اهمیت مراحل گلدهی و پر شدن دانه در افزایش عملکرد گندم

To evaluate the phenology of a wide range of wheat genotypes in Iran and its relation with increase of wheat yield, 36 wheat genotypes were studied at Research Farm of the College of Agriculture, University of Tehran (Karaj) during 2010-11 growing season. Experimental design was simple lattice with three replications. In this experiment, the growth degree day of different stages of development, including emergence, flowering and maturity were recorded. At maturity, grain yield, biological yield and harvest index were measured. The results showed that the cultivars with early flowering had the highest grain yield and harvest index. Also, late flowering reduced grain filling period.