1 State Key Laboratory of Tree Genetics and Breeding, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, China.
2 State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration, Chinese Academy of Forestry, Beijing, China.
3 Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States.