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 |
Wheat is self-pollinated annual temperate crop extensively grown as staple food in the world. Thirteen genetically diverse heat tolerance wheat varieties viz.HD3091, DBW90, UP2843, WH1124, HPW211, WH1021, CBW12, MASC6272, JOB666, HD2329, WAXWING, HD2891, HD2961, and three tester HD2967, WH1105, HD3059 was crossed in line x tester mating design excluding reciprocals. A complete set of 57 genotypes comprised of 39 F1s, 13lines and 3 testers along with 2 standard checks (DPW 621-50, UP 2338) were evaluated in the Randomized Block Design (RBD) with three replications during rabi 2014-15. To estimate the level of heat tolerance for different genotypes with respect to morpho-physiological characters like days to 75% heading, days to maturity, plant height, spike length, peduncle length, awn length, flag leaf area, number of tillers per plant, number of spikelets per spike, 1000-grain weight, biological yield, grain yield per plant, harvest index, number of grains/ spike, grain weight/spike along with grain filling duration, canopy temperature depression (CTD), relative Injury (%),chlorophyll content and heat susceptibility index (HSI) were recorded. In the present investigation, High heritability associated with high genetic advance reflected for relative injury percent (0.98, 43.10 & 0.99, 42.96) in both condition, heat susceptibility index (0.93, 0.46) and biological yield per plant (0.89, 12.17) in timely and late sown condition respectively. For all the morpho-physiological traits studied, the estimates of phenotypic coefficient of variation were exhibited higher than their corresponding genotypic coefficient of variation, indicating that the influence of environment on the expression of these characters was observed.
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