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Investigation of species boundaries and relationships in the Asplenium paleaceum complex (Aspleniaceae) using AFLP fingerprinting and chloroplast and nuclear DNA sequences

Investigation of species boundaries and relationships in the Asplenium paleaceum complex... Species boundaries and relationships were investigated in the Asplenium paleaceum (Aspleniaceae) species complex from eastern Australia, using AFLP fingerprinting and chloroplast trnLtrnF and rps4trnS and nuclear pgiC DNA sequences. Phenetic analyses of AFLP data resulted in the following five distinct groups: (1) A. carnarvonense, (2) A. bicentenniale (including nearby collections originally identified as A. paleaceum), (3) A. paleaceum with both aborted and normal spores, (4) one population of putative tetraploid A. attenuatum var. indivisum from south Queensland, and (5) remaining octoploid A. attenuatum populations and several putative hybrids. Taxonomic revision of this complex will require morphological re-circumscription of the current species and recognition of a new species if these AFLP groups are taken to represent separate species. The chloroplast regions, morphology and pgiC together provide good evidence that an Asplenium of unconfirmed identity, A. sp. Kroombit Tops, is an allopolyploid with a species of the A. paleaceum chloroplast clade, probably A. paleaceum, and distantly related A. polyodon as parents. Further study is required to determine the complete ancestry of the other species of the A. paleaceum complex. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Systematic Botany CSIRO Publishing

Investigation of species boundaries and relationships in the Asplenium paleaceum complex (Aspleniaceae) using AFLP fingerprinting and chloroplast and nuclear DNA sequences

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Publisher
CSIRO Publishing
Copyright
Copyright © The Author(s). Published by CSIRO Publishing
ISSN
1030-1887
eISSN
1446-4701
DOI
10.1071/SB14024
Publisher site
See Article on Publisher Site

Abstract

Species boundaries and relationships were investigated in the Asplenium paleaceum (Aspleniaceae) species complex from eastern Australia, using AFLP fingerprinting and chloroplast trnLtrnF and rps4trnS and nuclear pgiC DNA sequences. Phenetic analyses of AFLP data resulted in the following five distinct groups: (1) A. carnarvonense, (2) A. bicentenniale (including nearby collections originally identified as A. paleaceum), (3) A. paleaceum with both aborted and normal spores, (4) one population of putative tetraploid A. attenuatum var. indivisum from south Queensland, and (5) remaining octoploid A. attenuatum populations and several putative hybrids. Taxonomic revision of this complex will require morphological re-circumscription of the current species and recognition of a new species if these AFLP groups are taken to represent separate species. The chloroplast regions, morphology and pgiC together provide good evidence that an Asplenium of unconfirmed identity, A. sp. Kroombit Tops, is an allopolyploid with a species of the A. paleaceum chloroplast clade, probably A. paleaceum, and distantly related A. polyodon as parents. Further study is required to determine the complete ancestry of the other species of the A. paleaceum complex.

Journal

Australian Systematic Botany – CSIRO Publishing

Published: Jun 29, 2015

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