1. College of Animal Science and Technology, Sichuan Agricultural University, Sichuan, People's Republic of China.
2. Chongqing Animal Husbandry Institute, Chongqing, People's Republic of China.
3. National Engineering Center for Biochip at Shanghai, Shanghai, People's Republic of China.
4. Animal Husbandry Institute of Ganze Tibetan Autonomous Prefecture, Sichuan, People's Republic of China.