Genotype × environment interaction and stability analysis of CMS- Based wheat hybrids under terminal heat stress

The current study aimed to ascertain the performance of hybrid wheat under different environmental conditions. Sixteen newly developed CMS-based hybrids were used as the experimental material. Stability for grain yield performance and genotype × environment (G × E) interaction was studied in 16 hybrids made by using line × tester design of hybrid wheat by evaluating them across three temperature regimes viz., 20th November, 30th November and 10th December following randomized block design with twice replications during rabi 2018-19 at Seed Breeding Farm, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (M.P.). Genotype × environment interaction was analyzed using Eberhart and Russell's additive main effect and multiplicative interaction (AMMI) model, as well as the genotype and genotype × environment interaction (GGE) stability model analysis. There was considerable variation in grain yield among both genotypes and environments. The AMMI and GGE biplots explained 83.31 % and 94.7 % of the observed genotypic variation for grain yield, respectively. The hybrid G15 (CMS94 × Res-37) was the most stable across the environments in terms of grain yield. They can be considered potential genotypes for cultivation under terminal heat stress after evaluation in multilocation trials. Hence, the hybrids mentioned above could be used to accelerate wheat improvement programs for different cropping systems.