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An Assessment of Stability Analysis for Grain Yield in New Maize Hybrids

In order to study the genotype environment interaction for grain yield in new maize hybrids. 12 single crosses wereevaluated based on a randomized complete block design with four replications (in 24 environments including 12 stations) within 2 years. Simple and combined analyses of variances showed that there were significant differences among genotypes. Significance of Bartlet test indicated the requisiteness ofenvironment (with the highest coefficient ofvariation] elimination in all analyses. In order to evaluate Interaction and determine the adaptation of genotypes, eight different parametric stability analysis methods were employed in the study, including: Roemer environmental variance. Environmental coefficient of variation of Francis and Kanenberg , Finlay and Wilkinsonʹs regression method, Eberhart and Russellʹs deviation of regression coefficient, Penthus coefficient of determination, stability variance of Shukla, Wrick ecovalanee and finally Muir method based on partitioning of GxE interaction sum of squares into change in order and in value. Rased on Muir method it was indicated that 96/65% of interaction snm of squares were composed of change ill rook. Based all SSlC which represents the twofIrst types of Line and Binns stability concepts Sc 76 was the most stable and high yielding genotype andthis method was the most efficient oneamong theunivariate parametric methods.