Yield stability and adaptability of maize hybrids based on GGE biplot analysis characteristics

• Main Authors: Marcio Balestre, João Cândido de Souza, Renzo Garcia Von Pinho, Rogério Lunezzo de Oliveira, José Mauro Valente Paes
• Format: Article
• Language: English
• Published: Brazilian Society of Plant Breeding 2009-01-01
• Series: Crop Breeding and Applied Biotechnology
• Subjects: Intervarietal hybrids; AMMI; mega-environments.
• Online Access: http://www.sbmp.org.br/cbab/siscbab/uploads/c8eb9791-1c9f-e792.pdf
• ISSN: 1518-7853; 1984-7033

The objective of this study was to evaluate stability and adaptability of the grain yield of commercial intervarietalmaize hybrids by the GGE (Genotype and Genotype by Environment Interaction) biplot and AMMI (Additive Main Effects andMultiplicative Interaction) analyses. Two intervarietal hybrids (BIO 2 and BIO4) were evaluated together with single, doubleand three-way cross hybrids. The performance of the intervarietal hybrid BIO 4 was superior to all double and three-waycross hybrids and outmatched the single-cross hybrids by 43%. In terms of stability, BIO 2 was more stable than BIO4, whichis desirable, but biological stability, which is not necessarily desirable, was also observed, since the yield was below theenvironmental mean. The graphical GGE biplot analysis was superior to the AMMI1 since a greater portion of the sum ofsquares of GE and G+GE was captured and the predictive accuracy was higher. On the other hand, the AMMI2 graphoutperformed the GGE biplot in predictive accuracy and explanation of G + GE and GE, although the difference in accuracywas smaller than between GGE2 and AMMI1.