Funding for this research was provided by:
Beijing Municipal Natural Science Foundation (6192013)
National Natural Science Foundation of China (31772813, 31572587)
Key Technologies Research and Development Program (2016YFD0501203)
Hebei Key R&D Project (19226607D)
High-end Foreign Experts Recruitment Program (GDT20171100013)
Received: 3 July 2020
Accepted: 29 December 2020
First Online: 19 January 2021
Ethics approval and consent to participate
: The current work was carried out according to ethical guidelines of China Agricultural University (CAU), Beijing, and approved by China Agricultural University Animal Ethics Committee (protocol CAUAEC-2010–0603). There were no vulnerable populations involved and no endangered species used in the experiment.
: Not applicable.
: The authors declare that they have no competing interests.