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Chloroplast sharing in the Tasmanian Eucalypts


McKinnon, GE and Vaillancourt, RE and Jackson, HD and Potts, BM, Chloroplast sharing in the Tasmanian Eucalypts, Evolution, 55, (4) pp. 703-711. ISSN 0014-3820 (2001) [Refereed Article]

DOI: doi:10.1554/0014-3820(2001)055[0703:CSITTE]2.0.CO;2


The biogeographic pattern of chloroplast DNA (cpDNA) haplotypes in Eucalyptus on the island of Tasmania is consistent with reticulate evolution, involving at least 12 Tasmanian species from the subgenus Symphyomyrtus. Intraspecific cpDNA polymorphism in 14 of 17 species is coupled with extensive sharing of identical haplotypes across populations of different species in the same geographic area. Haplotype diversity is lowest in central regions of Tasmania formerly occupied by alpine vegetation during glacial intervals and in northern regions that were periodically linked to continental Australia by land bridges. The observed distribution of several cpDNA haplotypes unique to Tasmania coincides with modeled locations of glacial refugia in coastal areas of Tasmania and shows the power of cpDNA in unraveling the complex history of past distributions of Eucalyptus. The results suggest that the model of evolution of the eucalypts should be reassessed to allow for the anastomosing effects of interspecific hybridization and introgression.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Evolutionary biology
Research Field:Plant and fungus systematics and taxonomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:McKinnon, GE (Dr Gay McKinnon)
UTAS Author:Vaillancourt, RE (Professor Rene Vaillancourt)
UTAS Author:Jackson, HD (Mr Hamish Jackson)
UTAS Author:Potts, BM (Professor Brad Potts)
ID Code:23091
Year Published:2001
Web of Science® Times Cited:104
Deposited By:Plant Science
Deposited On:2001-08-01
Last Modified:2009-07-31

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