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 |
High temperature is a major environmental stress factor limiting wheat (Triticum aestivum L.) productivity. Improvement of heat tolerance in wheat is an important breeding objective. The present investigation was carried out to evaluate and identify terminal heat tolerant bread wheat genotypes on the basis heat susceptibility index. This experiment was conducted using 20 genotypes in split plot design with three replications under three dates of sowing i.e. 24th December, 4th January and 14th January. Various traits like days to 50 percent flowering, days to maturity, plant height (cm), earhead length (cm), spikelets spike-1(No), grains spike-1(No), grain yield per plant(g), grain yield per plot(g), leaf rolling(%), canopy temperature depression (CTD) (â°C) and 1000 grain weight(g) were studied and used for the calculation of heat susceptibility index (HSI). Among all genotypes, NIAW 3583, NIAW 3578, NIAW 3895, NIAW 3991 and Netravati had minimum values of HSI for different traits, representing high temperature tolerance of these genotypes. On the other hand wheat genotypes which are heat susceptible on basis of HSI viz., NIAW 3170, NIAW 4013, NIAW 3927 and NIAW 4033 had high HSI value with optimum mean yield.
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