Fig. 4From: Transcriptome analysis reveals a molecular understanding of nicotinamide and butyrate sodium on meat quality of broilers under high stocking densityVolcanic map of differential expression genes. The abscissa is the fold change of the gene expression difference between the two samples and the ordinate is the statistical test value of the gene expression. Each dot in the figure represents a specific gene, the red dot indicates a significantly up-regulated gene, the green dot indicates a significantly down-regulated gene, and the grey dot is a non-significant differential geneBack to article page