Corresponding Author

Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China

Correspondence

Chao Sun, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China.

Email: schao@nwafu.edu.cn

Yongnian Liu, Department of Pathophysiology, Medical College, Qinghai University, Xining 810001, China.

Email: liuyongnian@qhu.edu.cn.