What does population structure analysis reveal about the Pterostylis longifolia complex (Orchidaceae)?

J K Janes; Dorothy A Steane; R E Vaillancourt

doi:10.1002/ece3.376

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What does population structure analysis reveal about the Pterostylis longifolia complex (Orchidaceae)?

Journal article

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What does population structure analysis reveal about the Pterostylis longifolia complex (Orchidaceae)?

J K Janes, Dorothy A Steane and R E Vaillancourt

Ecology and Evolution, Vol.2(11), pp.2631-2644

2012

DOI: https://doi.org/10.1002/ece3.376

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Abstract

Ecology

Plant Biology

AFLP

conservation

hybridization

refugia

speciation

taxonomy

Morphologically similar groups of species are common and pose significant challenges for taxonomists. Differences in approaches to classifying unique species can result in some species being overlooked, whereas others are wrongly conserved. The genetic diversity and population structure of the Pterostylis longifolia complex (Orchidaceae) in Tasmania was investigated to determine if four species, and potential hybrids, could be distinguished through genomic AFLP and chloroplast restriction-fragment-length polymorphism (RFLP) markers. Analysis of molecular variance (AMOVA) results indicated that little genetic variation was present among taxa, whereas PCoA analyses revealed genetic variation at a regional scale irrespective of taxa. Population genetic structure analyses identified three clusters that correspond to regional genetic and single taxon-specific phenotypic variation. The results from this study suggest that "longifolia" species have persisted throughout the last glacial maximum in Tasmania and that the complex may be best treated as a single taxon with several morphotypes. These results could have serious evolutionary and conservation implications as taxonomic changes could result in the instatement of a single, widespread taxon in which rarer morphotypes are not protected.

Details

Title: What does population structure analysis reveal about the Pterostylis longifolia complex (Orchidaceae)?
Authors: J K Janes (Author) - University of Tasmania
Dorothy A Steane (Author) - University of Tasmania
R E Vaillancourt (Author) - University of Tasmania
Publication details: Ecology and Evolution, Vol.2(11), pp.2631-2644
Publisher: John Wiley & Sons Ltd.
Date published: 2012
DOI: 10.1002/ece3.376
ISSN: 2045-7758
Copyright note: Copyright © 2012 The Authors. Published by Blackwell Publishing Ltd. This is an Open Access article under the terms of the Creative Commons Attribution Non Commercial License which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450131902621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Ecology; Evolutionary Biology