Abstract
AbstractThe genetic diversity within a species is a reflection of its evolutionary past and ongoing mutation, drift, and adaptation. Species that occupy a diverse range of habitats and that have adapted for generations under selective pressures will carry a genetic imprint of that adaptation within specific functional genes. Alternatively, genetic diversity may be reduced owing to historical bottlenecks and genetic drift. In this study, genetic diversity was estimated in four species of Pacific salmon (rainbow trout, steelhead [anadromous rainbow trout] Oncorhynchus mykiss, Chinook salmon O. tshawytscha, coho salmon O. kisutch, and sockeye salmon, kokanee [lacustrine sockeye salmon] O. nerka) using 563–608 kilo–base pairs of DNA sequence data from 32 individuals per species. Individual samples were chosen to represent the major lineages of each species across their natural ranges. The results show the highest genetic diversity estimates for rainbow trout and the lowest for sockeye salmon. Statistically significant differences were observed between the species with the highest genetic diversity (rainbow trout) and the three remaining species. Loci with the highest genetic diversity within each species are listed as potentially being influenced by balancing selection.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.