Method for identifying cold resistance difference between wheat varieties

The invention discloses a method for identifying cold resistance difference between wheat varieties. The method comprises the following steps: (1) determining physiological and biochemical indexes related to cold resistance of different varieties of wheat subjected to sufficient cold resistance exercise; (2) performing comprehensive cold resistance evaluation on the physiological and biochemical indexes obtained in the step (1) by using a membership function method to obtain a cold resistance membership function value (Uij) of the sample; and (3) taking the average value of the relative conductivity of each sample and the membership degree of the physiological and biochemical indexes as the comprehensive evaluation standard of the cold resistance of each sample, and carrying out comparing.The method has the beneficial effects that a multi-index comprehensive evaluation function is established, and compared with an existing method for evaluating the cold resistance of the kiwi fruits by using a single index or