杨树是辽宁省主要造林树种之一,每年都有大面积栽植。但是,近年来杨树水泡型溃疡病(Dothiorella gregaria Sacc)蔓延很快,危害严重,给林业生产造成很大损失。国内外经验证明,选育抗病品种是解决病害危害的根本措施。美国60年代从美洲黑杨(Populus deltoides)不同种源中,有成效地选择出抗锈病的优良品种;意大利也从美洲黑杨中选择出,不同程度的抗栅锈病的哈佛杨、鲁克斯杨等。辽宁省杨树资源丰富,基因广泛,为杨树抗 Poplar is one of the main afforestation species in Liaoning Province, with large-scale planting every year. However, Dothiorella gregaria Sacc has spread rapidly and seriously in recent years, causing great losses to forestry production. Domestic and foreign experience has proved that selecting and breeding disease-resistant varieties is the fundamental measure to solve the disease damage. The United States in the 60s from Populus deltoides different provenances, the effective selection of rust-resistant varieties of good; Italy also selected from Populus tomentosa, varying degrees of resistance to rust rust Harvard Laws, Yang and so on. Liaoning Province is rich in poplar resources, gene extensive, as poplar resistance