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Diversifying selection drives parallel evolution of gill raker number and body size along the speciation continuum of European whitefish

Permanent lenke
https://hdl.handle.net/10037/13390
DOI
https://doi.org/10.1002/ece3.3876
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article.pdf (1.301Mb)
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Dato
2018-02-05
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Häkli, Katja; Østbye, Kjartan; Kahilainen, Kimmo Kalevi; Amundsen, Per-Arne; Præbel, Kim
Sammendrag
Adaptive radiation is the evolution of ecological and phenotypical diversity. It arises via ecological opportunity that promotes the exploration of underutilized or novel niches mediating specialization and reproductive isolation. The assumed precondition for rapid local adaptation is diversifying natural selection, but random genetic drift could also be a major driver of this process. We used 27 populations of European whitefish (Coregonus lavaretus) from nine lakes distributed in three neighboring subarctic watercourses in northern Fennoscandia as a model to test the importance of random drift versus diversifying natural selection for parallel evolution of adaptive phenotypic traits. We contrasted variation for two key adaptive phenotypic traits correlated with resource utilization of polymorphic fish; the number of gill rakers and the total length of fish, with the posterior distribution of neutral genetic differentiation from 13 microsatellite loci, to test whether the observed phenotypic divergence could be achieved by random genetic drift alone. Our results show that both traits have been under diversifying selection and that the evolution of these morphs has been driven by isolation through habitat adaptations. We conclude that diversifying selection acting on gill raker number and body size has played a significant role in the ongoing adaptive radiation of European whitefish morphs in this region.
Beskrivelse
Source at https://doi.org/10.1002/ece3.3876 .
Er en del av
Häkli, K. (2019). The speciation landscape of European whitefish in Northern Fennoscandia – the importance of deglaciation history, standing genetic variation and natural selection. (Doctoral thesis). https://hdl.handle.net/10037/16887.
Tilknyttede forskningsdata
Häkli, K., Østbye, K., Kahilainen, K.K., Amundsen, P. & Præbel, K. (2018). Data from: Diversifying selection drives parallel evolution of gill raker number and body size along the speciation continuum of European whitefish. Dryad Digital Repository. https://doi.org/10.5061/dryad.rr7v5.
Forlag
Wiley Open Access
Sitering
Häkli, K., Østbye, K., Kahilainen, K.K., Amundsen, P-A.& Præbel, K. (2018). Diversifying selection drives parallel evolution of gill raker number and body size along the speciation continuum of European whitefish. Ecology and Evolution, 8(5), 2617-2631. https://doi.org/10.1002/ece3.3876.
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