Background and Objective: Wheat plants exposed to heat stress due to late sowing often leads to great yield loss. Genotype×Environment interaction (GGE) biplot approach is a powerful tool for graphical multi-environment trials data analysis. The main objective of this investigation was to identify high yielding and stable genotypes of wheat under late sowing date over a range of environmental conditions in Egypt through GGE-biplot analysis. Materials and Methods: We investigated grain yield t haG1 and its attributes of forty-nine CIMMYT’s lines along with three local cultivars of bread wheat at two locations in two sowing dates and over two consecutive years (8 environments). Results: Highly significant variations were obtained for all investigated traits among all sources of
variation. Since the environment was the main source of variation. Maximum reduction percentage due to late sowing date was observed for grain yield t haG1 in both locations and this may be because of high temperature and short grains filling duration. The GGE biplot method revealed that L33, L40 and L44 were the highest yielding genotypes at the Assiut location. Genotypes L8, L9 and L42 were the superior yielding entries at Nubariah location environments. Conclusion: L30, L32, L37, L21, L27 and L33 were the most stable entries as they were subtended by relatively low PC2 scores. The results of GGE and STI indicated that L28 and L33 gave high grain yield with superior stability and could be considered as the most suitable genotype for late sowing.