Effect of Temperature on Performance of Wheat Varieties under Semi-arid Conditions of Uttar Pradesh

A field experiment was conducted during rabi seasons of 2005–06 and 2006–07 with two varieties of wheat (PBW 343 and HUW 234), and seven dates of sowing at kalai(Aligarh), research station of C.S. Azad university of Agriculture and technology, Kanpur. Sowing dates were kept different in order to allow the crops to be exposed to different temperature conditions. Planting time influenced the maturity. Higher grain yield of wheat variety PBW 343 was recorded with planting in second week of November. Similarily variety HUW 234 yielded higher when planted in fourth week of November. The results indicated that wheat yield reduced with increase in daily mean post-anthesis temperature.