Data/hora: 03/06/2024 18:03:30

Provedor de dados: | 86
País: | Brazil
Título: | Divergence and genetic variability among superior rubber tree genotypes
Autores: | Gouvêa,Lígia Regina Lima; Chiorato,Alisson Fernando; Gonçalves,Paulo de Souza.
Data: | 2010-02-01
Ano: | 2010
Palavras-chave: | Hevea brasiliensis; Crossbreeding; Multivariate analysis; Selection.
Resumo: | The objective of this work was to estimate the genetic variability and divergence among 22 superior rubber tree (Hevea sp.) genotypes of the IAC 400 series. Univariate and multivariate analyses were performed using eight quantitative traits (descriptors), including yield. In the univariate analyses, the estimated parameters were: genetic and environmental variances; genetic and environmental coefficients of variation; and the variation index. The Mahalanobis generalized distance, the Tocher agglomerative method and canonical variables were used for the multivariate analyses. In the univariate analyses, variability was verified among the genotypes for all the variables evaluated. The Tocher method grouped the genotypes into 11 clusters of dissimilarity. The first four canonical variables explained 87.93% of the cumulative variation. The highest genetic variability was found in rubber yield-related traits, which contributed the most to the genetic divergence. The most divergent pairs of genotypes are suggested for crossbreeding. The genotypes evaluated are suitable for breeding and may be used to continue the IAC rubber tree breeding program.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000200007

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2010000200007
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.45 n.2 2010
Fonte: | info:eu-repo/semantics/openAccess