1. Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Science Lanzhou 730050 China
2. State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangdong Laboratory of Lingnan Modern Agriculture, National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science South China Agricultural University Guangzhou 510642 China