بررسی ارتباط آمارههای پایداری و عملکرد گندم نان در شرایط نرمال و تنش خشکی

In order to evaluate the rank correlation among yield performance and stability statistics, eight genotypes of bread wheat were tested in eight randomized complete block design with three replications in four years under normal and drought stress conditions. Nine stability statistics including environmental variance, coefficient of variation, Wricke's ecovalence, Shukla's stability variance, regression slope, deviation from regression slope and AMMI stability value(ASV) were calculated. Based on Kendall's rank correlation, the highest correlation was observed among Wrick's ecovalence, Shukla's stability variance and deviation from regression slope. Among univariate statistics, regression slope showed the highest correlation with the ASV. Except for environmental variance, other indices didn't show significantly correlation with yield performance. Thus, grain yield and stability indices should be considered simultaneusly in breeding programs.