摘要
对１０年生毛白杨无性系５个树体性状组的关系分析结果表明，材积、枝下高、圆满度三个重要经济性状的改良潜力较大，通直度的改良效果较差。主干和侧枝两性状组与经济性状组的关系密切，分别解释了经济性状组５４７５％和２８７６％的相关变异。对经济性状实施选择时，可把树高、胸径、Ｈ／２径、冠幅、侧枝的数量与密度、主枝的长与粗以及新枝长和节数作为间接选择指标。
The relationships among five phenotypical characteristic groups of 10-year-old clones of Populus tomentosa Carr.were analyzed.The results showed that its economic traits of volume,height under branch,and taperness can be improved efficiently by selection,but slight gain is obtained for straightness of height.The groups of stem trait and branch trait are closely related with economic trait group,which explained its variation of 54 75% and 28 76% respectively.The traits of height,diameter at breast height,the width of crown,the number and density of branch,the length and thickness of the biggest branch,the length and node number of twigs can be used as indirect index for the selection of volume,height under branch and taperness.
出处
《河南林业科技》
1998年第3期8-11,共4页
Journal of Henan Forestry Science and Technology
关键词
毛白杨
性状组
典型相关
Populus tomentosa Carr
Characteristic group
Canonical correlation
