1. Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling Shaanxi, People’s Republic of China;
2. Henan University of Animal Husbandry and Economy, Zhengzhou, Henan, People’s Republic of China;
3. Branch of Animal Science, Jilin Academy of Agricultural Sciences, Gongzhuling, Jilin, People’s Republic of China;
4. Bureau of Animal Husbandry of Biyang County, Biyang, Henan, People’s Republic of China;
5. Yunnan Academy of grassland animal science, Kunming, People’s Republic of China