Adaptabilidade e estabilidade de acessos de uma coleção nuclear de arroz
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Data
2012-02
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Resumo
The objective of this work was to determine the productive potential and the genotype by
environment interaction of 550 accessions of the Embrapa’s Rice Core Collection. The performance, and yield
adaptability and stability of each genotype was evaluated using the additive main effects and multiplicative
interactions (AMMI) approach, in nine field experiments, carried out in six Brazilian states, under dry and
irrigated conditions, during three years. The linear mixed model analysis was performed, and the estimates of
the variance components were obtained by the residual maximum likelihood (REML), using the best linear
unbiased prediction (BLUP) procedure for the prediction of the genotypic values of random effects (EBLUP)
associated with each accession. The group of accessions with better performance was the one of lines and
cultivars from Brazil (LCB), as expected. However, traditional varieties (VT) were identified among the best
yielding genotypes, which shows the potential of this germplasm group to contribute as a new source of genetic
variability to breeding programs. Superior accessions were identified for their stability, adaptability and grain
yield, among which CA880078, CA840182 and CNA00091stand out.
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Oryza sativa, AMMI, Caracterização agronômica, Modelo linear misto, Recursos genéticos, Variedades tradicionais
Citação
BUENO, Luíce Gomes et al. Adaptabilidade e estabilidade de acessos de uma coleção nuclear de arroz. Pesquisa Agropecuária Brasileira, Brasília, v. 47, n. 2, p. 216-226, fev. 2012.