CHLOROPLAST SHARING IN THE TASMANIAN EUCALYPTS

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 sha...

Full description

Saved in:
Bibliographic Details
Published in:Evolution 2001-04, Vol.55 (4), p.703-711
Main Authors: McKinnon, Gay E, Vaillancourt, René E, Jackson, Hamish D, Potts, Bradley M
Format: Article
Language:English
Subjects:
Alpine glaciers
Base Sequence
Biological taxonomies
Chloroplast
Chloroplast DNA
Chloroplasts
Chloroplasts - genetics
Deoxyribonucleic acid
DNA
DNA, Chloroplast - genetics
Eucalyptus
Eucalyptus - genetics
Evolution
Evolution, Molecular
Flowers & plants
Genetic hybridization
Genetic Variation
Genetics
Geographic regions
glacial refugia
Haplotypes
hybridization
introgression
JLA region
Molecular Sequence Data
Plant Leaves - chemistry
Plant Leaves - genetics
Plants, Medicinal
Polymerase Chain Reaction
Polymorphism, Genetic - genetics
REGULAR ARTICLES
reticulate evolution
Sequence Analysis, DNA
Symphyomyrtus
Tasmania
Vegetation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. Corresponding Editor: O. Savolainen
ISSN:0014-3820
1558-5646
DOI:10.1554/0014-3820(2001)055[0703:CSITTE]2.0.CO;2