Origin and diversification of Altai osmans (Oreoleuciscus), Far Eastern phoxinin minnows (Rhynchocypris) and Far Eastern redfins (Tribolodon) of the Leuciscidae family (Actinopterygii): an example of evolutionary tempo variation?
摘要
The partial sequence of the mitochondrial gene for cytochrome oxidase subunit I (COI) has been analyzed in representatives of the genera Oreoleuciscus, Tribolodon, and Rhynchocypris, using Phoxinus phoxinus as an outgroup. The genus Rhynchocypris includes only freshwater fish (which is typical for cyprinids), while representatives of the genera Tribolodon and Oreoleuciscus have colonized the sea and water bodies of the arid zone (including brackish ones), respectively. The data we obtained suggest that during the colonization of these waters and the formation of these two genera, evolution accelerated, but subsequently, at the stage of adaptive radiation of all three genera, their evolutionary rates no longer differed.