白榆是新疆平原地区主要用材林、防护林、及绿化树种之一,也是南北疆绿洲广为栽培的乡土树种。在长期生长栽培中,演化出许多不同特点的种内变异植株。对这些变异及时发现,恰当分析,进行选择繁育,对提高白榆品质,提高造林经济效益都有着重要意义。新疆林业厅林木种子公司,八一农学院林学系、自治区林科所等单位,曾协作进行白榆 Ulmus is one of the major timber forests, shelterbelts and greening species in the plain areas of Xinjiang. It is also a native tree species widely cultivated in northern and southern Xinjiang oasis. In the long-term growth and cultivation, evolved many different characteristics of intraspecific mutation plants. The timely detection of these mutations, proper analysis, selection and breeding, to improve the quality of Ulmus, improve afforestation economic benefits are of great significance. Xinjiang Forestry Department tree seed companies, August 1 Agronomy Department of Forestry, Autonomous Region Forestry Branch and other units, have collaborated elm