1. Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
2. Animal Breeding and Genetics, Graduate School of Agricultural Science, Tohoku University, Sendai 980-8572, Japan
3. College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China
4. Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China