1. College of Animal Science, Inner Mongolia Agricultural University, Hohhot, China;
2. Reproductive Medicine Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China;
3. Ministry of Agriculture, Key Laboratory of Mutton Sheep Genetics and Breeding, Hohhot, China;
4. Key Laboratory of Animal Genetics, Breeding and Reproduction in Inner Mongolia Autonomous Region, Hohhot, China;
5. Engineering Research Center for Goat Genetics and Breeding, Inner Mongolia Autonomous Region, Hohhot, China