1. College of Animal Science and Technology Chongqing Key Laboratory of Forage & Herbivore Chongqing Engineering Research Centre for Herbivores Resource Protection and Utilization Southwest University Chongqing 400716 China
2. Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan province Sichuan Agricultural University Chengdu Sichuan 625014 China
3. Institute of Animal Science Chinese Academy of Agricultural Sciences (CAAS) Beijing 100193 China
4. College of Animal Science and Technology Qingdao Agricultural University Qingdao 266109 China