Performance of Yield and Other Agronomic Characters of Four Wheat (Triticum
aestivum L.) Genotypes under Natural Heat Stress
Four wheat genotypes viz., CT-0231, CT-99187, Bakhtawar-92 and Saleem-2000 were planted at NIFA experimental field on four different planting dates in order to test their performance against heat stress. The influence of heat stress was studied on yield and some other agronomic characters viz., days to 50% emergence, days to 50% heading, days to 50% maturity, plant height (cm), Biological yield (kg ha-1) grain yield (g/plot), grain yield (kg ha-1), harvest index (%) and lodging percentage. A gradual decrease in all the parameters was observed as a result of the late planting dates except for number of days taken to 50% emergence which was increased for all the genotypes in correlation with late planting. However, increase in grain yield (g/plot), grain yield (kg ha-1) and harvest index was observed for all the four genotypes at planting date 2. Which was considered to be the optimum sowing date for the genotypes under consideration.
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