Orthologous Divergence and Paralogous Anticonvergence in Molecular Evolution of Triplicated Green Opsin Genes in Medaka Fish, Genus Oryzias.

ABSTRACT: Gene duplication of green (RH2) opsin genes and their spectral differentiation are well documented in many teleost fish. However, their evolutionary divergence or conservation patterns among phylogenetically close but ecologically diverse species is not well explored. Medaka fish (genus Oryzias) are broadly distributed in fresh and brackish waters of Asia, with many species being laboratory-housed and feasible for genetic studies. We previously showed that a Japan strain (HNI) of medaka (Oryzias latipes) possessed three RH2 opsin genes (RH2-A, RH2-B, and RH2-C) encoding spectrally divergent photopigments. Here, we examined the three RH2 opsin genes from six Oryzias species representing three species groups: the latipes, the celebensis, and the javanicus. Photopigment reconstitution reveale

SUBMITTER: Matsumoto Y 

PROVIDER: S-EPMC7337190 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature