1. College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
2. Farm Animal Genetic Resource Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
3. College of Life and Biology Science, Sichuan Agricultural University, Chengdu, China
4. Chongqing Academy of Animal Science, Rongchang, China
5. Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China