Data/hora: 03/06/2024 18:08:08

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 05/10/2010
Data da última atualização: | 19/04/2018
Autoria: | GOUVÊA, L. R. L.; CHIORATO, A. F.; GONÇALVES, P. de S.
Afiliação: | Lígia Regina Lima Gouvêa, Instituto Agronômico (IAC); Alisson Fernando Chiorato, IAC, Centro de Pesquisa e Desenvolvimento de Recursos Genéticos Vegetais; Paulo de Souza Gonçalves, Instituto Agronômico (IAC).
Título: | Divergence and genetic variability among superior rubber tree genotypes.
Ano de publicação: | 2010
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 2, p. 163-170, fev. 2010
Idioma: | Inglês
Notas: | Título em português: Divergência e variabilidade genética de genótipos superiores de seringueira.
Conteúdo: | 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.
Palavras-Chave: | Selection.
Thesagro: | Cruzamento; Hevea Brasiliensis; Método estatístico; Seleção.
Thesaurus Nal: | Crossing; Multivariate analysis.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/105860/1/Divergence.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (48269-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS