Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia
Bryophytes are a major component of vegetation in ice-free coastal regions of Antarctica. Sanionia uncinata (Hedw.) Loeske is distributed from northern and central Maritime Antarctica to Marguerite Bay in the southern part of this biome where it occurs sparsely. Production of sporophytes is rare for...
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ftdoajarticles:oai:doaj.org/article:0777380478d643a6ba31c2fda4578a1d 2023-05-15T14:01:10+02:00 Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia Ingrid Hebel Maria Carmen Dacasa Rüdinger Ricardo A. Jaña Joaquin Bastias 2018-10-01T00:00:00Z https://doi.org/10.3389/fevo.2018.00152 https://doaj.org/article/0777380478d643a6ba31c2fda4578a1d EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fevo.2018.00152/full https://doaj.org/toc/2296-701X 2296-701X doi:10.3389/fevo.2018.00152 https://doaj.org/article/0777380478d643a6ba31c2fda4578a1d Frontiers in Ecology and Evolution, Vol 6 (2018) gametophytes ancestral origin genetic diversity fine-scale HYSPLIT Evolution QH359-425 Ecology QH540-549.5 article 2018 ftdoajarticles https://doi.org/10.3389/fevo.2018.00152 2022-12-31T12:22:25Z Bryophytes are a major component of vegetation in ice-free coastal regions of Antarctica. Sanionia uncinata (Hedw.) Loeske is distributed from northern and central Maritime Antarctica to Marguerite Bay in the southern part of this biome where it occurs sparsely. Production of sporophytes is rare for S. uncinata in Antarctica, thus a high level of genetic uniformity among populations is expected (Lewis Smith, 1984). Several ice advances and retreats events in last thousands of years in Patagonia and Antarctica could have driven different processes of speciation at fine scale or triggered genetic differentiation among populations, leading to unique genetic populations. A few studies have analyzed the genetic structure of mosses in Antarctica, but none in Maritime Antarctica or in the nearby zones such as southern Patagonia. Based on Amplified Fragment Length Polymorphism (AFLP) and grouping analysis, we determined levels of intra/and inter-population genetic diversity of S. uncinata in sites of this region. The results revealed that gene diversity within populations was low and that populations did not have significant genetic differentiation. Also, no correlation was found between genetic variability and geographic distance (R2 = 0.031). However, we distinguished two groups of populations. One of them clustered populations with low values of genetic diversity. The other one was made out of populations showing much higher genetic diversity. Cluster 1 was the most geographically widely distributed covering populations from northern part of southern Patagonia to southern part of studied populations in Maritime Antarctica. Cluster 2 had the highest level of polymorphism, but spatially is very restricted to four populations in the Maritime Antarctica and southern Patagonia. We found substructures in some populations of the Maritime Antarctica such as in the Coppermine, Byers and Suffield populations. The underlying causes of this subdivision could be the asexual reproduction and significant abiotic factor affecting ... Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Patagonia Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Suffield ENVELOPE(-58.919,-58.919,-62.194,-62.194) Frontiers in Ecology and Evolution 6 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
gametophytes ancestral origin genetic diversity fine-scale HYSPLIT Evolution QH359-425 Ecology QH540-549.5 |
spellingShingle |
gametophytes ancestral origin genetic diversity fine-scale HYSPLIT Evolution QH359-425 Ecology QH540-549.5 Ingrid Hebel Maria Carmen Dacasa Rüdinger Ricardo A. Jaña Joaquin Bastias Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia |
topic_facet |
gametophytes ancestral origin genetic diversity fine-scale HYSPLIT Evolution QH359-425 Ecology QH540-549.5 |
description |
Bryophytes are a major component of vegetation in ice-free coastal regions of Antarctica. Sanionia uncinata (Hedw.) Loeske is distributed from northern and central Maritime Antarctica to Marguerite Bay in the southern part of this biome where it occurs sparsely. Production of sporophytes is rare for S. uncinata in Antarctica, thus a high level of genetic uniformity among populations is expected (Lewis Smith, 1984). Several ice advances and retreats events in last thousands of years in Patagonia and Antarctica could have driven different processes of speciation at fine scale or triggered genetic differentiation among populations, leading to unique genetic populations. A few studies have analyzed the genetic structure of mosses in Antarctica, but none in Maritime Antarctica or in the nearby zones such as southern Patagonia. Based on Amplified Fragment Length Polymorphism (AFLP) and grouping analysis, we determined levels of intra/and inter-population genetic diversity of S. uncinata in sites of this region. The results revealed that gene diversity within populations was low and that populations did not have significant genetic differentiation. Also, no correlation was found between genetic variability and geographic distance (R2 = 0.031). However, we distinguished two groups of populations. One of them clustered populations with low values of genetic diversity. The other one was made out of populations showing much higher genetic diversity. Cluster 1 was the most geographically widely distributed covering populations from northern part of southern Patagonia to southern part of studied populations in Maritime Antarctica. Cluster 2 had the highest level of polymorphism, but spatially is very restricted to four populations in the Maritime Antarctica and southern Patagonia. We found substructures in some populations of the Maritime Antarctica such as in the Coppermine, Byers and Suffield populations. The underlying causes of this subdivision could be the asexual reproduction and significant abiotic factor affecting ... |
format |
Article in Journal/Newspaper |
author |
Ingrid Hebel Maria Carmen Dacasa Rüdinger Ricardo A. Jaña Joaquin Bastias |
author_facet |
Ingrid Hebel Maria Carmen Dacasa Rüdinger Ricardo A. Jaña Joaquin Bastias |
author_sort |
Ingrid Hebel |
title |
Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia |
title_short |
Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia |
title_full |
Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia |
title_fullStr |
Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia |
title_full_unstemmed |
Genetic Structure and Gene Flow of Moss Sanionia uncinata (Hedw.) Loeske in Maritime Antarctica and Southern-Patagonia |
title_sort |
genetic structure and gene flow of moss sanionia uncinata (hedw.) loeske in maritime antarctica and southern-patagonia |
publisher |
Frontiers Media S.A. |
publishDate |
2018 |
url |
https://doi.org/10.3389/fevo.2018.00152 https://doaj.org/article/0777380478d643a6ba31c2fda4578a1d |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-68.000,-68.000,-68.500,-68.500) ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-58.919,-58.919,-62.194,-62.194) |
geographic |
Patagonia Marguerite Marguerite Bay Byers Suffield |
geographic_facet |
Patagonia Marguerite Marguerite Bay Byers Suffield |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Frontiers in Ecology and Evolution, Vol 6 (2018) |
op_relation |
https://www.frontiersin.org/article/10.3389/fevo.2018.00152/full https://doaj.org/toc/2296-701X 2296-701X doi:10.3389/fevo.2018.00152 https://doaj.org/article/0777380478d643a6ba31c2fda4578a1d |
op_doi |
https://doi.org/10.3389/fevo.2018.00152 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
6 |
_version_ |
1766270776247320576 |