Author(s):

Asmita Kumari, Meera Srivastava and Hanuman Prasad Pandey

Abstract: This experiment was carried out to determine the effects on growth of different heat tolerence genotypes of wheat (Triticum aestivum L.) under timely and late sown condition. The experiment was conducted at Nawabganj Research Farm of Chandra Shekhar Azad University of Agriculture and Technology, Kanpur (U.P.) during Rabi season in year 2017-18, in randomized block design with two replications and twelve treatments. To assess the response of different genotypes on growth observations of wheat crop under timely and late sown conditions. The result shows that germination percentage of all the varieties was almost equal, in the range of 80-85% in both timely and late sown conditions, varieties like WH1218, PBW762 and DBW223 shows maximum productive tillers under timely sown condition. Under late sown condition there is reduction in number of productive tillers in all varieties except DBW150 and RW5 shows little reduction in number of productive tillers, under timely sown condition the number of leaves per plant is more than the late sown condition. Under late sown condition there is reduction in number of leaves per plant but some varieties like WH1218, DBW150 and RW5 shows no reduction, the data was taken after two months of sowing. Heading occurs earlier under late sown condition while it takes comparatively more days to heading under timely sown condition, days to anthesis under timely sown condition is more than the late sown condition DBW222 and K1601 shows maximum days to anthesis Under late sown condition varieties like DBW233, DBW150 and DBW233 shows minimum days to anthesis, under timely sown condition some varieties like K1601, DBW 223, DBW14, DBW222 and WH730 shows maximum days to maturity, under late sown condition some varieties like PBW762, DBW222, K1601 and DBW233 takes maximum days to maturity.

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