Figure 3

Split decomposition graph of the E. coli strains. Visual representation of the conflict in the phylogenetic signals among 30 strains of E. coli, for (A) the core genes (n = 2317) and (B) the shell genes (n = 3511). The strains are tagged for pathogenicity with red nodes for PATH and blue nodes for NON-PATH E. coli. Splitstree4 http://www.splitstree.org/ was used for both display, with the Neighbor-Net algorithm [51].