Wheat hybrid Heng 9966, Liangxing 99 and Liangxing 66(parents of Heng 9966) and their relatives Jimai 22 were used as materials and salt stress concentrations of 0(control), 0.3%, 0.5%, and 1.0% NaCl were used to treat seedlings. After 15 days of treatment of wheat under salt stress, physiological indices were measured and compared. The experiment results showed that, with the increase of salt concentration, 4 wheat varieties showed a gradual decrease in fresh weight. The content of chlorophyll increased at...