Funding for this research was provided by:
National Natural Science Foundation of China (31972596, 31630074)
Beijing Municipal Natural Science Foundation (S170001)
Higher Education Discipline Innovation Project (B16044)
Jinxinnong Animal Science Developmental Foundation
Received: 25 August 2020
Accepted: 1 September 2020
First Online: 18 November 2020
Ethics approval and consent to participate
: All experimental protocols were approved by the China Agricultural University Animal Care and Use Committee (Approval No. AW12027102-1, Beijing, China).
: Not applicable.
: The authors declare that they have no competing interests.