National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present investigation was carried out to recognize the impact of high temperature on yield and its attributing traits and to select heat stress tolerant parents and cross combinations for future breeding programme in wheat. To achieve the prerequisite of this objective, an experiment was conducted in two environments under normal and heat stress; it involved eight diverse genotypes as parents and their 28 F1’s. The heat susceptibility indices of parents and crosses for different quantitative characters were determined and genotypes were classified arbitrarily in to four different categories i.e. highly heat tolerant, heat tolerant, moderately heat tolerant and heat susceptible. Based on HSI the parents Raj 3777, Raj 3765 and Raj 4238 were found most desirable for most of the characters under heat stress environment. Among the crosses, Raj 4238 x PBW 550, Raj 4238 x WH 1021, PBW 550 x WH 1021, PBW 343 x Raj 3777, PBW 343 x Raj 4238, PBW 502 x HD 3086, PBW 502 x Raj 4238, PBW 502 x PBW 550, Raj 3777 x Raj 3765, Raj 3777 x Raj 4238, Raj 3777 x WH 1021 and Raj 3765 x WH 1021 were found most suitable as they attained top ranks for more than two yield contributing characters and could be utilized as a promising breeding material for the development of new set of thermal stress tolerant wheat varieties.
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