Show simple item record

dc.contributor.authorHirsch, H.
dc.contributor.authorRichardson, D.M.
dc.contributor.authorImpson, F.A.C.
dc.contributor.authorKleinjan, C.
dc.contributor.authorLe Roux, J.J.
dc.date.accessioned2018-08-03T11:17:53Z
dc.date.available2018-08-03T11:17:53Z
dc.date.issued2018
dc.identifier.citationHirsch, H.; Richardson, D.M.; Impson, F.A.C.; Kleinjan, C.; Le Roux, J.J. (2018) Historical range contraction, and not taxonomy, explains the contemporary genetic structure of the Australian tree, Acacia dealbata Link. Tree Genetics & Genomes, 14: 49en_ZA
dc.identifier.issn1614-2942en_ZA
dc.identifier.urihttp://hdl.handle.net/123456789/2484
dc.description.abstractIrrespective of its causes, strong population genetic structure indicates a lack of gene flow. Understanding the processes that underlie such structure, and the spatial patterns it causes, is valuable for conservation efforts such as restoration. On the other hand, when a species is invasive outside its native range, such information can aid management in the non-native range. Here we explored the genetic characteristics of the Australian tree Acacia dealbata in its native range. Two subspecies of A. dealbata have previously been described based on morphology and environmental requirements, but recent phylogeographic data raised questions regarding the validity of this taxonomic subdivision. The species has been widely planted within and outside its native Australian range and is also a highly successful invasive species in many parts of the world.We employed microsatellite markers to investigate the population genetic diversity and structure among 42 A. dealbata populations from across the species’ native range. We also tested whether environmental variables purportedly relevant for the putative separation of subspecies are linked with population genetic differentiation.We found no relationship between population genetic structure of A. dealbata in Australia and these environmental features. Rather, we identified two geographically distinct genetic clusters that corresponded with populations in the northeastern part of mainland Australia, and the southern mainland and Tasmanian range of the species. Our results do not support the taxonomic subdivision of the species into two distinct subspecies based on environmental features. We therefore assume that the observed morphological differences between the putative subspecies are plastic phenotypic responses. This study provides population genetic information that will be useful for the conservation of the species within Australia as well as to better understand the invasion dynamics of A. dealbata.en_ZA
dc.language.isoenen_ZA
dc.publisherSpringeren_ZA
dc.subjectBiological invasionsen_ZA
dc.subjectFabaceaeen_ZA
dc.subjectGenetic diversity and structureen_ZA
dc.subjectMicrosatellitesen_ZA
dc.subjectTree invasionsen_ZA
dc.titleHistorical range contraction, and not taxonomy, explains the contemporary genetic structure of the Australian tree, Acacia dealbata Linken_ZA
dc.typeJournalArticlesen_ZA
dc.cibjournalTree Genetics & Genomesen_ZA
dc.cibprojectNAen_ZA


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record