Fig. 5

Expression heatmap of strawberry PME family genes at developmental stages of fruit. The expression levels of PME genes were measured by RNA-seq analysis at different stages of fruit in five varieties. The color scale at the left represents RPKM normalized by log2. Blue indicates a low expression level, yellow indicates a medium, and green indicates a high level. Four PME genes, which are marked by dotted line, don’t have expression level during any developmental stages. And FvPME 7, 38, and 39 expressed abundantly during fruit development which are filled green color