Signatures of local adaptation along environmental gradients in a range-expanding damselfly (Ischnura elegans)

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Dudaniec, Rachael Y.Macquarie University, Sydney (author)

Signatures of local adaptation along environmental gradients in a range-expanding damselfly (Ischnura elegans)

Article/chapterEnglish2018

Publisher, publication year, extent ...

2018-05-19
Wiley,2018

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LIBRIS-ID:oai:lup.lub.lu.se:26b85213-a647-4f43-8204-cf02bd0db3f4
https://lup.lub.lu.se/record/26b85213-a647-4f43-8204-cf02bd0db3f4URI
https://doi.org/10.1111/mec.14709DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype

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Insect distributions are shifting rapidly in response to climate change and are undergoing rapid evolutionary change. We investigate the molecular signatures underlying local adaptation in the range-expanding damselfly, Ischnura elegans. Using a landscape genomic approach combined with generalized dissimilarity modelling (GDM), we detect selection signatures on loci via allelic frequency change along environmental gradients. We analyse 13,612 single nucleotide polymorphisms (SNPs), derived from restriction site-associated DNA sequencing (RADseq), in 426 individuals from 25 sites spanning the I. elegans distribution in Sweden, including its expanding northern range edge. Environmental association analysis (EAA) and the magnitude of allele frequency change along the range expansion gradient revealed significant signatures of selection in relation to high maximum summer temperature, high mean annual precipitation and low wind speeds at the range edge. SNP annotations with significant signatures of selection revealed gene functions associated with ongoing range expansion, including heat shock proteins (HSP40 and HSP70), ion transport (V-ATPase) and visual processes (long-wavelength-sensitive opsin), which have implications for thermal stress response, salinity tolerance and mate discrimination, respectively. We also identified environmental thresholds where climate-mediated selection is likely to be strong, and indicate that I. elegans is rapidly adapting to the climatic environment during its ongoing range expansion. Our findings empirically validate an integrative approach for detecting spatially explicit signatures of local adaptation along environmental gradients.

Subject headings and genre

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
Environmental association analysis
Insects
Ischnura
Landscape genomics
Local adaptation
Range expansion

Added entries (persons, corporate bodies, meetings, titles ...)

Yong, Chuan JiMacquarie University, Sydney (author)
Lancaster, Lesley T.University of Aberdeen(Swepub:lu)biol-lel (author)
Svensson, Erik I.Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Evolutionary ecology,Department of Biology,Faculty of Science(Swepub:lu)ekol-esv (author)
Hansson, BengtLund University,Lunds universitet,MEMEG,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science(Swepub:lu)ekol-bhn (author)
Macquarie University, SydneyUniversity of Aberdeen (creator_code:org_t)

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In:Molecular Ecology: Wiley27:11, s. 2576-25930962-1083

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Evolutionary Bio ...

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Ecology

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By the university: Lund University

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