以抗寒性不同的4个冬小麦品种为材料,对其在越冬期间叶鞘内丙二醛、可溶性蛋白和脯氨酸生理指标的含量进行测定,以分析高寒地区冬小麦抗寒性的遗传改良潜力。越冬期间,抗寒性强的品种(系)的丙二醛含量较低,可溶性蛋白含量较高;在低温驯化期抗寒性强的品种脯氨酸含量迅速增加,在越冬期各品种脯氨酸含量均保持较高水平。 Four winter wheat cultivars with different cold resistance were used as materials to determine the physiological indexes of malondialdehyde, soluble protein and proline in the leaf sheath during winter, and to analyze the genetic improvement potential of winter wheat cold resistance in the alpine region. During winter, cold-tolerant varieties (lines) had lower MDA content and higher soluble protein content. During cold acclimation period, the proline content of cold-resistant varieties increased rapidly. During the winter, Acid content remained at a high level.