1. State Key Laboratory of Tree Genetics and Breeding Chinese Academy of Forestry Beijing PR China
2. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry Chinese Academy of Forestry Beijing PR China
3. Research Institute of Forest Resource Information Techniques Chinese Academy of Forestry Beijing PR China
4. Department of Biological Science, Institute of Environment Sciences University of Quebec at Montreal Montreal Quebec Canada
5. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University Yangling PR China
6. College of Horticulture and Forestry Sciences, Hubei Engineering Technology Research Center for Forestry Information Huazhong Agricultural University Wuhan PR China