Abstract
We used 11 Populus simonii × P. nigra clones including ten transgenic poplar clones and one control clone in six-year old to study 15 traits including growth traits,shape of stem,leaf traits,and lenticel traits. By ANOVA analysis,there was significant difference in all the traits among 11 clones( P 0. 01). The coefficients of phenotypic variation( PCV) of different traits ranged in 1. 92%- 39. 98%,the coefficients of genetic variation( GCV) were closed to PCV and repeatability( R) ranged in 0. 621- 0. 987,which indicated that the TaLEA gene transfer can influence the plant growth. but the impact were strong controlled by genetic factor. By phenotypic correlation analysis,there were varying degree correlations between growth traits,stem traits,leaf traits and lenticel traits,which indicated that all the traits combined action on plant growth and development.When the selection rate was 10%,XL-1 and XL-9 were selected as the best clones. The average height and diameter at breast height of these two clones were higher than those of CK( average of all the clones) by 16.55%( 13. 38%) and 15. 38%( 19. 46%),and the genetic gain of these clones were 12. 18% and 17. 42% in height and diameter at breast height,respectively.
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