10.5061/DRYAD.76T6J77
Rutherford, Susan
Royal Botanic Garden Sydney
van der Merwe, Marlien
Royal Botanic Garden Sydney
Wilson, Peter G.
Royal Botanic Garden Sydney
Kooyman, Robert M.
Royal Botanic Garden Sydney
Rossetto, Maurizio
Royal Botanic Garden Sydney
Data from: Managing the risk of genetic swamping of a rare and restricted tree
Dryad
dataset
2019
Eucalyptus tetrapleura
Diversity Arrays Technology (DArTseq)
2019-06-10T13:15:18Z
2019-06-10T13:15:18Z
en
https://doi.org/10.1007/s10592-019-01201-4
33006477 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Hybridisation is a complex process that has important evolutionary
consequences. In the case of rare species, a comprehensive understanding
of inter-specific hybridisation can be critical for their conservation and
management. Eucalyptus tetrapleura is a rare species of ironbark that is
restricted to a 40 km × 100 km area around Grafton on the North Coast of
New South Wales (Australia), and is distinctive in that it has four ribs
on the sides of its buds and fruits. In recent years, central populations
of E. tetrapleura have been cleared to facilitate upgrades to one of the
major highways in eastern Australia. This has led to increased habitat
fragmentation, and there are now concerns that the species is at risk of
genetic swamping by more common ironbark relatives. In this study, we
investigated the population genetics and patterns of gene flow in E.
tetrapleura. We used DArTseq to genotype samples collected from across the
known distribution of E. tetrapleura, as well as leaf material collected
from co-occurring ironbark species. We found that while E. tetrapleura was
a distinct evolutionary lineage, there was evidence of gene flow between
this species and other ironbarks. Furthermore, many populations that had
been identified as E. tetrapleura on the basis of morphology were of
hybrid origin, thus the range of the species was much smaller than
previously thought. Overall, our findings demonstrate how genomic methods
can improve our understanding of admixture across closely related
lineages, which can be used to inform the restoration of rare species.
Eucalyptus tetrapleura _DArTseq_Report_DE16-2415_raw data
South-eastern Australia