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为了给品种区化和资源的育种利用提供理论依据，于1995~1996年在辽宁熊岳作者用外渗电导法、褐变观察法和恢复生长法测定了属于中国李、欧洲李、杏李、加拿大李、美洲李、乌苏里李、樱桃李和李、杏杂种的36个代表品种和类型的抗寒性。结果表明：（1）李的抗寒性表现出丰富的多样性，且多数李品种对低温的适应能力较强；(2)起源地的生态条件与品种的抗寒性密切相关;（3）李几个主要种的抗寒性顺序为：乌苏里李＞美洲李＞加拿大李＞杏李＞樱桃李＞欧洲李＞中国李；(4)在中国李中，绥李三号抗寒性最强，是优良的抗寒育种亲本之一。
In order to provide a theoretical basis for variety zoning and breeding of resources, authors from Xiong Yue, Liaoning Province, using extravasation conductivity method, browning observation method and recovery growth method, from 1995 to 1996, Cold tolerance of 36 representative varieties and types of Canadian plum, American plum, Wusuli plum, cherry plum and plum, apricot hybrids. The results showed that: (1) the cold resistance of Li showed a rich diversity, and most of the Li varieties had strong adaptability to low temperature; (2) the ecological conditions of origin were closely related to the cold resistance of varieties; (3) The order of cold resistance of several major species of Li is: Wusuli> Plum> Canada> Lee> Apricot> Cherry> European> Chinese Li; (4) Strongest, is one of the good cold-resistant breeding parents.