Acknowledgments
This study was supported by grants from the National Natural Science
Foundation of China (Grant no. 32172890 and 32002315), the China
Postdoctoral Fund (Grant no. 2020M680788), the Natural Science
Foundation of Heilongjiang Province (Grant no. YQ2019C032 and
YQ2019C030), and the State Key Laboratory of Veterinary Biotechnology
Foundation (Grant no. SKLVBF202115).