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本研究以引进的２０个黑杨新无性系为试验材料，考察了生长及主要形质性状的遗传变异状况。根据６年生林木表现，运用生长和形质性状综合指数选择法，结合造林成活率、适应性和抗病虫能力，选出了８０－Ⅰ－１１、Ｗ－４６、８０－Ⅰ－６、Ⅰ－９２５等４个优良无性系，确认为聊城地区新无性系良种。
In this study, 20 Populus tomentosa clones introduced were used as experimental materials to investigate the genetic variation of growth and major quality traits. According to the 6-year-old forest performance, 80-I-11, W-46 and 80-I-6 were selected according to the growth index, -925 and other 4 excellent clones, confirmed as Liaocheng new clones.