Parametric stability analysis of cold tolerant rice genotypes for grain yield

Assessment of genotype × environment interaction is an important and challenging issue for the evaluation of promising genotypes with high adaptability and stability in large multi-environment trials. Both the effect of genotype × environment interaction and the selection of genotypes play a crucial role in improving the yield and stability of performance of the genotypes in a more precise and refined manner. To investigate GEI and identify the best-performing stable genotypes, a study comprising of 38 cold-tolerant rice genotypes was conducted in four seasons to determine their grain yield stability and adaptability, by employing various stability models that explained the adaptability of genotypes differently, irrespective of the yield performance. From the current study, among all the rice genotypes, CHENAB and VIVEK DHAN-85 were stable for two or more stability parameters, while VIVEK
DHAN-82 had a greater general mean and was characterized as adaptable to favorable environments. On the other hand, HIMALAYA-2216, K-429, and CHINA-1039 were found to be unstable from all the stability models. Genotypes HPR-2513, CHINA-1007, and SHALIMAR-1 were found to be having wider adaptability which could serve as potential parents for future selection programs in different environmental conditions.