Fig. 3

Transcriptome data analysis. PCA analysis of HRFI and LRFI duck genes (A). Differentially expressed liver genes between HRFI and LRFI ducks. A curated list of 338 genes of the liver were analyzed the associated with possible effects on feed intake genes were labeled on the plot. Two vertical lines indicate gene expression fold change (HRFI vs. LRFI) > 1.2 and < − 1.2, respectively, and the horizontal line indicates the adjusted P value (FDR q-value) of 0.05. P values were calculated by two-sided Wilcoxon rank-sum test. The color of the dot represents the FDR (q-value) levels (B). PPI network diagram of liver differential genes. Nodes represent proteins. The node size and color represent the mean abundance of genes expression. Edges represent protein-protein associations. The relationship between the 2 proteins is expressed through the thickness of the line; the thicker the line, the closer the relationship. The color represents the combined score, it was analysed by cytoscape (C). Hub genes and expression profiles of PPI net work. Degree is used as the evaluation criterion, and the darker the color of the node, the higher its Degree score (D). Pathways identified in the transcriptomes. The Wilcoxon rank-sum test was used for mean comparison, *P < 0.05 (E)