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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Parallel reduction in expression, but no loss of functional constraint, in two opsin paralogs within cave populations of Gammarus minus (Crustacea: Amphipoda)

Figure 2

Maximum likelihood phylogeny of Gammarus minus and selected arthropod and onychophoran opsin protein sequences. Known long-wavelength-sensitive (LWS), middle-wavelength-sensitive (MWS), and short-wavelength-sensitive (SWS) opsins, along with various stomatopod and onychophoran opsin protein sequences were downloaded from GenBank (see Additional file 1) and analyzed in PhyML 3.0 using a BLOSSUM62 + Gamma best fit model of protein evolution determined with ProtTest 3. Numbers in square brackets indicate the wavelength of maximum absorbance (λmax), letters indicate the major stomatopod opsin groups identified by Porter et al. 2009 [32]. Bootstrap support (1000 replicates) are provided above nodes supported in ≥70% of the replicates. The Gammarus minus opsin paralogs are monophyletic, share a most recent common ancestor, and placed within the crustacean LWS group.

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BMC Ecology and Evolution

ISSN: 2730-7182

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