Affiliation: | 1. Key Laboratory of Animal Genetics/Breeding and Reproduction of Ministry of Agriculture/National Engineering Laboratory for Animal Breeding/College of Animal Science and Technology, China Agricultural University, Beijing 100193;2. The Beijing Municipal Animal Husbandry Station, Beijing 100107;3. Beijing Liuma Pig Breeding Co., Ltd., Beijing 101308;4. Beijing Pig Breeding Center, Beijing 100194;5. Beijing Shunxin Agricultural Co., Ltd., Beijing 101300 |