1. State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, P.R. China.
2. Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, No. 159 Lonpan Road, Nanjing, 210037, Jiangsu, China.
3. School of Renewable Natural Resources, Louisiana State University, Agricultural Center, Baton Rouge, LA 70803, USA.