Fig. 3

DNA methylation and mRNA expression of genes in different categories. A The methylation levels of different gene groups (with different mRNA expression levels) in the five-month-old group. Genes were divided into four groups according to the mRNA expression levels: none, low, medium, and high, and the DNA methylation levels in different groups were compared. B mRNA expression levels of different gene categories (with different methylation levels) in promoter regions of the five-month-old group. Genes were classified into five categories based on the methylation levels, from the bottom 20% to the top 20%, corresponding to the 1st to 5th groups, and the mRNA expression levels were compared. C mRNA expression levels of different gene categories (with different methylation levels) in gene body regions of the five-month-old group. D Correlation between DNA methylation and gene expression of promoter hypo-DMGs. E Correlation between DNA methylation and gene expression of gene body hyper-DMGs