Fig. 4

Phylogenetic tree of effector gene family 8 (a) Simplified phylogenetic tree of the five lineages of B. graminis used in this study (modified form Menardo et al. [22]). The median estimation for the divergence time is reported at each bifurcation of the tree. b Maximum likelihood tree of CEG family 8. Branches are colored according to the lineage of B. graminis to which the respective effector gene belongs. The species tree with the color code is represented in panel a. Branch labels report the bootstrap support for the clade inferred with 1000 replications. The scale is in expected amino-acid substitutions per site. In the lowest part of the tree there is one of the few effector genes in B. graminis for which we found a single copy in all lineages and for which the gene tree is concordant to the species tree. Two large lineage-specific expansions (18 genes in B.g. on Lolium and 9 genes in B.g. poa) are present in the upper part of the figure