Abstract: Genotype - environmental (GXE) interaction and adaptability of 12 irrigated rice genotypes for growth duration and yield were analyzed through regression and deviation from regression analysis. All the genotypes were found instable for growth duration. BR4839-17-5-2-2-HR5 and NJ70507 showed insignificant bi and S2di and their mean yield greater than grand mean. In stability parameters, these two genotypes considered to be the most stable and wider adaptable. BR5877-21-2-3, QINGLIALINO 1, ZHENGUI AI 1 and BRRI dhan28 showed significant S2di indicating their instability but their higher mean yield over grand mean suggesting their suitability for poor environments.