Figure 1

The global pattern of Populus DNA methylomes. (a) The percentage of methylated cytosines distribution in each sequence context (H=A, T, C). The y axis indicates the percentage methylated cytosines according to each methylation level which show on x axis.(methylation level = # of mC / # of C * 100%) (b) Distribution of CG, CHG and CHH methylation levels in each sequence context of gene related region, including upstream, first exon, first intron, internal exon, internal intron, last exon and downstream.. The x axis shows seven elements, the y axis represents average methylation levels of cytosines. The red dots represent average methylation levels of bins, the curve shows the average value of 5 bins with 1-bin step, and the green dotted line indicate TSSs (transcription start sites) (c) The percentage and absolute number of methylated cytosines that identified in WW(left) and WS(right) in each sequence context.