Resilience to Terminal Drought, Heat, and Their Combination Stress in Wheat Genotypes

Heat and drought stresses have negative impacts on wheat yield growth worldwide, causing up to 60% 40% losses, respectively, but their combined effect can cause severe losses. The present study aimed identify the high-yielding genetic resources tolerant and/or heat under climate change scenarios. field trials 42 genotypes were conducted at three locations in four environments (normal TSIR-NS, TSRF-DR, LSIR-HT, LSRF-DHT) each for two consecutive years. Yield contributing traits recorded all experiments locations: SI (susceptibility index) STI (stress tolerance also estimated. GY (Grain yield) was severely affected by LSRF-DHT (48.6%), followed TSRF-DR (23.6%) LSIR-HT (16.8%). had a positive correlation with BM (biomass), HI (harvest index), TGW (1000-grain weight) DH (days heading) (LSIR-HT LSRF-DHT). Stepwise regression analysis revealed higher contribution of towards environments. GW (grain weight/spike) contributed LSRF-DHT, GN number/spike) TSIR-NS TSRF-DR. GFD (grain-filling duration), TGW, PTL (productive tillers) conditions except LSRF-DHT. WS 2016-4 only genotype that yielded high conditions. 2016-12 CNM 16-1 yielding. HINDI 62, HTW 11, QBP 1606 less sensitive low Overall, out 30 (10 category), 19 adapted escape mechanism which is irrespective yielding level. demonstrated potential identified breeding resilience imparting these genotypes.