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EFFECT OF CONTEMPORARY ROTATION SIMULATION ON THE GRAIN WEIGHT, PROTEIN AND LYSINE CONTENT OF BREAD WHEAT (TRITICUM AESTIVUM L.)

MAQBOOL AHMAD, M.A. ARAIN AND K.A. SIDDIQUI

Abstract: Effect of contemporary rotation simulation on grain weight, protein and lysine content of four commercial cuhivars (Pavon, Sarsabz, Mehran 89 and T.J. 83). and 21 new promising strains of bread wheat was studied Late sowing decreased (P < 0.05) grain weight, but protein and lysine contents were significantly (P < 0.05) enhanced. Correlation between grain weight and development period of grain was positive (r=0.581), whereas, development period and protein (r = -0.463) and protein and grain weight (r = -0.263)was' negative. Higher temperature in the post-anthesis period oflate sown wheats probably shortened the pin filling period, which resulted in the reduced endosperm. The reduction in endosperm due to late sowing my be responsible for lower grain weight and enhanced protein content.

Atomic Energy Agricultural Research Centre, Tandojam, Sindh, Pakistan.