Figure 4. Presence of beta-tubulin paralogs in V. dahliae and V. longisporum isolates.
Shown is a most parsimonious tree from a 18 taxa, 666 character dataset, 399 steps in length. The taxa selected represent the major clades from the five-locus tree in Figure 2. Isolates are represented by a strain identifier. Hosts and geographic origins are given. Arrows in the right mark the pairs of paralogs present in V. dahliae strains PD322 and PD363 as well as V. longisporum strain PD614. The tree suggests that the paralogs originated before speciation in Verticillium. No paralogs were found in any of the other taxa included in the tree, but not all taxa used in this study were investigated for the presence of beta-tubulin paralogs.