Journal
CROP BREEDING AND APPLIED BIOTECHNOLOGY
Volume 9, Issue 3, Pages 219-228Publisher
BRAZILIAN SOC PLANT BREEDING
DOI: 10.12702/1984-7033.v09n03a03
Keywords
Intervarietal hybrids; AMMI; mega-environments
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Funding
- Empresa de Pesquisa Agropecudria de Minas Gerais (EPAMIG)
- Brazilian Federal Agency
- Evaluation of Graduate Education (CAPES)
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The objective of this study was to evaluate stability and adaptability of the grain yield of commercial intervarietal maize hybrids by the GGE (Genotype and Genotype by Environment Interaction) biplot and AMMI (Additive Main Effects and Multiplicative Interaction) analyses. Two intervarietal hybrids (BIO 2 and BIO4) were evaluated together with single, double and three-way cross hybrids. The performance of the intervarietal hybrid BIO 4 was superior to all double and three-way cross hybrids and outmatched the single-cross hybrids by 43%. In terms of stability, BIO 2 was more stable that? BIO4, which is desirable, but biological stability, which is not necessarily desirable, was also observed, since the yield was below the environmental mean. The graphical GGE biplot analysis was superior to the AMMI1 since a greater portion of the sum of squares of GE and G+GE was captured and the predictive accuracy was higher On the other hand, the AMMI2 graph outperformed the GGE biplot in predictive accuracy and explanation of G + GE and GE, although the difference in accuracy was smaller than between GGE2 and AMMI1
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