在辽宁７个县（市）小钻杨天然杂种后代的杨树林分中，溃疡病感病率６０％以上的林分内，采取３株大树法优选出１０株优树，经离体、活体接种，诱发鉴定，自然感病及生长表现的评比测定，选择出辽选抗病５号、辽选抗病１１号两个抗水泡型溃疡病新无性系，接种测定在０～１４８％之间，自然感病率５６％～１９６％，对照北京杨为７５％～１００％，９年生单株材积分别超小美旱、鞍杂杨、彰武小钻杨０～２６％，可在辽宁省北部地区栽植。 In the poplar forest of the offspring of small drill natural hybrids in 7 counties (cities) of Liaoning Province, within the stand of more than 60% of the susceptible rate of the canker disease, 10 trees were selected by tree method, Inoculation, inducing identification, natural susceptibility and growth performance were evaluated. Two new clones of anti-blister-type ulcer disease, Liao Xuan Kang 5 and Liaoxiao 11, were selected. The inoculation was determined at 0-14.8% Between the natural susceptible rate of 5.6% ~ 19.6%, compared with Beijing Yang 75% to 100%, 9-year-old single plant volume were ultra-small drought, %, Can be planted in northern Liaoning Province.