1. State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, College of Life Sciences, Inner Mongolia University, Hohhot 010070, China
2. Animal Husbandry Institute, Agriculture and Animal Husbandry Academy of Inner Mongolia, Hohhot 010031, China
3. College of Biological Science and Technology, Bao Tou Teachers’ College, Baotou 014030, China
4. Institutes of Biomedical Sciences, the Key Laboratory of Medical Molecular Cell Biology of Shanxi Province, Shanxi University, Taiyuan 030006, China