10.5061/DRYAD.VT8T7
Keller, Stephen R.
University of Maryland, College Park
Fields, Peter D.
University of Virginia
Berardi, Andrea E.
University of Virginia
Taylor, Doug R.
University of Virginia
Data from: Recent admixture generates heterozygosity-fitness correlations
during the range expansion of an invading species
Dryad
dataset
2014
Silene vulgaris
Heterosis
Holocene
2014-02-04T20:12:29Z
2014-02-04T20:12:29Z
en
https://doi.org/10.1111/jeb.12330
116184 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Admixture, the mixing of historically isolated gene pools, can have
immediate consequences for the genetic architecture of fitness traits.
Admixture may be especially important for newly colonized populations,
such as during range expansion and species invasions, by generating
heterozygosity that can boost fitness through heterosis. Despite
widespread evidence for admixture during species invasions, few studies
have examined the demographic history leading to admixture, how admixture
affects the heterozygosity and fitness of invasive genotypes, and whether
such fitness effects are maintained through time. We address these
questions using the invasive plant Silene vulgaris, which shows evidence
of admixture in both its native Europe and in North America where it has
invaded. Using multilocus genotype data in conjunction with approximate
Bayesian computation analysis of demographic history, we showed that
admixture during the invasion of North America was independent from and
much younger than admixture in the native range of Europe. We tested for
fitness consequences of admixture in each range and detected a significant
positive heterozygosity–fitness correlation (HFC) in North America; in
contrast, no HFC was present in Europe. The lack of HFC in Europe may
reflect the longer time since admixture in the native range, dissipating
associations between heterozygosity at markers and fitness loci. Our
results support a key short-term role for admixture during the early
stages of invasion by generating HFCs that carry populations past the
threat of extinction from inbreeding and demographic stochasticity.
heterozygosity-fitness data for Silene vulgarisThese data provide sampling
meta-data, genetic summary statistics (multi-locus heterozygosity and
STRUCTURE Q-scores), and common garden fitness data for 163 families of
Silene vulgaris collected from across Europe (native) and North America
(introduced)Keller_etal_JEB2014_HFC_DRYAD.xlsxMicrosatellite genotypes
from 15 loci for Silene vulgarisThese data are diploid microsatellite
genotypes, in units of allele size (bp), for 15 co-dominant loci. Data are
formatted as an input file for STRUCTURE, with missing values are coded as
'-9'.Keller_etal_JEB2014_MICROSATS_STR.txtGenotype data for
DIYABC analysis of demographic history for Silene vulgarisThese data
provide sampling meta-data, microsatellite genotypes, and input file
formatting for the DIYABC approximate Bayesian computation analysis. Two
sheets are provided: sheet "data, K=2" provides the genotype
data and accompanying metadata used to produce the input file for DIYABC;
sheet "forDIYABC" provides the formatted input file for the
DIYABC analysisKeller_etal_JEB2014_DIYABC_DRYAD.xlsxDIYABC reftable.header
for ABC demographic analysis in Silene vulgarisThis file contains the
metadata necessary to run approximate Bayesian computation in DIYABC for 2
historical demographic scenarios in Silene
vulgaris.Keller_etal_JEB2014_DIYABC_reftable.header
Europe
North America