Vol. 11, Issue 4 (2022)

Author(s):
Guman Singh, Dhirendra Singh, Naresh Parashar, DK Gothwal and RK Solanki

Abstract:
High temperature is a major abiotic stress factor limiting wheat (Triticum aestivum L. em. Thell) productivity. Improvement of heat tolerance in wheat is an important breeding objective. This experiment was conducted using 10 genetically diverse genotypes of wheat were evaluated for heat stress tolerance in two varying environments created by two different dates of sowing viz., normal (E₁) and late (high temperature stress, E₂) for yield and its contributing characters. It could be visualized from heat susceptibility index that parent Raj 3077, Raj 4079 and Raj 3765 were identified as good donors for heat tolerance. Among the crosses, Raj 3765xRaj 3077, Raj 3765xRaj 3777, Raj 3765xRaj 4079, Raj 3077xRaj 4079, Raj 3777xRaj MR-1, Raj 3777xRaj 4120, Raj MR-1xRaj 4120, Raj MR-1xWH 1105, Raj 4079xRaj 4120 and Raj 4079xWH 1105 were most desirable and could be utilized as a promising breeding material for the development of new set of heat stress tolerant wheat varieties.