Identification of the genetic architecture of phenotypic stability and management of adaptational genes is a prerequisite for improvement of adaptation. To locate the genes controlling adaptation, disomic addition lines of Barley into the genetic background of Chinese Spring were used in a randomized complete block design with three replications under two different conditions (rainfed and irrigated) for three years. Combined analysis of variance showed significant differences for genotypes (G) and GE interaction indicating variability between genotypes and their effects in the GE interaction and possible chromosomal localization of the genes controlling yield and yield stability in Barley. Nonparametric statistical procedures and rank method indicated that most of the quantitative trait loci (QTLs) involved in controlling phenotypic stability and yield in Barley are located on the chromosomes 3H and 4H. Screening nonparametric estimates using biplot technique classified the stability measures in 3 groups. Group 1 (G1) included NPi (1). The PCs axes separated Si(1) , Si(2), Si (3), Si (6), NPi (2), NPi (4) and YSi (2) in group 2 (G2), YSi (1), NPi (3) , RS and GSI were classified as Group 3 (G3).
