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Rates of molecular evolution and genetic diversity in European vs. North American populations of invasive insect species
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Rates of molecular evolution and genetic diversity in European vs. North American populations of invasive insect species
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Journal Article
Rates of molecular evolution and genetic diversity in European vs. North American populations of invasive insect species
2018
Overview
Many factors contribute to the 'invasive potential' of species or populations. It has been suggested that the rate of genetic evolution of a species and the amount of genetic diversity upon which selection can act may play a role in invasiveness. In this study, we examine whether invasive species have a higher relative pace of molecular evolution as compared with closely related non-invasive species, as well as examine the genetic diversity between invasive and closely related species. To do this, we used mitochondrial cytochrome c oxidase subunit I sequences of 35 species with a European native range that are invasive in North America. Unique to molecular rate studies, we permuted across sequences when comparing each invasive species with its sister clade species, incorporating a range of recorded genetic variation within species using 405,765 total combinations of invasive, sister, and outgroup sequences. We observed no signifi cant trend in relative molecular rates between invasive and non-invasive sister clade species, nor in intraspecifi c genetic diversity, suggesting that differences in invasive status between closely related lineages are not strongly determined by the relative overall pace of genetic evolution or molecular genetic diversity. We support previous observations of more often higher genetic diversity in native than invaded ranges using available data for this genetic region.
