Comparing Biplot Multivariate Analyses with Eberhart and Russell’ method for genotype x environment interaction

Abstract

The aim of this study was to compare the multivariate methods GGE (Genotype main effects and Genotype xEnvironment interaction) and AMMI (Additive Main effects and Multiplicative Interaction) with the method of Eberhart andRussell for interpreting genotype x environment interaction. The AMMI and GGE analysis explained around 50% of the sumof squares of the genotype x environment interaction, whereas the method of Eberhart and Russell explained only 9.1 and15.8% each year. The cultivars classified as minor contribution to the genotype x environment interaction by methods ofAMMI and GGE were also the same classification method of Eberhart and Russell. The AMMI and the GGE biplot analysesare more efficient than the Eberhart and Russell. The GGE biplot explains a higher proportion of the sum of squares of theGxE interaction and is more informative with regards to environments and cultivar performance than the AMMI analysis.

Keywords

• Genotype x environment interaction
• breeding
• GGE
• Zea mays.