College of Animal Science, Guizhou University, Guiyang 550025, P.R.China;
College of Animal Science, Guizhou University, Guiyang 550025, P.R.China;
Institute of Animal Science, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, P.R.China;
State Key Laboratory of Animal Nutrition, Ministry of Science and Technology/College of Animal Science and Technology, China Agricultural University, Beijing 100193, P.R.China;