Phylogenetic tree of DNA transposon sequences in Salmo salar and various other species. A) Tc1-like DNA transposons; B) piggyBac-like DNA transposons. Sequence alignments were performed with ClustalW and phylogenetic trees generated with MEGA3.1 using the Unweighted Pair Group Method with Arithmetic Mean (UPGMA), pairwise deletion, and a p-distance model. Sequences used in the tree are at least 1000 bp, but EST sequences from Schistosoma japonicum are between 500 and 700 bp long. DTSsa3 is not included in the tree as only fragments of a few hundred base pairs were recovered that conform to the amino acid motifs required for a Tc1-like transposon. DTSsa5 has two copies that are closely related due to a recent duplication event. Shown below are the color markers for the species. No marker in the tree indicates Salmo salar. All others are: Acanthophthalmus kuhli; Astatotilapia burtoni; Carassius auratus; Cyprinus carpio; Danio rerio; Deltistes luxatus; Esox lucius; Gasterosteus aculeatus; Ictalurus punctatus; Oncorhynchus kisutch; Oncorhynchus mykiss; Oncorhynchus tsawytscha; Oryzias latipes; Petromyzon marinus; Polypterus bichir; Rana pipiens; Salvelinus fontinalis; Schistosoma japonicum; Tanichthys albonubus; Xenopus tropicalis; Xenopus laevis.
de Boer et al. BMC Genomics 2007 8:422 doi:10.1186/1471-2164-8-422