Effect of drought simulation on grain weight, protein and lysine content of bread wheat (Triticum aestivum L.)

Effect of drought simulation (terminal, preanthesis, postanthesis and full irrigation) on grain weight, protein and lysine content in different strains of bread wheat viz., Chakwal, Pavon, AZS-4 and AZS-17 was studied under field conditions. Water stress especially terminal and postanthesis decreased (P less than or equal to 0.05) grain weight, whereas protein and lysine content significantly (P less than or equal to 0.05) increased. Correlation between grain weight and protein content was negative and highly significant (r = -0.672, n = 16). Reduction in endosperm due to water deficit could be the probable cause for lower grain weight and enhanced protein content.