Population structure and genetic variation of fragmented mountain birch forests in Iceland
Betula pubescens Ehrh. (mountain birch) is the only forest-forming tree in Iceland. Since human settlement (874 AD), the continuous 25,000 to 30,000 km(2) forest has shrunk to 1.200 km(2) of fragmented patches, making it a good object to study population genetic consequences of habitat fragmentation...
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ftpubmed:oai:pubmedcentral.nih.gov:10078168 2023-05-15T15:44:28+02:00 Population structure and genetic variation of fragmented mountain birch forests in Iceland Pálsson, Snæbjörn Wasowicz, Pawel Heiðmarsson, Starri Magnússon, Kristinn Pétur 2022-11-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10078168/ http://www.ncbi.nlm.nih.gov/pubmed/36331896 https://doi.org/10.1093/jhered/esac062 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10078168/ http://www.ncbi.nlm.nih.gov/pubmed/36331896 http://dx.doi.org/10.1093/jhered/esac062 © The American Genetic Association. 2022. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com J Hered Original Articles Text 2022 ftpubmed https://doi.org/10.1093/jhered/esac062 2023-04-09T01:08:07Z Betula pubescens Ehrh. (mountain birch) is the only forest-forming tree in Iceland. Since human settlement (874 AD), the continuous 25,000 to 30,000 km(2) forest has shrunk to 1.200 km(2) of fragmented patches, making it a good object to study population genetic consequences of habitat fragmentation and disturbance. Further, genetic studies have also shown that hybridization between the tetraploid (2n = 56) B. pubescens and the diploid (2n = 28) Betula nana L. (dwarf birch) occurs among Iceland’s natural populations. This study assessed the genetic variation within and among 11 birch forests remaining across Iceland. Genotype-by-sequencing methodology provided a total of 24,585 single nucleotide polymorphisms (SNP´s), with a minor allele frequency >5% for genetic analyses. The analysis showed similar diversity within forests, suggesting that fragmentation and hybridization have had a limited effect on the genetic variation within sites. A clear genetic divergence is found among forests from the different regions of Iceland that may reflect historical isolation; the differentiation between forests increased with geographic distances reflecting isolation by distance. Information on the distribution of genetic variation of birch in Iceland is essential for its conservation and to establish genotype–phenotype associations to predict responses to new environmental conditions imposed by climate change and novel biotic/abiotic stressors. Text Betula nana Dwarf birch Iceland PubMed Central (PMC) Journal of Heredity 114 2 165 174 |
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Original Articles |
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Original Articles Pálsson, Snæbjörn Wasowicz, Pawel Heiðmarsson, Starri Magnússon, Kristinn Pétur Population structure and genetic variation of fragmented mountain birch forests in Iceland |
topic_facet |
Original Articles |
description |
Betula pubescens Ehrh. (mountain birch) is the only forest-forming tree in Iceland. Since human settlement (874 AD), the continuous 25,000 to 30,000 km(2) forest has shrunk to 1.200 km(2) of fragmented patches, making it a good object to study population genetic consequences of habitat fragmentation and disturbance. Further, genetic studies have also shown that hybridization between the tetraploid (2n = 56) B. pubescens and the diploid (2n = 28) Betula nana L. (dwarf birch) occurs among Iceland’s natural populations. This study assessed the genetic variation within and among 11 birch forests remaining across Iceland. Genotype-by-sequencing methodology provided a total of 24,585 single nucleotide polymorphisms (SNP´s), with a minor allele frequency >5% for genetic analyses. The analysis showed similar diversity within forests, suggesting that fragmentation and hybridization have had a limited effect on the genetic variation within sites. A clear genetic divergence is found among forests from the different regions of Iceland that may reflect historical isolation; the differentiation between forests increased with geographic distances reflecting isolation by distance. Information on the distribution of genetic variation of birch in Iceland is essential for its conservation and to establish genotype–phenotype associations to predict responses to new environmental conditions imposed by climate change and novel biotic/abiotic stressors. |
format |
Text |
author |
Pálsson, Snæbjörn Wasowicz, Pawel Heiðmarsson, Starri Magnússon, Kristinn Pétur |
author_facet |
Pálsson, Snæbjörn Wasowicz, Pawel Heiðmarsson, Starri Magnússon, Kristinn Pétur |
author_sort |
Pálsson, Snæbjörn |
title |
Population structure and genetic variation of fragmented mountain birch forests in Iceland |
title_short |
Population structure and genetic variation of fragmented mountain birch forests in Iceland |
title_full |
Population structure and genetic variation of fragmented mountain birch forests in Iceland |
title_fullStr |
Population structure and genetic variation of fragmented mountain birch forests in Iceland |
title_full_unstemmed |
Population structure and genetic variation of fragmented mountain birch forests in Iceland |
title_sort |
population structure and genetic variation of fragmented mountain birch forests in iceland |
publisher |
Oxford University Press |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10078168/ http://www.ncbi.nlm.nih.gov/pubmed/36331896 https://doi.org/10.1093/jhered/esac062 |
genre |
Betula nana Dwarf birch Iceland |
genre_facet |
Betula nana Dwarf birch Iceland |
op_source |
J Hered |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10078168/ http://www.ncbi.nlm.nih.gov/pubmed/36331896 http://dx.doi.org/10.1093/jhered/esac062 |
op_rights |
© The American Genetic Association. 2022. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
op_doi |
https://doi.org/10.1093/jhered/esac062 |
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Journal of Heredity |
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114 |
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2 |
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165 |
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174 |
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1766378855177650176 |