1. Department of Pig Production, Chongqing Academy of Animal Science, Chongqing, China
2. State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
3. College of Animal Science and Technology, Southwest University, Chongqing, China
4. Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu, China
5. Key Laboratory of Animal Resource Evaluation and Utilization (Pigs), Ministry of Agriculture and Rural Affairs, Chongqing, China