10.5061/DRYAD.5DH5F
Whitney, Kenneth D.
University of New Mexico
Broman, Karl W.
University of Wisconsin-Madison
Kane, Nolan C.
University of Colorado Boulder
Hovick, Stephen M.
The Ohio State University
Randell, Rebecca A.
Indiana University Bloomington
Rieseberg, Loren H.
Indiana University Bloomington
University of British Columbia
Data from: QTL mapping identifies candidate alleles involved in adaptive
introgression and range expansion in a wild sunflower
Dryad
dataset
2014
Helianthus debilis
Isophrictis
Helianthus
Helianthus annuus texanus
adaptive trait introgression
seed predation
Neolasioptera
quantitative trait locus
plant architecture
Holocene
2014-12-16T19:45:49Z
2014-12-16T19:45:49Z
en
https://doi.org/10.1111/mec.13044
878757 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
The wild North American sunflowers Helianthus annuus and H. debilis are
participants in one of the earliest identified examples of adaptive trait
introgression, and the exchange is hypothesized to have triggered a range
expansion in H. annuus. However, the genetic basis of the adaptive
exchange has not been examined. Here, we combine quantitative trait locus
(QTL) mapping with field measurements of fitness to identify candidate H.
debilis QTL alleles likely to have introgressed into H. annuus to form the
natural hybrid lineage H. a. texanus. Two 500-individual BC1 mapping
populations were grown in central Texas, genotyped for 384 single
nucleotide polymorphism (SNP) markers and then phenotyped in the field for
two fitness and 22 herbivore resistance, ecophysiological, phenological
and architectural traits. We identified a total of 110 QTL, including at
least one QTL for 22 of the 24 traits. Over 75% of traits exhibited at
least one H. debilis QTL allele that would shift the trait in the
direction of the wild hybrid H. a. texanus. We identified three
chromosomal regions where H. debilis alleles increased both female and
male components of fitness; these regions are expected to be strongly
favoured in the wild. QTL for a number of other ecophysiological,
phenological and architectural traits colocalized with these three regions
and are candidates for the actual traits driving adaptive shifts. G × E
interactions played a modest role, with 17% of the QTL showing potentially
divergent phenotypic effects between the two field sites. The candidate
adaptive chromosomal regions identified here serve as explicit hypotheses
for how the genetic architecture of the hybrid lineage came into
existence.
Phenotype and SNP Genotype DataThis Excel file contains information on 906
field-grown backcross1 sunflower plants. Field site is identified in
column Z. Plants are identified by the number in column AA. Columns A-Y
contain field-measured trait data. Trait names correspond to the
abbreviations in Table 1 of the associated manuscript. Columns AH - HO
contain SNP genotype data; A = H. a. annuus allele; D = H. debilis
allele.Whitney phenotype genotype data.xlsxLinkage MapThis Excel file
contains the estimated linkage map for the H. a. annuus x H. debilis
backcross1 mapping populations. The position of each marker on the linkage
group is given in centiMorgans (cM).Whitney linkage map.xlsx
Texas
North America