Evolution of Three Parent Genes and Their Retrogene Copies in Drosophila Species
Figure 2
Phylogenetic analysis of three gene pairs shows that parent genes and retrogenes form independent clades. Maximum-likelihood trees were constructed from codon alignments of orthologs of each gene pair. Pink and blue highlightings correspond to parent genes and retrogenes, respectively. Trees are rooted to highlight relationships between parent genes, retrogenes, and singletons. (a) CG8331 and CG4960 (CG8331 is missing from Dbia due to a gap in the genome assembly); (b) CG17734 and CG11825 (CG17734 is missing from Dtak due to a gap in the genome assembly, and CG11825 was deleted in Dere); (c) Sep2 and Sep5 (Sep5 is missing from Dfic due to a gap in the genome assembly); (d) cladogram showing phylogeny of sequenced Drosophila species, according to Yang et al. [23]. Dmel, D. melanogaster; Dsim, D. simulans; Dsec, D. sechellia; Dyak, D. yakuba; Dere, D. erecta; Deug, D. eugracilis; Dbia, D. biarmipes; Dtak, D. takahashii; Dfic, D. ficusphila; Dele, D. elegans; Drho, D. rhopaloa; Dkik, D. kikkawai; Dbip, D. bipectinata; Dana, D. ananassae; Dpse, D. pseudoobscura; Dper, D. persimilis; Dwil, D. willistoni; Dmoj, D. mojavensis; Dvir, D. virilis; Dgri, D. grimshawi.
