Fig. 6: examples of haplotype topologies which are compatible with a single hybridisation event between TcII and TcIII (A) and incompatible with the hypothesis of a single hybridisation event (B). Arrows indicate when hybridisation events could have occurred in the haplotype history. Note that for A the TcV and TcVI haplotypes diverged after hybridisation event whereas in B the haplotypes diverged before hybridisation events. It is important to consider that the topology A is also compatible with multiple hybridisation events (particularly when the sampled TcIII strain is distantly related to the parental TcIII strain involved into the hybridisation). The same example applies for TcII-TcV-TcVI haplotype history.