Figure 4

A phylogenomic tree based on hierarchical clustering of the gene presence profile of all 20 oomycetes. The heat map indicates the gene presence profile of 178 representative genes (green and black represent gene presence and absence, respectively). The tree categorises all Pythium species, including Pythium vexans (currently reclassified as Phytopythium vexans; indicated by an asterisk), into clades A and B. The reliability of the trees tested by bootstrap analysis to support each branch is indicated.