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 estimate relative heterosis and heterobeltiosis in wheat genotypes to identify desirable cross combinations under high temperature stress for days to heading, grain filling duration, days to maturity, plant height, number of tillers per plant, flag leaf area, number of grains per spike, peduncle length, spike length, 1000-grain weight, biological yield per plant, grain yield per plant and harvest index. The F1 crosses were made in half diallel fashion using 10 genotypes. The experiment was conducted in randomized block design with three replications during rabi 2016-17. The results revealed sufficient degree of heterosis and heterobeltiosis for all the characters studied. An overall evaluation of heterosis for grain yield per plant across the environments revealed that the maximum heterosis over mid-parent was observed as 34.22% (Raj 3765xRaj 3777) in high temperature stress environment. Similarly, maximum heterosis over better parent was observed as 33.15% (Raj 3765xRaj 3777) in high temperature stress. Therefore, these crosses were observed more heterotic for grain yield per plant under high temperature environmental conditions. Therefore, it could be concluded that these cross combinations may be exploited in future breeding programme for the development of good heterotic gene pool of wheat for improving grain yield and other contributing traits under heat stress environment.
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