1. Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
2. Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing 210014, China
3. Key Laboratory for Crop and Animal Integrated Farming, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China
4. College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China