本世纪四十年代欧州已有人研究榆树育种,六十年代美国获得了抗荷兰病的榆树杂种,七十年代初期,我国北方各省区也开始重视榆树的良种选育工作。我国榆属植物资源丰富,不仅种类多、分布广,而且许多榆树的材质好。特别是榆树(即白榆Ulmus.Pumila.L)适应性强,是我国北方深受群众欢迎的主要造林树种之一,国内外对于基因资源的保护、收集和利用当作树木育种中最重要的一项战略措施来抓。 In the forties of the last century European countries have studied elm breeding. In the 1960s, the United States obtained elm hybrids that are resistant to the Dutch disease. In the early 1970s, the provinces and autonomous regions of northern China began to pay attention to elm breeding. China is rich in Ulmus resources, not only many species, widely distributed, and many elm material is good. Especially Elm (Ulmus.Pumila.L) is one of the main afforestation species popular in the north of our country. The protection, collection and utilization of genetic resources both at home and abroad are the most important for tree breeding A strategic measure to grasp.