1. Innovation Experimental College, Northwest A&F University, Yangling, Shaanxi, P. R. China
2. College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, Shaanxi, P. R. China
3. School of Statistics and Information, ShangHai University of International Business and Economics, Shanghai, P. R. China
4. Xianan Cattle Technology Development Company, Biyang, Henan, P. R. China
5. Bureau of Animal Husbandry, Biyang, Henan, P. R. China
6. Animal Husbandry Technology Promotion Station of Jiangxi, Nanchang, Jiangxi, P. R. China