High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus
Abstract Previous work focused on allozymes and mitochondrial haplotypes has detected high levels of genetic variability between Cryptopygus terranovus populations, a springtail species endemic to Antarctica, until recently named Gressittacantha terranova . This study expands these biogeographical s...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/s0954102016000730 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102016000730 |
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crcambridgeupr:10.1017/s0954102016000730 2024-10-06T13:42:15+00:00 High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus Carapelli, Antonio Leo, Chiara Frati, Francesco 2017 http://dx.doi.org/10.1017/s0954102016000730 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102016000730 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 29, issue 4, page 311-323 ISSN 0954-1020 1365-2079 journal-article 2017 crcambridgeupr https://doi.org/10.1017/s0954102016000730 2024-09-11T04:05:17Z Abstract Previous work focused on allozymes and mitochondrial haplotypes has detected high levels of genetic variability between Cryptopygus terranovus populations, a springtail species endemic to Antarctica, until recently named Gressittacantha terranova . This study expands these biogeographical surveys using additional analytical techniques, providing a denser haplotype dataset and a wider sampling of localities. Specimens were collected from 11 sites across Victoria Land and sequenced for the cytochrome c oxidase subunit I mitochondrial gene ( cox1 ). Haplotypes were used for population genetics, demographic, molecular clock and Bayesian phylogenetic analyses. Landscape distribution and clustering of haplotypes were also examined for the first time in this species. Only three (out of 67) haplotypes are shared among populations, suggesting high genetic structure and limited gene flow between sites. As in previous studies, the population of Apostrophe Island has a closer genetic similarity with those of the central sites, rather than with its neighbours. Molecular clock estimates point to early differentiation of haplotypes in the late/mid-Miocene, also supporting the view that C. terranovus is a relict species that survived on the Antarctic continent during the Last Glacial Maximum. The present genetic composition of populations represents a mixture of ancient and more recent haplotypes, sometimes occurring in the same localities. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctic Springtail Antarctica Terranova Victoria Land Springtail Cambridge University Press Antarctic Apostrophe Island ENVELOPE(167.433,167.433,-73.517,-73.517) The Antarctic Victoria Land Antarctic Science 29 4 311 323 |
institution |
Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Previous work focused on allozymes and mitochondrial haplotypes has detected high levels of genetic variability between Cryptopygus terranovus populations, a springtail species endemic to Antarctica, until recently named Gressittacantha terranova . This study expands these biogeographical surveys using additional analytical techniques, providing a denser haplotype dataset and a wider sampling of localities. Specimens were collected from 11 sites across Victoria Land and sequenced for the cytochrome c oxidase subunit I mitochondrial gene ( cox1 ). Haplotypes were used for population genetics, demographic, molecular clock and Bayesian phylogenetic analyses. Landscape distribution and clustering of haplotypes were also examined for the first time in this species. Only three (out of 67) haplotypes are shared among populations, suggesting high genetic structure and limited gene flow between sites. As in previous studies, the population of Apostrophe Island has a closer genetic similarity with those of the central sites, rather than with its neighbours. Molecular clock estimates point to early differentiation of haplotypes in the late/mid-Miocene, also supporting the view that C. terranovus is a relict species that survived on the Antarctic continent during the Last Glacial Maximum. The present genetic composition of populations represents a mixture of ancient and more recent haplotypes, sometimes occurring in the same localities. |
format |
Article in Journal/Newspaper |
author |
Carapelli, Antonio Leo, Chiara Frati, Francesco |
spellingShingle |
Carapelli, Antonio Leo, Chiara Frati, Francesco High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus |
author_facet |
Carapelli, Antonio Leo, Chiara Frati, Francesco |
author_sort |
Carapelli, Antonio |
title |
High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus |
title_short |
High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus |
title_full |
High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus |
title_fullStr |
High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus |
title_full_unstemmed |
High levels of genetic structuring in the Antarctic springtail Cryptopygus terranovus |
title_sort |
high levels of genetic structuring in the antarctic springtail cryptopygus terranovus |
publisher |
Cambridge University Press (CUP) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1017/s0954102016000730 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102016000730 |
long_lat |
ENVELOPE(167.433,167.433,-73.517,-73.517) |
geographic |
Antarctic Apostrophe Island The Antarctic Victoria Land |
geographic_facet |
Antarctic Apostrophe Island The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctic Science Antarctic Springtail Antarctica Terranova Victoria Land Springtail |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctic Springtail Antarctica Terranova Victoria Land Springtail |
op_source |
Antarctic Science volume 29, issue 4, page 311-323 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102016000730 |
container_title |
Antarctic Science |
container_volume |
29 |
container_issue |
4 |
container_start_page |
311 |
op_container_end_page |
323 |
_version_ |
1812174671421898752 |