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Figure 6 | BMC Evolutionary Biology

Figure 6

From: The vertebrate ancestral repertoire of visual opsins, transducin alpha subunits and oxytocin/vasopressin receptors was established by duplication of their shared genomic region in the two rounds of early vertebrate genome duplications

Figure 6

Visual opsin gene repertoires in vertebrates. The tree to the left shows the evolutionary relationship between species used in our analyses, with the time-windows for the 2R and 3R events. The upper tree shows the relationship between LWS, SWS1, SWS2, RH1 and RH2 visual opsins inferred from phylogenetic analyses and synteny data. Black arrowheads mark the presence of local duplicates. The retrotransposition event that gave rise to intron-less rhodopsin (RH1) genes in spotted gar and teleosts is marked with a grey arrowhead in the left panel. The intron-less RH1 genes are called rho and rhol, and exorh denotes the exo-rhodopsin genes, using the approved zebrafish names. For human and zebrafish genes, the approved gene names are used as indicated in footnote a of Table 1.

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