Genetic studies of parents and F1 on terminal heat tolerance in wheat (Triticum aestivum L.) under late sown irrigated condition using Line X Tester design

The present investigation entitled “Genetic studies of parents and F1 on terminal heat tolerance in wheat (Triticum aestivum L.) under late sown irrigated condition using Line X Tester design” was carried out during rabi 2017-18 and 2018-19 at the All India Co-ordinated Wheat and Barley Improvement Project, B.T.C. College of Agriculture and Research Station (IGKV), Bilaspur (C.G.). The experiment was conducted in RBD involving six lines, three testers and 18 F1s hybrids of wheat with two replications for study of character associated with yield and yield contributing traits. Among the lines, CG 1015 (Chhattisgarh Gehu)-04 was found good in mean performance for days to 50% flowering, number of seed per spike, spike weight, canopy temperature depreciation and biological yield per plant and Raj 4238 was found good for the character of spike length, number of tillers per plant, number of spikelet per spike, 1000 seed weight and biological yield per plant. Among the testers, Halna was good in mean performance for the character of days to maturity, canopy temperature depreciation, and chlorophyll reflection index, Among the crosses, CG 1015 (Chhattisgarh Gehu-04) X HUW 661 was good in mean hybrid performance for days to50% flowering, canopy temperature depreciation and chlorophyll refection index. Raj 4238 X PHSL 10 was good in mean hybrid performance for plant height, number of tillers per plant and canopy temperature depreciation. HD 2285 X HUW 661 was good in mean hybrid performance for spike weight and yield per plant and crosses HD 2932 X Halna was good in mean hybrid performance for the character of 1000 seed weight.