1. College of Animal Science and Technology Hunan Provincial Key Laboratory for Genetic Improvement of Domestic Animal, Hunan Agricultural University Changsha Hunan China
2. Hunan Ningxiang Animal Husbandry and Fishery Affairs Center Ningxiang Hunan China
3. The Institute of Subtropical Agriculture The Chinese Academy of Sciences, Laboratory of Animal Nutrition Physiology and Metabolism Changsha Hunan China