Fig. 2.

—Evolutionary history of genes displaying presence–absence polymorphism. (A) Venn diagram of shared and specific orthologous gene group numbers displaying presence–absence polymorphism in Microbotryum lychnidis-dioicae (MvSl) and Microbotryum silenes-dioicae (MvSd). (B) Groups of Microbotryum species with orthologous gene sequences, for the genes displaying presence–absence polymorphism in MvSl and MvSd. We searched for orthologous groups in the sister species MvSl and MvSd and three closely related Microbotryum species: M. violaceum s. str. (MvSn), M. lagerheimii (MvSv), and M. intermedium (Mint).