Genetic divergence in sesame based on morphological and agronomic traits
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Data
2007-09-01
Autores
Arriel, Nair Helena Castro
Di Mauro, Antonio Orlando [UNESP]
Arriel, Eder Ferreira [UNESP]
Unêda-Trevisoli, Sandra Helena
Costa, Marcelo Marchi [UNESP]
Bárbaro, Ivana Marino
Muniz, Franco Romero Silva [UNESP]
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Resumo
The evaluation of diversity in germplasm collections is important for both plant breeders and germplasm curators to optimize the use of the variability available. Diversity can be estimated by different genetic markers. The purpose of this study was to estimate the genetic divergence of 30 morphological and agronomic traits in 108 sesame genotypes by multivariate analysis. The Cole-Rodgers index was used to establish the dissimilarity matrices. The principal component analysis identified the traits that contributed most to the divergence and the genotypes were clustered by Tocher's optimization. Despite the narrow genetic basis, the markers were efficient to characterize the genotypes and identify the most similar groups or duplicate and divergent genotypes. Greatest variation was found for the traits number of capsules per plant and grain yield.
Descrição
Palavras-chave
Genetic diversity, Germplasm, Multivariate analysis, Sesamum indicum L., Sesamum indicum
Como citar
Crop Breeding and Applied Biotechnology, v. 7, n. 3, p. 253-261, 2007.