Patterns of gene flow define species of Thermophilic Archaea
Despite a growing appreciation of their vast diversity in nature, mechanisms of speciation are poorly understood in Bacteria and Archaea. Here we use high-throughput genome sequencing to identify ongoing speciation in the thermoacidophilic Archaeon Sulfolobus islandicus. Patterns of homologous gene...
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ftuwarwick:oai:wrap.warwick.ac.uk:109234 2023-05-15T16:59:15+02:00 Patterns of gene flow define species of Thermophilic Archaea Barton, Nick H. Cadillo-Quiroz, Hinsby Didelot, Xavier Held, Nicole L. Herrera, Alfa Darling, Aaron Reno, Michael L. Krause, David J. Whitaker, Rachel J. 2012-01-21 http://wrap.warwick.ac.uk/109234/ https://doi.org/10.1371/journal.pbio.1001265 unknown Public Library of Science Barton, Nick H., Cadillo-Quiroz, Hinsby, Didelot, Xavier, Held, Nicole L., Herrera, Alfa, Darling, Aaron, Reno, Michael L., Krause, David J. and Whitaker, Rachel J. (2012) Patterns of gene flow define species of Thermophilic Archaea. PLoS Biology, 10 (2). e1001265. doi:10.1371/journal.pbio.1001265 <http://dx.doi.org/10.1371/journal.pbio.1001265> Journal Article NonPeerReviewed 2012 ftuwarwick https://doi.org/10.1371/journal.pbio.1001265 2022-03-16T21:24:44Z Despite a growing appreciation of their vast diversity in nature, mechanisms of speciation are poorly understood in Bacteria and Archaea. Here we use high-throughput genome sequencing to identify ongoing speciation in the thermoacidophilic Archaeon Sulfolobus islandicus. Patterns of homologous gene flow among genomes of 12 strains from a single hot spring in Kamchatka, Russia, demonstrate higher levels of gene flow within than between two persistent, coexisting groups, demonstrating that these microorganisms fit the biological species concept. Furthermore, rates of gene flow between two species are decreasing over time in a manner consistent with incipient speciation. Unlike other microorganisms investigated, we do not observe a relationship between genetic divergence and frequency of recombination along a chromosome, or other physical mechanisms that would reduce gene flow between lineages. Each species has its own genetic island encoding unique physiological functions and a unique growth phenotype that may be indicative of ecological specialization. Genetic differentiation between these coexisting groups occurs in large genomic “continents,” indicating the topology of genomic divergence during speciation is not uniform and is not associated with a single locus under strong diversifying selection. These data support a model where species do not require physical barriers to gene flow but are maintained by ecological differentiation. Article in Journal/Newspaper Kamchatka The University of Warwick: WRAP - Warwick Research Archive Portal PLoS Biology 10 2 e1001265 |
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The University of Warwick: WRAP - Warwick Research Archive Portal |
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description |
Despite a growing appreciation of their vast diversity in nature, mechanisms of speciation are poorly understood in Bacteria and Archaea. Here we use high-throughput genome sequencing to identify ongoing speciation in the thermoacidophilic Archaeon Sulfolobus islandicus. Patterns of homologous gene flow among genomes of 12 strains from a single hot spring in Kamchatka, Russia, demonstrate higher levels of gene flow within than between two persistent, coexisting groups, demonstrating that these microorganisms fit the biological species concept. Furthermore, rates of gene flow between two species are decreasing over time in a manner consistent with incipient speciation. Unlike other microorganisms investigated, we do not observe a relationship between genetic divergence and frequency of recombination along a chromosome, or other physical mechanisms that would reduce gene flow between lineages. Each species has its own genetic island encoding unique physiological functions and a unique growth phenotype that may be indicative of ecological specialization. Genetic differentiation between these coexisting groups occurs in large genomic “continents,” indicating the topology of genomic divergence during speciation is not uniform and is not associated with a single locus under strong diversifying selection. These data support a model where species do not require physical barriers to gene flow but are maintained by ecological differentiation. |
format |
Article in Journal/Newspaper |
author |
Barton, Nick H. Cadillo-Quiroz, Hinsby Didelot, Xavier Held, Nicole L. Herrera, Alfa Darling, Aaron Reno, Michael L. Krause, David J. Whitaker, Rachel J. |
spellingShingle |
Barton, Nick H. Cadillo-Quiroz, Hinsby Didelot, Xavier Held, Nicole L. Herrera, Alfa Darling, Aaron Reno, Michael L. Krause, David J. Whitaker, Rachel J. Patterns of gene flow define species of Thermophilic Archaea |
author_facet |
Barton, Nick H. Cadillo-Quiroz, Hinsby Didelot, Xavier Held, Nicole L. Herrera, Alfa Darling, Aaron Reno, Michael L. Krause, David J. Whitaker, Rachel J. |
author_sort |
Barton, Nick H. |
title |
Patterns of gene flow define species of Thermophilic Archaea |
title_short |
Patterns of gene flow define species of Thermophilic Archaea |
title_full |
Patterns of gene flow define species of Thermophilic Archaea |
title_fullStr |
Patterns of gene flow define species of Thermophilic Archaea |
title_full_unstemmed |
Patterns of gene flow define species of Thermophilic Archaea |
title_sort |
patterns of gene flow define species of thermophilic archaea |
publisher |
Public Library of Science |
publishDate |
2012 |
url |
http://wrap.warwick.ac.uk/109234/ https://doi.org/10.1371/journal.pbio.1001265 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
Barton, Nick H., Cadillo-Quiroz, Hinsby, Didelot, Xavier, Held, Nicole L., Herrera, Alfa, Darling, Aaron, Reno, Michael L., Krause, David J. and Whitaker, Rachel J. (2012) Patterns of gene flow define species of Thermophilic Archaea. PLoS Biology, 10 (2). e1001265. doi:10.1371/journal.pbio.1001265 <http://dx.doi.org/10.1371/journal.pbio.1001265> |
op_doi |
https://doi.org/10.1371/journal.pbio.1001265 |
container_title |
PLoS Biology |
container_volume |
10 |
container_issue |
2 |
container_start_page |
e1001265 |
_version_ |
1766051477106720768 |