Vol. 12, Issue 10 (2023)

Author(s):
Giradhari Lal Yadav, DK Gothwal and Deepak Gupta

Abstract:
The current research was planned to understand the effect of high temperature on grain yield and its contributing characters in order to select heat tolerant genotypes for future breeding programmes. Thirty six (eight parents and twenty-eight F₁’s) barley genotypes were evaluated under two environments created by different dates of sowing i.e. timely sown and late sown, during rabi 2022-23. In the present study, the heat susceptibility index value of parents and crosses for yield and its contributing characters were calculated and genotypes were classified into four different categories i.e. highly heat tolerant, heat tolerant, moderately heat tolerant and heat susceptible. From the result of heat susceptibility index (HSI), it could be visualized that the parents RD-2660, RD-2052, RD-2715 and RD-2794 were found to be desirable for grain yield and its contributing characters under heat stress environment. Among the crosses namely; RD-2035 x RD-2660, RD-2715 x RD-2899, RD-2035 x RD-2624, RD-2035 x RD-2794, RD-2624 x RD-2907 and RD-2660 x RD-2907 showed the superiority under heat stress environment for more than two characters. These parents and crosses could be utilized as a promising breeding material for the development of new set of heat stress tolerant barley varieties.