Analysis on the Grain Filling Characters of Winter Wheat under Dry Stress

Under the dry stress,the grain filling processes of six main winter wheat varieties planted in the west of Henan province were modeled with Logistic equation and conducted a series of inferior parameters.The relationship between grain filling parameters and grain weights was analysed using correlation and stepwise regression.Results showed that grain filling rate significantly affected grain weight,but grain filling duration didn't relate to the grain weight significantly. It was very important to increase grain weight by increasing grain weight filling rate in gradual increasing period and quick increasing period.