Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum
We examined sequence variation of ITS and phy2 for Bryum argenteum from Antarctica, sub-Antarctic, New Zealand and Australia to understand better taxonomic delimitations and resolve relationships between these geographic regions. Bryum argenteum has been recorded as two species, B. argenteum and B....
Published in: | Antarctic Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge Univ Press
2010
|
Subjects: | |
Online Access: | http://hdl.handle.net/2440/62685 https://doi.org/10.1017/S0954102010000453 |
id |
ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/62685 |
---|---|
record_format |
openpolar |
spelling |
ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/62685 2023-12-17T10:22:04+01:00 Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum Hills, S. Stevens, M. Gemmill, C. 2010 http://hdl.handle.net/2440/62685 https://doi.org/10.1017/S0954102010000453 en eng Cambridge Univ Press Antarctic Science, 2010; 22(7 Sp Iss):721-726 0954-1020 1365-2079 http://hdl.handle.net/2440/62685 doi:10.1017/S0954102010000453 Stevens, M. [0000-0003-1505-1639] Copyright © Antarctic Science Ltd 2010 bryophytes genetic variation ITS phy2 Victoria Land Journal article 2010 ftunivadelaidedl https://doi.org/10.1017/S0954102010000453 2023-11-20T23:28:54Z We examined sequence variation of ITS and phy2 for Bryum argenteum from Antarctica, sub-Antarctic, New Zealand and Australia to understand better taxonomic delimitations and resolve relationships between these geographic regions. Bryum argenteum has been recorded as two species, B. argenteum and B. subrotundifolium, in all four regions with the latter now referred to as B. argenteum var. muticum. We found disagreement between taxon delimitations (based on morphology) and molecular markers. All continental Antarctic specimens consistently formed a monophyletic sister group that consisted of both morphologically identified B. argenteum varieties, separate to all non-Antarctic specimens (also consisting of both varieties). We suggest, contrary to previous records, that all continental Antarctic (Victoria Land) populations are referable to B. argenteum var. muticum, while sub-Antarctic, Australian and New Zealand populations included here are B. argenteum var. argenteum. Additionally, since there was less genetic diversity within Victoria Land, Antarctica, than observed between non-Antarctic samples, we suggest that this is, in part, due to a potentially lower rate of DNA substitution and isolation in northern and southern refugia within Victoria Land since the Pleistocene. Simon F. K. Hills, Mark I. Stevens and Chrissen E. C. Gemmill Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica Victoria Land The University of Adelaide: Digital Library Antarctic New Zealand Victoria Land Antarctic Science 22 6 721 726 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
bryophytes genetic variation ITS phy2 Victoria Land |
spellingShingle |
bryophytes genetic variation ITS phy2 Victoria Land Hills, S. Stevens, M. Gemmill, C. Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum |
topic_facet |
bryophytes genetic variation ITS phy2 Victoria Land |
description |
We examined sequence variation of ITS and phy2 for Bryum argenteum from Antarctica, sub-Antarctic, New Zealand and Australia to understand better taxonomic delimitations and resolve relationships between these geographic regions. Bryum argenteum has been recorded as two species, B. argenteum and B. subrotundifolium, in all four regions with the latter now referred to as B. argenteum var. muticum. We found disagreement between taxon delimitations (based on morphology) and molecular markers. All continental Antarctic specimens consistently formed a monophyletic sister group that consisted of both morphologically identified B. argenteum varieties, separate to all non-Antarctic specimens (also consisting of both varieties). We suggest, contrary to previous records, that all continental Antarctic (Victoria Land) populations are referable to B. argenteum var. muticum, while sub-Antarctic, Australian and New Zealand populations included here are B. argenteum var. argenteum. Additionally, since there was less genetic diversity within Victoria Land, Antarctica, than observed between non-Antarctic samples, we suggest that this is, in part, due to a potentially lower rate of DNA substitution and isolation in northern and southern refugia within Victoria Land since the Pleistocene. Simon F. K. Hills, Mark I. Stevens and Chrissen E. C. Gemmill |
format |
Article in Journal/Newspaper |
author |
Hills, S. Stevens, M. Gemmill, C. |
author_facet |
Hills, S. Stevens, M. Gemmill, C. |
author_sort |
Hills, S. |
title |
Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum |
title_short |
Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum |
title_full |
Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum |
title_fullStr |
Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum |
title_full_unstemmed |
Molecular support for Pleistocene persistence of the continental Antarctic moss Bryum argenteum |
title_sort |
molecular support for pleistocene persistence of the continental antarctic moss bryum argenteum |
publisher |
Cambridge Univ Press |
publishDate |
2010 |
url |
http://hdl.handle.net/2440/62685 https://doi.org/10.1017/S0954102010000453 |
geographic |
Antarctic New Zealand Victoria Land |
geographic_facet |
Antarctic New Zealand Victoria Land |
genre |
Antarc* Antarctic Antarctic Science Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Victoria Land |
op_relation |
Antarctic Science, 2010; 22(7 Sp Iss):721-726 0954-1020 1365-2079 http://hdl.handle.net/2440/62685 doi:10.1017/S0954102010000453 Stevens, M. [0000-0003-1505-1639] |
op_rights |
Copyright © Antarctic Science Ltd 2010 |
op_doi |
https://doi.org/10.1017/S0954102010000453 |
container_title |
Antarctic Science |
container_volume |
22 |
container_issue |
6 |
container_start_page |
721 |
op_container_end_page |
726 |
_version_ |
1785542819829514240 |