1. National Engineering Laboratory for Animal Breeding; Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture; Beijing Key Laboratory for Animal Genetic Improvement; College of Animal Science and Technology; China Agricultural University; Beijing China
2. College of Animal Science and Technology; Jilin Agricultural University; Changchun Liaoling China
3. College of Animal Science and Technology; Sichuan Agricultural University; Chengdu Sichuan China