Biplot AMMI graphic representation of specific combining ability
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Data
2002
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Resumo
Specific combining ability (SCA) is a genetic property of great interest in breeding programs aiming at
hybrid cultivars. It enables assessment of the genotype combinations most promising for hybridization. This
study presents the foundations of biplot graphic display associated with AMMI (additive main effects and
multiplicative interaction) analysis, and their application to genetic studies of this kind. The analysis allows the
partition of the sum of squares of the elements of a diallel table (matrix), the SCA sum of squares, to capture a
systematic portion and discard an additional noise to the experimental error. The systematic part or pattern is
represented graphically by the biplot. The parental combinations with greatest potential for hybrid production
may be identified in this graph, and the SCA divergence among the parents can also be assessed. A numerical
example is presented with SAS (Statistical Analysis System) statements for its implementation.
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Palavras-chave
Singular decomposition, Hybrid, Eigen analyses, Principal component, Diallel, Cross
Citação
DUARTE, João Batista; PINTO, Rogério de Melo Costa. Biplot AMMI graphic representation of specific combining ability. Crop Breeding and Applied Biotechnology, Viçosa, v. 2, n. 2, p. 161-169, 2002.