Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus'
Although microorganisms make up the preponderance of the biodiversity on Earth, the ecological and evolutionary factors that structure microbial populations are not well understood. We investigated the genetic structure of a thermoacidophilic crenarchaeal species, Sulfolobus ‘islandicus’ , using mul...
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fthighwire:oai:open-archive.highwire.org:molbiolevol:msi233v1 2023-05-15T16:59:08+02:00 Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus' Whitaker, Rachel J. Grogan, Dennis W. Taylor, John W. 2005-08-10 17:03:02.0 text/html http://mbe.oxfordjournals.org/cgi/content/short/msi233v1 https://doi.org/10.1093/molbev/msi233 en eng Oxford University Press http://mbe.oxfordjournals.org/cgi/content/short/msi233v1 http://dx.doi.org/10.1093/molbev/msi233 Copyright (C) 2005, Society for Molecular Biology and Evolution Research Article TEXT 2005 fthighwire https://doi.org/10.1093/molbev/msi233 2013-05-27T15:52:21Z Although microorganisms make up the preponderance of the biodiversity on Earth, the ecological and evolutionary factors that structure microbial populations are not well understood. We investigated the genetic structure of a thermoacidophilic crenarchaeal species, Sulfolobus ‘islandicus’ , using multilocus sequence analysis of six variable protein-coding loci on a set of 60 isolates from the Mutnovsky region of Kamchatka, Russia. We demonstrate significant incongruence among gene geneologies and a lack of association between alleles consistent with recombination rates greater than rate of mutation. The observation of high relative rates of recombination suggests that the structure of this natural population does not fit the periodic selection model often used to describe populations of asexual microorganisms. We propose instead that frequent recombination among closely related individuals prevents periodic selection from purging diversity and provides a fundamental cohesive mechanism within this and perhaps other microbial species. Text Kamchatka HighWire Press (Stanford University) Molecular Biology and Evolution 22 12 2354 2361 |
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HighWire Press (Stanford University) |
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English |
topic |
Research Article |
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Research Article Whitaker, Rachel J. Grogan, Dennis W. Taylor, John W. Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus' |
topic_facet |
Research Article |
description |
Although microorganisms make up the preponderance of the biodiversity on Earth, the ecological and evolutionary factors that structure microbial populations are not well understood. We investigated the genetic structure of a thermoacidophilic crenarchaeal species, Sulfolobus ‘islandicus’ , using multilocus sequence analysis of six variable protein-coding loci on a set of 60 isolates from the Mutnovsky region of Kamchatka, Russia. We demonstrate significant incongruence among gene geneologies and a lack of association between alleles consistent with recombination rates greater than rate of mutation. The observation of high relative rates of recombination suggests that the structure of this natural population does not fit the periodic selection model often used to describe populations of asexual microorganisms. We propose instead that frequent recombination among closely related individuals prevents periodic selection from purging diversity and provides a fundamental cohesive mechanism within this and perhaps other microbial species. |
format |
Text |
author |
Whitaker, Rachel J. Grogan, Dennis W. Taylor, John W. |
author_facet |
Whitaker, Rachel J. Grogan, Dennis W. Taylor, John W. |
author_sort |
Whitaker, Rachel J. |
title |
Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus' |
title_short |
Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus' |
title_full |
Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus' |
title_fullStr |
Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus' |
title_full_unstemmed |
Recombination Shapes the Natural Population Structure of the Hyperthermophilic Archaeon Sulfolobus 'islandicus' |
title_sort |
recombination shapes the natural population structure of the hyperthermophilic archaeon sulfolobus 'islandicus' |
publisher |
Oxford University Press |
publishDate |
2005 |
url |
http://mbe.oxfordjournals.org/cgi/content/short/msi233v1 https://doi.org/10.1093/molbev/msi233 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
http://mbe.oxfordjournals.org/cgi/content/short/msi233v1 http://dx.doi.org/10.1093/molbev/msi233 |
op_rights |
Copyright (C) 2005, Society for Molecular Biology and Evolution |
op_doi |
https://doi.org/10.1093/molbev/msi233 |
container_title |
Molecular Biology and Evolution |
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22 |
container_issue |
12 |
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2354 |
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2361 |
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1766051328264503296 |