Among various production factors for wheat crop, time of sowing and wheat varieties are crucial ones influencing productivity. Onset of various phenophases of wheat crop is greatly related with the prevailing temperature at that time. Any deviation from optimum temperature for onset of phenophase may drastically reduce the crop productivity. Similarly wheat varieties play vital role under different temperature situation. | Response of wheat varieties Triticum aestivum L. and Triticum durum Desf. to sowing time