LncRNAs are differentially regulated during PRV infection. A Flowchart of RNA-seq experiment design. B Hierarchical clustering analysis of DEGs. DEG expression levels are represented as FPKM-normalized log2-transformed counts. Blue indicates low relative expression, and red indicates high relative expression. C Pie charts of significantly changed lncRNAs with a P-value of ≤ 0.05. Red and yellow colors denote downregulated and upregulated genes, respectively.