10.5061/DRYAD.GD8GP17
Rutherford, Susan
Environmental Earth Sciences
Rossetto, Maurizio
Royal Botanic Garden Sydney
Bragg, Jason G.
Royal Botanic Garden Sydney
McPherson, Hannah
Royal Botanic Garden Sydney
Benson, Doug
Royal Botanic Garden Sydney
Bonser, Stephen P.
Environmental Earth Sciences
Wilson, Peter G.
Royal Botanic Garden Sydney
Data from: Speciation in the presence of gene flow: population genomics of
closely related and diverging Eucalyptus species
Dryad
dataset
2018
Eucalyptus dendromorpha
Eucalyptus stricta
Diversity Arrays Technology (DArTseq)
Eucalyptus cunninghamii
Eucalyptus laophila
Eucalyptus obstans
Eucalyptus langleyi
2018-03-14T15:48:50Z
2018-03-14T15:48:50Z
en
https://doi.org/10.1038/s41437-018-0073-2
249238613 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Speciation is a complex process that is fundamental to the origins of
biological diversity. While there has been considerable progress in our
understanding of speciation, there are still many unanswered questions,
especially regarding barriers to gene flow in diverging populations.
Eucalyptus is an appropriate system for investigating speciation
mechanisms since it comprises species that are rapidly evolving across
heterogeneous environments. We examined patterns of genetic variation
within and among six closely related Eucalyptus species in subgenus
Eucalyptus section Eucalyptus in south-eastern Australia (commonly known
as the ‘green ashes’). We used reduced representation genome sequencing to
genotype samples from populations across altitudinal and latitudinal
gradients. We found one species, Eucalyptus cunninghamii, to be highly
genetically differentiated from the others, and a population of mallees
from Mount Banks to be genetically distinct and therefore likely to be a
new undescribed species. Only modest levels of differentiation were found
between all other species in the study. There was population structure
within some species (e.g. E. obstans) corresponding to geographical
factors, indicating that vicariance may have played a role in the
evolution of the group. Overall, we found that lineages within the green
ashes are differentiated to varying extents, from strongly diverged to
much earlier stages of the speciation continuum. Furthermore, our results
suggest the green ashes represent a group where a range of mechanisms
(e.g. reticulate evolution and vicariance) have been operating in concert.
These findings not only offer insights into recent speciation mechanisms
in Eucalyptus, but also other species complexes.
Speciation in the presence of gene flow_DArTseq_Report-DE15-1659DArTseq
analysis of six Eucalyptus species from south-eastern Australia. The file
comprises two datasets: Silico DArTs (presence/absence markers) and SNPs.
The SNPs are presented in both single line format and two line
format.Speciation in the presence of gene flow data_Report-DE15-1659.xlsx
South-eastern Australia