Funding for this research was provided by:
National Natural Science Foundation of China (31702225)
Agricultural Science and Technology Innovation Program (CAAS-ASTIP-2016-LVRI-03)
the International Science and Technology Cooperation Project of Gansu Provincial Key Research and Development Program (17JR7WA031)
Text and Data Mining valid from 2020-02-13
Received: 30 June 2019
Accepted: 3 February 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the recommendations set forth in the Animal Ethics Procedures and Guidelines of the People’s Republic of China. This study was reviewed and approved by the Animal Administration and Ethics Committee of Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences.
: Not applicable.
: The authors declare that they have no competing interests.