1. College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, Henan, China
2. Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
3. Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, 36849-5501 Auburn, Alabama, USA