1. Key Laboratory of Bioresources and Ecoenvironment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, People's Republic of China.
2. Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, People's Republic of China.
3. Collaborative Innovation Center for Ecological Animal Husbandry of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, People's Republic of China.