Commonly, relative performance of different genotypes varies in different environments(GEI). This means there exists genotype by environment interactions. This is a major challenge to breeders to fully understand and obtain genetic control of variability. Hence, measuring and understanding GEI should be an essential component of variety evaluation. In Ethiopia there are only few studies regarding GEI and stability of linseed varieties. But further investigation regarding GEI is crucial to accumulate more scientific evidence for any anticipated changes like climate irregularities. Besides identifying yield components that have positive association with yield under different environmental conditions is important since this might provide better bases of progeny evaluation. Therefore, this work contains relevant information on the patterns of GEI for yield and yield related traits and methods to identify widely and specifically adaptable varieties of linseed. It also has information on the association among yield and yield related traits of linseed. The recommendations of the work can also be taken as reference for further breeding strategies of linseed and other related crops.