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Figure 4 | BMC Evolutionary Biology

Figure 4

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 4

Paralogous chromosome blocks in the zebrafish genome. Gene families and colors applied as in Figure 3. Dashed boxes indicate divergences between the NJ tree and PhyML tree topologies. The color of the dashes nonetheless indicate the likely homology relationships. Orthologs of the human genes located on chromosomes 1, 3 and X are intermingled on zebrafish chromosomes 22, 8, 6, 11 and 23, indicating major rearrangements. In addition genes located on human chromosomes 7 and 12 and chicken chromosome 1 have orthologs on zebrafish chromosomes 25 and 4, indicating 3R-generated chromosome blocks. The black arrowhead marks the four local duplicates of the RH2 gene in the zebrafish genome (see Table 1). The full conserved synteny analysis, including all gene families and three-spined stickleback, is included in Additional file 5.

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