1. National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University , Beijing, China
2. College of Animal Science and Technology, Huazhong Agricultural University , Wuhan, China
3. Institute of Animal Husbandry and Veterinary, Academy of Agricultural Sciences of Tianjin , Tianjin, China
4. State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University , Beijing, China
5. State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing, China