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Gene flow relates t...
Gene flow relates to evolutionary divergence among populations at the range margin
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- Kanuch, Peter (author)
- Slovak Acad Sci, Inst Forest Ecol, Zvolen, Slovakia.,Slovak Academy of Sciences
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- Kiehl, Berrit (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Uppsala universitet,Evolutionsbiologi,Swedish Univ Agr Sci, Dept Ecol, Uppsala, Sweden.,Institutionen för ekologi,Department of Ecology,Uppsala University
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- Lundhagen, Anna (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology,Swedish Univ Agr Sci, Dept Ecol, Uppsala, Sweden.
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- Laugen, Ane (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology,Novia University of Applied Sciences,University of Agder,Swedish Univ Agr Sci, Dept Ecol, Uppsala, Sweden.;Novia Univ Appl Sci, Bioecon Res Team, Ekenas, Finland.;Univ Agder, Dept Nat Sci, Kristiansand, Norway.
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- Low, Matthew (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology,Swedish Univ Agr Sci, Dept Ecol, Uppsala, Sweden.
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- Berggren, Åsa (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology,Swedish Univ Agr Sci, Dept Ecol, Uppsala, Sweden.
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Slovak Acad Sci, Inst Forest Ecol, Zvolen, Slovakia Slovak Academy of Sciences (creator_code:org_t)
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- 2020-10-22
- 2020
- English.
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In: PeerJ. - : PeerJ. - 2167-8359. ; 8
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Abstract
Subject headings
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- Background: Morphological differentiation between populations resulting from local adaptations to environmental conditions is likely to be more pronounced in populations with increasing genetic isolation. In a previous study a positive clinal variation in body size was observed in isolated Roesel's bush-cricket, Metrioptera roeselii, populations, but were absent from populations within a continuous distribution at the same latitudinal range. This observational study inferred that there was a phenotypic effect of gene flow on climate-induced selection in this species. Methods: To disentangle genetic versus environmental drivers of population differences in morphology, we measured the size of four different body traits in wild-caught individuals from the two most distinct latitudinally-matched pairs of populations occurring at about 60 degrees N latitude in northern Europe, characterised by either restricted or continuous gene flow, and corresponding individuals raised under laboratory conditions. Results: Individuals that originated from the genetically isolated populations were always bigger (femur, pronotum and genital appendages) when compared to individuals from latitudinally-matched areas characterised by continuous gene flow between populations. The magnitude of this effect was similar for wild-caught and laboratory-reared individuals. We found that previously observed size cline variation in both male and female crickets was likely to be the result of local genetic adaptation rather than phenotypic plasticity. Conclusions: This strongly suggests that restricted gene flow is of major importance for frequencies of alleles that participate in climate-induced selection acting to favour larger phenotypes in isolated populations towards colder latitudes.
Subject headings
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- Adaptive divergence
- Body size
- Climate
- Genetic isolation
- Orthoptera
Publication and Content Type
- ref (subject category)
- art (subject category)
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