10.5061/DRYAD.PN2MQ57
Mérot, Claire
Université Laval
Berdan, Emma
Université Laval
Babin, Charles
Université Laval
Normandeau, Eric
Université Laval
Wellenreuther, Maren
University of Auckland
Bernatchez, Louis
Université Laval
Berdan, Emma L.
University of Gothenburg
Data from: Inter-continental karyotype-environment parallelism supports a
role for a chromosomal inversion in local adaptation in a seaweed fly
Dryad
dataset
2018
Chromosomal inversions
environmental gradient
Balancing selection
2018-05-26T12:25:01Z
2018-05-26T12:25:01Z
en
https://doi.org/10.1098/rspb.2018.0519
296028 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Large chromosomal rearrangements are thought to facilitate adaptation to
heterogeneous environments by limiting genomic recombination. Indeed,
inversions have been implicated in adaptation along environmental clines
and in ecotype specialisation. Here, we combine classical ecological
studies and population genetics to investigate an inversion polymorphism
previously documented in Europe among natural populations of the seaweed
fly Coelopa frigida along a latitudinal cline in North America. We test if
the inversion is present in North America and polymorphic, assess which
environmental conditions modulate the inversion karyotype frequencies, and
document the relationship between inversion karyotype and adult size. We
sampled nearly 2,000 flies from 20 populations along several environmental
gradients to quantify associations of inversion frequencies to
heterogeneous environmental variables. Genotyping and phenotyping showed a
widespread and conserved inversion polymorphism between Europe and
America. Variation in inversion frequency was significantly associated
with environmental factors, with parallel patterns between continents,
indicating that the inversion may play a role in local adaptation. The
three karyotypes of the inversion are differently favoured across
micro-habitats and represent life-history strategies likely maintained by
the collective action of several mechanisms of balancing selection. Our
study adds to the mounting evidence that inversions are facilitators of
adaptation and enhance within-species diversity.
database_genotype_sizeIncludes information on origin, sex, genotype and
wing length for all the 1967 wild samples genotyped in the 20 populations
described in the article. Wing length is missing when the specimen wings
was too damaged to be measure
accurately.Adh_unphased_Dryad_march18Sequences of Adh locus aligned and
unphasedRib_unphased_Dryad_March2018Sequences of Rib locus aligned and
unphasedMet_unphased_dryad_march2018Sequences of Met locus aligned and
unphasedAdh_phased_Dryad_March18.phySequences of Adh locus aligned and
phased (phylip format)Met_phased_dryad_March18.phySequences of Met locus
aligned and phased (phylip format)Rib_phased_Dryad_March18.phySequences of
Rib locus aligned and phased (phylip format)