Fig. 2

Molecular phylogeny of prospective XKol transposases. Molecular phylogenetic trees of XKol-Tpase amino acid sequences inferred using the neighbor-joining method. Each operational taxonomic unit is represented by the names of the CDS and a chromosome or scaffold on which the CDS is located. The number of blastn hits to truncated transposase sequences are shown as numerals following the vertical bar. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (500 replicates) are shown next to the branches. The symbol “+” on the branches indicates domestication events. Asterisks indicate transpositional amplification events. Subfamilies of putative domesticated transposase orthologs are grouped by black bars and named D1–D9. CDS subfamilies that may have been duplicated by recent transposition and amplification are grouped by gray bars and designated A1–A6