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Exploring genetic bases of heat stress tolerance and quality traits in wheat and their interplay

Mehvish Makhdoom, Iqra Ghafoor, Amna Kanwal, Sadia Ajmal, Muhammad Zulkifal, Ghulam Mehboob Subhani, Javed Ahmad, Makhdoom Hussain

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Int. J. Biosci.14(5), 235-245, May 2019

DOI: http://dx.doi.org/10.12692/ijb/14.5.235-245


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Wheat isprimaryfood grain produced in Pakistan. Fluctuation in environmental conditions among and within growing season is serious constraints influencing qualitative and quantitative wheat yield. Wheat is sensitie to heat stress. Terminal heat stress is one of the major causes of truncated productivity in the late sown conditions in Pakistan. The study was aimed for finding important traits and best genotypes in relation to heat stress. Thirty genotypes were sown at two different sowing dates following RCBD and replicated thrice. Analysis of variance showed significant differences among genotypes for all studied traits. Zeleny and gluten depicted high broad sense heritability coupled with high genetic advance indicating the presence of additive gene effect. Most of the studied traits showed moderate heritability. Biplot analysis showed that G14 and G20 had high 1000-grain weight and harvest index while G24, G25 and G10 present good quality parameters under heat stress.


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