The leaves of transplant had the characteristic of the spontaneous root in MSo medium. The rate of rooting, length of roots, number of roots, height of plant and phenotypic variation of transgenic triploid Chinese white poplar clone were studied.

• 对转基因三倍体毛白杨无性系试管苗生根率、根长、根数量、茎高生长及表型变异进行研究,结果表明:转基因三倍体毛白杨植株与对照相比,转基因三倍体毛白杨明显提高了组培苗的生根率,且根系发达;