Abstract :
: In order to evaluate the grain yield stability of wheat-barley disomic addition lines and locate the QTLs controlling static and dynamic phenotypic stability in barley, 7 disomic adition lines (DALs) of barley (Hordeum vulgare L., 2n = 2x = 14, cv. Betzes) in the genetic background of bread wheat (Triticum aestivum L., 2n = 6x = 42, cv. Chinese spring = CS) along with thier parents were sudied in five environments using a randomized complete block design (RCBD) with three replications during 2007-2009. Combined analysis of variance indicated significant genotype-by-environment interactions for grain yield. Multivariate and univariate stability parameters such as: additive main effect and multiplicative interactions (AMMI), regression coefficients (bi), deviations from regression (S2di), environmental variance (S2xi), superiority index (Pi), Wricke’s ecovalence (W2i), coefficient of variation (CVi), geometric adaptability index (GAI), AMMI stability value (ASV), yield stability index (YSI) and a simple graphical method indicated that most of the QTLs controlling adaptation in barley are located on chromosomes 2H, 4H, 5H and 6H. The genes controlling dynamic stability are located on the chromosome 3H, while the genes controlling static stability are located on the chromosomes 2H, 4H and 5H. Therfore, it can be concluded that the QTLs controlling yield stability in barley are dispersed in the whole genome of barley.
