10.5061/DRYAD.C9Q92
McLeod, Kylie A.
University of British Columbia
Scascitelli, Moira
University of British Columbia
Vellend, Mark
University of British Columbia
Data from: Detecting small-scale genotype-environment interactions in
apomictic dandelion (Taraxacum officinale) populations
Dryad
dataset
2012
Weed
Taraxacum officinale
Apomictic
Dandelion
2012-06-18T15:32:12Z
2012-06-18T15:32:12Z
en
https://doi.org/10.1111/j.1420-9101.2012.02549.x
18244 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Studies of genotype × environment interactions (G×E) and local adaptation
provide critical tests of natural selection’s ability to counter opposing
forces such as gene flow. Such studies may be greatly facilitated in
asexual species, given the possibility for experimental replication at the
level of true genotypes (rather than populations) and the possibility of
using molecular markers to assess genotype-environment associations in the
field (neither of which is possible for most sexual species). Here we
tested for G×E in asexual dandelions (Taraxacum officinale) by subjecting
six genotypes to experimental drought, mown, and benign (control)
conditions, and subsequently using microsatellites to assess
genotype-environment associations in the field. We found strong G×E, with
genotypes that performed poorly under benign conditions showing the
highest performance under stressful conditions (drought or mown). Our six
focal genotypes comprise >80% of plants in local populations. The
most common genotype in the field showed its highest relative performance
under mown conditions (the most common habitat in our study area), and
almost all plants of this genotype in the field were found growing in
mowed lawns. Genotypes performing best under benign experimental
conditions were found most frequently in unmown conditions in the field.
These results are strongly indicative of local adaptation at a very small
scale, with unmown microsites of only a few square meters typically
embedded within larger mown lawns. By studying an asexual species we were
able to map genotypes with known ecological characteristics to
environments with high spatial precision.
Results of Taraxacum officinale genotyping and Genotype by Environment
field experimentRecord of T. officinale genotypes identified in sampling
of Vancouver populations. Results of T. officinale Genotype by Environment
(GxE) field experiment conducted at Totem Field, University of British
Columbia, Vancouver, B.C., Canada. GxE results include leaf area of the
control treatment at 5 and 8 weeks, root and total biomass of the mow
treatment, and number of days to partial and full wilting of the drought
treatment.McLeod_etal_DRYAD_data.xlsx
Canada
Vancouver
British Columbia