Hierarchical clustering of expression profiles of Populus SET genes across different tissues, organs and treatments. The expression data were gene-wise normalized and hierarchically clustered based on the Pearson correlation. The relative expression levels of genes in each row are normalized against the maximum value. Colour scale at the top of each dendrogram represents log2 expression values, green represents low levels and red indicates high levels of transcript abundances. CL, continuous light-grown seedling; DL, etiolated dark-grown seedling transferred to light for 3 h; DS, dark-grown seedlings; YL, young leaf; ML, mature leaf; R, root; DX, differentiating xylem; FC, female catkins; MC, male catkins. G1-Sub1, G1-Sub2, G2, G3, G4 represent different subgroup.
Lei et al. BMC Evolutionary Biology 2012 12:51 doi:10.1186/1471-2148-12-51