中文摘要：

生气繁殖策略为获得新、优异的遗传型是很有效的。在节 Leuce Duby 以内从 12 杂交组合生产的 98 新白白杨混血儿克隆用基因分析和幼苗测试被学习。我们利用了在这张人口存在的宽变化并且发现在在胸高度(DBH ) 的直径之中的差别，根颈直径(RCD ) 和高度(H) 是统计上极其重要。这些测量特点的克隆的重覆性从 0.947 0.967，它显示这些特点被遗传因子强烈控制。基于多重比较， 25 克隆的一个总数比控制栽培变种在生长显示出更好的性能。这 25 克隆从六个不同杂交组合，它能为新克隆提升投射的未来保证一个更大的遗传背景。这研究在这些克隆和罐头上提供简单概述指导我们执行随后的选择计划。

英文摘要：

Cross breeding strategies are very efficient for gaining new and superior genotypes. Ninety-eight new white poplar hybrid clones produced from 12 cross combinations within the Section Leuce Duby were studied using genetic analysis and seedling tests. We exploited the wide variation that exists in this population and found that the differences among diameter at breast height （DBH）, root collar diameter （RCD） and height （H） were statistically extremely significant. The repeatability of clones of these measured traits ranged from 0.947-0.967, which indicated that these traits were strongly controlled by genetic factors. Based on multiple compari- sons, a total of 25 clones showed better performance in growth than the control cultivar. These 25 clones were from six different cross combinations, which can guarantee a larger genetic background for future new clone promotion projects. This study provides a simple overview on these clones and can guide us to carry out subsequent selection plans.