Additive main effects and multiplicative interactions analysis of yield performances in bread wheat genotypes across environments

摘要

This study was carried out in 2000-2001 to determine the yield performance of 20 bread wheat genotypes across six environments in Central Anatolia, Turkey. The experimental layout was a randomized complete block design with four replications. Additive main effects and multiplicative interaction analysis (AMMI) indicated that the yield performance of genotypes were under the major environmental effects of genotype-environment interactions. The first two principal component axes (PCA 1 and 2) were significant (p < 0.01), which cumulatively contributed to 78.64% of the total genotype-environment interaction. A biplot generated using genotypic and environmental scores of the first two AMMI components also showed that genotypes with larger PCA 1 and lower PCA 2 scores gave high yields (stable genotypes) while genotypes with lower PCA 1 and larger PCA 2 scores had low yields (unstable genotypes).