Molecular genetic diversity and population structure in Eucalyptus pauciflora subsp. pauciflora (Myrtaceae) on the island of Tasmania

A Gauli; Dorothy A Steane; R E Vaillancourt; Brad M Potts

doi:10.1071/BT14036

Back

Molecular genetic diversity and population structure in Eucalyptus pauciflora subsp. pauciflora (Myrtaceae) on the island of Tasmania

Journal article

Peer reviewed

Molecular genetic diversity and population structure in Eucalyptus pauciflora subsp. pauciflora (Myrtaceae) on the island of Tasmania

A Gauli, Dorothy A Steane, R E Vaillancourt and Brad M Potts

Australian Journal of Botany, Vol.62(3), pp.175-188

2014

DOI: https://doi.org/10.1071/BT14036

Files and links (1)

url

https://doi.org/10.1071/BT14036View

Published Version

Abstract

Eucalyptus pauciflora

genetic diversity

haplotypes

molecular markers

spatial structure

Genetic diversity and population structure of Tasmanian populations of Eucalyptus pauciflora were assessed using chloroplast and nuclear microsatellite markers. Maternal trees and open-pollinated progeny from 37 populations were sampled across the species' geographic and altitudinal distribution in Tasmania. The distribution of chloroplast haplotype richness showed a clear geographic structure with suggestion of three major refugia (Storm Bay, Tamar Valley and St Pauls River Valley), two of which are consistent with previously reported glacial refugia. Chloroplast haplotype affinities provided evidence of migration of populations from the north and east towards the south and west of Tasmania. High nuclear microsatellite diversity was observed across the species' range. Most of this variation was distributed within populations with low but significant FST, suggesting high gene flow among populations that is more pronounced in mature stands. Higher nuclear genetic diversity in newly colonised areas compared with lowland putative refugial regions, and the converse in chloroplast DNA markers, suggest limited seed dispersal into newly colonised regions combined with high pollen flow between different source populations in newly colonised areas. Our results do not support the suggestion that highland populations of E. pauciflora originate from in situ high-altitude refugia, but instead argue they originate from lowland refugia.

Details

Title: Molecular genetic diversity and population structure in Eucalyptus pauciflora subsp. pauciflora (Myrtaceae) on the island of Tasmania
Authors: A Gauli (Author) - University of Tasmania
Dorothy A Steane (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
R E Vaillancourt (Author) - University of Tasmania
Brad M Potts (Author) - University of Tasmania
Publication details: Australian Journal of Botany, Vol.62(3), pp.175-188
Publisher: C S I R O Publishing
Date published: 2014
DOI: 10.1071/BT14036
ISSN: 0067-1924
Grants: Devising ecologically sustainable restoration programs for degraded rural landscapes by integrating landscape ecology, genetics and ecophysiology, LP0991026, Australian Research Council (Australia, Canberra) - ARC
Providing a genetic framework to enhance the success and benefits from forest restoration and carbon plantings in rural landscapes, LP120200380, Australian Research Council (Australia, Canberra) - ARC
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99448783902621
Output Type: Journal article

Metrics

12 File views/ downloads

572 Record Views

19 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration
Web Of Science research areas: Plant Sciences