Genotype× Environment Interaction for Grain Yield of Maize Hybrids Using the GGE Biplot

In Present research 14 maize hybrids were studied in form of randomized compelet block design with 4 replicates across 6 environments including 3 agriculture research centers (Karaj, Mashhad and Jiroft) in two years (1390-1391).Result of combined variance analysis showed that genotype ×year×location interaction is meaningful in %1 probability level. According to this result for studying interaction effect and determining stable hybrids, the GGE biplot multivariate method was used. Results showed that the first two principal components regression model explained 92% of the observed changes.By using Biplot polygons, six Top genotypes and two mega environments were identified.Also based on, both yield and stability biplot, genotype number 2, were identified as stable genotype with average function. Biplot analysis of correlations between environments a positive correlation between the Jiroft and Karaj and a negative correlation between Mashhad and Karaj environments were existed Evaluation of genotypes relative performance revealed that genotype No. 5 in Karaj and genotypes 14 and 2 in Mashhad and Jiroft, had the highest performance.