Agro-morphological characterization and genetic divergence assessment in bush snap bean genotypes
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Data
2017-06-30
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Universidade Federal de Goiás
Resumo
The characterization and identification of genetically
divergent parents for crosses are important tasks in snap bean
breeding programs, for a greater availability of cultivars to
growers. This study aimed at characterizing bush snap bean
genotypes originating from different countries; assessing the
genetic divergence between the genotypes and the genetic
variability extent, concerning 12 agro-morphological traits;
and determining the relative importance of these traits for
the genetic divergence. The experiment was conducted in a
randomized complete block design, with 29 genotypes and four
replications. The UPGMA and Tocher optimization methods,
both based on the generalized distance of Mahalanobis, and
the canonical variables method were used to analyze the
genetic divergence. The genotypes exhibited a wide range of
genetic variability for the agro-morphological traits evaluated,
mainly for 100-seed weight, aspect and yield of commercial
pods, plant height at harvest and pod weight. A high genetic
divergence was detected between the genotypes, in which
the 100-seed weight and aspect of commercial pods were the
most important traits for clustering. Some genotypes own
desirable characteristics for these and other traits, given the
favorable genetic associations between traits. The snap bean
genotypes originated from different countries tended to cluster
together, indicating that similar germplasm is shared among
different countries, thus suggesting a strong trans-national
seed exchange.
Descrição
Palavras-chave
Phaseolus vulgaris, Produtividade e aspecto de vagens comerciáveis, Variabilidade genética, Phaseolus vulgaris, Yield and aspect of commercial pods, Genetic variability
Citação
VAZ, Daniela da Costa; MORAIS JÚNIOR, Odilon Peixoto de; PEIXOTO, Nei. Agro-morphological characterization and genetic divergence assessment in bush snap bean genotypes. Pesquisa Agropecuária Tropical, Goiânia, v. 47, n. 2, p. 134–144, Apr./Jun. 2017. Disponível em: https://revistas.ufg.br/pat/article/view/43525. Acesso em: 10 out. 2022.