Comparison of POP gene tree and species tree. A. POP gene tree. POPB lineage was highlighted in red; POPA lineage in blue. B. Species tree based on rpb2. Corresponding species for the POPB lineage were highlighted in red. Amanita lineage was indicated by a black bar. C. Reconciled tree by Notung. Yellow arrows indicated gene transfer. The green circles showed where the alternative transfer events occured. The transfer events in the strongly supported POPB lineage were marked as T1, T2 and T3.