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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Autores principales:	Hinsby Cadillo-Quiroz, Xavier Didelot, Nicole L Held, Alfa Herrera, Aaron Darling, Michael L Reno, David J Krause, Rachel J Whitaker
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/c4029cd76eb944d6beba2e2efbf9089f
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spelling	oai:doaj.org-article:c4029cd76eb944d6beba2e2efbf9089f2021-11-18T05:36:45ZPatterns of gene flow define species of thermophilic Archaea.1544-91731545-788510.1371/journal.pbio.1001265https://doaj.org/article/c4029cd76eb944d6beba2e2efbf9089f2012-02-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22363207/?tool=EBIhttps://doaj.org/toc/1544-9173https://doaj.org/toc/1545-7885Despite 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.Hinsby Cadillo-QuirozXavier DidelotNicole L HeldAlfa HerreraAaron DarlingMichael L RenoDavid J KrauseRachel J WhitakerPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Biology, Vol 10, Iss 2, p e1001265 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Hinsby Cadillo-Quiroz Xavier Didelot Nicole L Held Alfa Herrera Aaron Darling Michael L Reno David J Krause Rachel J Whitaker Patterns of gene flow define species of thermophilic Archaea.
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
author	Hinsby Cadillo-Quiroz Xavier Didelot Nicole L Held Alfa Herrera Aaron Darling Michael L Reno David J Krause Rachel J Whitaker
author_facet	Hinsby Cadillo-Quiroz Xavier Didelot Nicole L Held Alfa Herrera Aaron Darling Michael L Reno David J Krause Rachel J Whitaker
author_sort	Hinsby Cadillo-Quiroz
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 (PLoS)
publishDate	2012
url	https://doaj.org/article/c4029cd76eb944d6beba2e2efbf9089f
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_version_	1718424878676180992

Patterns of gene flow define species of thermophilic Archaea.

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