1. Department of Clinical Veterinary Medicine , College of Veterinary Medicine, , Yangling, Shaanxi, China
2. Northwest A&F University , College of Veterinary Medicine, , Yangling, Shaanxi, China
3. Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs , Department of Clinical Veterinary Medicine, College of Veterinary Medicine, , Yangling, Shaanxi, China
4. Northwest A&F University , Department of Clinical Veterinary Medicine, College of Veterinary Medicine, , Yangling, Shaanxi, China
5. Laboratory of Animal Fat Deposition & Muscle Development , Department of Animal Genetics Breeding and Reproduction, College of Animal Science and Technology, , Yangling, Shaanxi, China
6. Northwest A&F University , Department of Animal Genetics Breeding and Reproduction, College of Animal Science and Technology, , Yangling, Shaanxi, China
7. Department of Preventive Veterinary Medicine , College of Veterinary Medicine, , Yangling, Shaanxi, China