Acknowledgements
This study was primarily supported by a grant (Grant No. 2019B020217002) from the Guangdong Provincial Department of Science and Technology, and two grants (Disciplinary Team Construction Program, Grant No. 201634TD and Jinying’s Star Talent Program, Grant No. R2018PY-JX003) from Guangdong Academy of Agricultural Sciences, and two grants (Grant Nos. 2019KJ114 and 2019KJ119) from Guangdong Provincial Department of Agriculture and Rural Affairs. Moreover, this study was also partially supported by Maoming Branch and Zhaoqing Branch, Guangdong Laboratory for Lingnan Modern Agriculture, and Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture of Rural Affairs, and the Key Laboratory of Animal Disease Prevention of Guangdong Province.