Figure 4. Accelerated rate of evolution in M. graminicola.

Estimates of evolutionary rates for Mycosphaerella graminicola and its two closest relatives “S1 and “S2” (see Figure 2) under a relaxed clock model. Mean rates for internal branches of the β-xylosidase-based phylogeny are shown as filled circles for M. graminicola, squares for the lineage “S2”, and diamonds for the lineage “S1”, respectively.