1 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.
2 Key Laboratory of Ruminant Genetics, Breeding & Reproduction, Ministry of Agriculture, China; Key Laboratory of Animal Biotechnology of Xinjiang, Institute of Biotechnology, Xinjiang Academy of Animal Science, Urumqi, Xinjiang 830026, China.
3 Key Laboratory of Ruminant Genetics, Breeding & Reproduction, Ministry of Agriculture, China; Key Laboratory of Animal Biotechnology of Xinjiang, Institute of Biotechnology, Xinjiang Academy of Animal Science, Urumqi, Xinjiang 830026, China. Electronic address: xjlmj2006@126.com.
4 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. Electronic address: yu.jiang@nwafu.edu.cn.