1. College of Animal Science, Xichang University, Xichang 615013, China
2. Department of Pharmacy, Sichuan Agricultural University, Chengdu 611130, China
3. Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu 610066, China
4. Chengdu Animal Genetic Resources Protection Center, Chengdu 611130, China
5. College of Animal Science, Sichuan Agricultural University, Chengdu 611130, China