1. Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region Ministry of Education College of Animal Science Guizhou University Guiyang, Guizhou China
2. National Engineering Research Center for Breeding Swine Industry College of Animal Science South China Agricultural University Guangzhou Guangdong China
3. Guizhou Provincial Key Laboratory of Animal Genetics, Breeding and Reproduction College of Animal Science Guizhou University Guiyang China