RATE AND DURATION OF GRAIN FILLING IN WHEAT

Abstract

Genotypes did not differ in the rate of grain filling. The rate of grain filling in early sowing was the lowest (0.62 mg/grain/day) which progressively increased in timely and late sowing. Wheat varieties differed widely in the duration of grain filling. The average duration of grain filling in early sowing was 65.3 days which progressively declined to 56 and 38.3 days in timely and late sowing, respectively. The highest rate of grain filling irrespective of the time of sowing occurred in the second fortnight of March.