Affiliation: | 1. College of Life Sciences, Xinyang Normal University, Xinyang, Henan 464000, P.R. China;2. College of Animal Husbandry and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, P.R. China;3. Institute of Animal Science, Chinese Academy of Agriculture Science, Beijing 100094, P.R. China;4. College of Animal Science and Technology, Inner Mongolia University for the Nationalities, Inner Mongolia, 028000, P.R. China |