Ammi-Biplot Analysis of Yield Performances of Bread Wheat Cultivars Grown at Different Locations

Abstract

The purpose of the study was to determine the stabil ity and yield performances of 20 bread wheat cultivars grown in nine different environments. The trials were arrange d in a Randomized Complete Block Design with four replications. Additive main effects and multiplicat ive interactions analysis (AMMI-biplot) indicated t hat the yield performances of bread wheat cultivars were highly affected by the major environmental factors. The fir st two principal component axes (PCA 1 and PCA 2) were significant and they explained 60.9 % of the total gen otype x environment interaction. A biplot generated using g enotypic and environmental scores of the first two AMMI components demonstrated that cultivars with larger PCA 1 and lower PCA 2 scores were high yielding and stable cultivars and cultivars with lower PCA 1 and larger PCA 2 scores were low yielding and unstable cultivars in tested locations. It could be concluded that the Basribey 95 had the highest yield performance and also the s table genotype in the test locations. Đzmir 85 and Ziyabey 98 were poorly stable although they showed high yield performances in some of test environments. Momtchill had the lowest yiel d performance in all test locations. It was detecte d that Menemen location could be the most representative among the tested locations to determine the stability of bre ad wheat cultivars to recommend the farmers in the Western Coastal Zones in the Aegean Region under Mediterranean climatical conditions of Turkey.