaluate the genetic diversity, and population structure of 1,580 accessions belonging to the international germplasm conserved in Brazil using 20,601 single?nucleotide polymorphism markers. The average values of polymorphic information content (PIC), inbreeding (f), observed heterozygosity (Ho) and expected heterozygosity (He) were 0.24, 0.21, 0.23 and 0.30, respectively, presenting levels of genetic diversity compatible with the nature of the marker (predominantly biallelic) and with the species reproductive system. The mean values of He, Ho, PIC and f were similar for the 18 chromosomes of the species. At the individual level, f values ranged from 0.49 to 0.97, with an average of 0.69, whereas some cassava accessions showed f?>?0.90. The values of linkage disequilibrium ranged from 15 to 20?kb (r2?=?0.20). In the discriminant analysis of principal components (DAPC), 22 groups were formed with probabilities of assignment of individuals above 0.99. No association was observed between DAPC grouping and clusters based on phenotypic data (cyanogenic compound content and colour of the root pulp) and on genetic and geographic origin. However, the DAPC grouping resulted in greater variation between groups (14.85%). This information suggests extensive exchange of cassava germplasm in Brazil and wide molecular and phenotypic diversity. These results will provide a better understanding of the preserved genetic variability and the population organisation of the germplasm.
650 $aCassava
650 $aPopulation structure
650 $aVariability
650 $aMandioca
700 1 $aCARMO, C. D. do
700 1 $aBRITO, A. C.
700 1 $aOLIVEIRA, E. J. de
773 $tAnnals Applied Biology, p. 1-14, 2018.
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| 1. |  | PEREIRA, M. E. C.; SOUZA, E. G.; NUMES, A. A.; SANTOS, C. da C. dos; SANTOS, F. P. de O.; SILVA, L. B. Parâmetros de qualidade de frutos de bananeira 'Prata-Anã' em função da posição da penca no cacho. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 21, 2010, Natal. Frutas: saúde, inovação e responsabilidade: anais. Natal: Sociedade Brasileira de Fruticultura, 2010. pdf 1025| Tipo: Artigo em Anais de Congresso |
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