Affiliation: | 1. Institute of Animal Science, Chinese Academy of Agricultural Science,Beijing 100193;2. College of Wildlife Resources, Northeast Forestry University,Harbin 150040;3. College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering &4. Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A &5. F University,Yangling, Shaanxi 712100, P. R. China |