State Key Laboratory of Animal Biotech Breeding;
Frontiers Science Center for Molecular Design Breeding;
Ministry of Agriculture Key Laboratory of Soil Microbiology;
and Department of Microbiology and Immunology;
College of Biological Sciences;
China Agricultural University;
Beijing;
100193;
China;
Porcine reproductive and respiratory syndrome; virus(PRRSV); miR-204; Autophagy; LC3B;