Five rice promising genotypes, Danesh, Jahesh, Milad, Partov, Jelodar, and seven rice genotypes parents, Sangtarom, Tarommahali, Dilamani, Noksiah, Sepidrod, R9, Fajr were investigated for grain yield stability of 2010-11 over tree locations in North of Iran. The results obtained showed highly significant yield differences among rice genotypes, environment and genotype by environment interaction. Some rice genotypes were adjudged stable when different yield stability parameters were considered. DANESH showed adaptation to favorable environments while PARTOV demonstrated insensitivity to environmental conditions, hence it was considered adapted to lowyielding environments. A combination of high grain yield potential, stability parameter of regression coefficient of unity and minimum deviation mean squares from regression identified JELODAR as a rice genotype that deserved to be promoted on-farm and for possible release as commercial varieties for the rice growing ecologies in North of Iran.
