Studyon Correlate Selection from Plus Clones of Populus tomentosa

plus clones,whichwere reselected from the plus trees in the light of morethan 50-year-old ortets and propagated by root sucker for 3-year-old rejuvenative clones,were used in this study: which mainly deals with the base genetic parameters and path analysis of the correlated heritability among 16 traits. The results show that the phenotype of superior genotype of Populus tomentosa are formed by big leaf-dry-weight,narrow and long leafform,large and sparse leaf serrate,long petiole and many branches. Some signs of longwood fibre length of P. tomentosa are big branch angle and leaf base angle.