10.5061/DRYAD.T7R6KG5
Spriggs, Elizabeth L.
Yale University
Schlutius, Caroline
Yale University
Eaton, Deren A.
Columbia University
Park, Brian
Yale University
Sweeney, Patrick W.
Yale University
Edwards, Erika J.
Yale University
Donoghue, Michael J.
Yale University
Data from: Differences in flowering time maintain species boundaries in a
continental radiation of Viburnum
Dryad
dataset
2019
flowering
Viburnum
National Science Foundation
https://ror.org/021nxhr62
IOS-1256706, IOS-1257262, DGE-1122492, 1501188
2019-05-28T15:49:46Z
2019-05-28T15:49:46Z
en
https://doi.org/10.1002/ajb2.1292
595531230 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Premise of the study: We take an integrative approach in assessing how
introgression and Pleistocene climate fluctuations have shaped the
diversification of the Viburnum lentago clade, a group of five
inter-fertile species with broad areas of sympatry. We specifically tested
whether flowering time plays a role in maintaining species isolation.
Methods: RAD-seq data for 103 individuals were used to infer the species
relationships and the genetic structure within each species. Flowering
times were compared among species based on historical flowering dates
documented in herbarium specimens. Key Results: Within each species we
found a strong relationship between flowering date and latitude, such that
southern populations flower earlier than northern ones. In areas of
sympatry, the species flower in sequence rather than simultaneously, with
flowering dates offset by at least nine days for all species pairs. In two
cases it appears that the offset in flowering times is an incidental
consequence of adaptation to differing climates, but in the recently
diverged sister species V. prunifolium and V. rufidulum, we find evidence
that reinforcement led to reproductive character displacement. Long-term
trends suggest that the two northern-most species are flowering earlier in
response to recent climate change. Conclusions: We argue that speciation
in the Lentago clade has primarily occurred through ecological divergence
of allopatric populations, but differences in flowering time were
essential to maintain separation of incipient species when they came into
secondary contact. This combination of factors may underlie
diversification in many other plant clades.
lentago_collections_tableTable with individuals collected for this study.
The state and county are listed for each individualPhenology_dataTable of
phenology data collected from herbarium specimens. This file contains
information on ther Herbarium, species, collector, collection number,
locality, date, and phenological stage. In this file the phenology is
scored: 0 = leaves, small flower buds, 1 = flower buds with expanded
inflorescences, 2 = flowering, 3 = past flowering, small fruits visible, 4
= young fruits, 5 = mature fruits, 6 = fruits fallen off, 7 = no leaves or
fruits (winter), NA = infertile.core_lentago-c88-d6-min24_outfilesAll
ipyrad outfiles for the entire V. lentago clade + outgroups with all loci
shared across at least 24
individuals.core_lentago-c88-d6-min49_outfilesAll ipyrad outfiles for the
entire V. lentago clade + outgroups with all loci shared across at least
49 individuals.core_lentago-c88-d6-min73_outfilesAll ipyrad outfiles for
the entire V. lentago clade + outgroups with all loci shared across at
least 73 individuals.core_lentago_combined_floral_trait_dataMorphological
trait data for the core Lentago
species.cleaned_occurrences_lentago_cladeTable of occurrence information
compiled from multiple sources and cleaned according to the processes
described in our manuscript.