PRECISE PHENOTYPING APPROACH OR CHARACTERIZATION OF TERMINAL HEAT TOLERANCE IN BREAD WHEAT (TRITICUM AESTIVUM L.)

The investigation of study of terminal heat tolerance carried out at experimental field of Krishi Vigyan Kendra, Banasthali Vidyapith, Rajasthan during crop season 2020-2021. The experiments were established in a precise phenotyping approach with 3 replications. Germination rate, days to heading (DTH), plant vigor, canopy temperature data was collected. A vital quality to improve establishment is plant vigour, water- use efficiency and grain yield for wheat. Dates of heading were determined when 50% of the plant in a field had reached under TS and LS conditions. The traits days to heading should be invariably considered for wheat improvement. The plant vigour and germination rate data have been reported. The average value of germination rate of the genotypes under timely and late sown were 59.51 and 65.91 respectively. When compared to timely sowing, the genotypes germination rates for late sowing were higher. The effects of temperature were more on LS as compared to TS. The ten genotypes examined showed fairly diverse variability for the various traits evaluated and were significantly associated with yields that could be used in breeding programs in wheat breeding.