Funding for this research was provided by:
Basic Research Programs of Sichuan Province (No: 2019YJ0256)
Program of Provincial Department of Finance of the Tibet Autonomous Region (No: XZNKY-2019-C-052)
Program National Beef Cattle and Yak Industrial Technology System (No: CARS-37)
Open Project Program of State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement (NO:XZNKY-2019-C-007K10)
Received: 21 January 2020
Accepted: 14 October 2020
First Online: 20 October 2020
Ethics approval and consent to participate
: The whole study and protocols for collection of the semen samples of yaks were reviewed and approved by the Ethics Committee at Institute of Animal Science and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences (Permit Number: 2015–216). Written informed consent was obtained from the farm owners.
: Not applicable.
: The authors declare that they have no competing interests.