Tian Xiaoming1, Xie Jin1, Qu Long1, Liu Shichang1, Li Jianmei1, Du Hongshuang2, Jiang Xiangning3, Gai Ying3
1. College of Biological Sciences and Biotechnology, Beijing Forestry University Beijing 100083;2. Forestry College, Beihua University Jilin 132013;3. Tree and Ornamental Plant Breeding and Biotechnology Laboratory of State Forestry Administration National Engineering Laboratory for Tree Breeding Beijing 100083