evaluation of grain yield stability of recombinant inbred lines in bread wheat (triticum aestivum l.) based on ammi method

background and objectives: the development of high yielding cultivars with wide adaptability is the ultimate aim of plant breeders. however, attaining this goal is made more complicated by genotype-environment interactions. the genotype by environment interaction is a major problem in the study of quantitative traits because it complicates the interpretation of genetic experiments and makes predictions difficult, also it reduces grain yield stability in different environments. multi-environment trials are often analyzed to assess the yield stability of genotypes. additive main effects and multiplicative interaction (ammi) model proved to be a powerful tool in diagnosing genotype × environment interaction patterns. the ammi statistical model has been widely used to explain complicate g×e interaction, to enhance selection efficiency and to ensure genetic gain from selection. the objective of this study was to investigate the response of the lines in studied locations and to identify lines adapted to the test environments.materials and methods: order to investigate response of wheat lines to different environmental conditions and determination of yield stability, this study was conducted by 76 recombinant inbred lines derived the cross between roshan× superhead based on randomized complete block design with two replications in five environments. the trials were performed at five locations in kerman, jopar, mahan, yazd and ardakan. in order to evaluate the interaction and determine the stable lines, the stability analysis was done using ammi methods. the data were subjected to statistical analysis using sas and excel software. results: the results of the combined analysis of variance revealed significant differences of grain yield among lines, environment and also line× environment interaction (p