Sympatric speciation: when is it possible in bacteria?

According to theory, sympatric speciation in sexual eukaryotes is favored when relatively few loci in the genome are sufficient for reproductive isolation and adaptation to different niches. Here we show a similar result for clonally reproducing bacteria, but which comes about for different reasons....

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Autores principales:	Jonathan Friedman, Eric J Alm, B Jesse Shapiro
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4fa480a5149f43eb9af24de0917211fe
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spelling	oai:doaj.org-article:4fa480a5149f43eb9af24de0917211fe2021-11-18T08:01:07ZSympatric speciation: when is it possible in bacteria?1932-620310.1371/journal.pone.0053539https://doaj.org/article/4fa480a5149f43eb9af24de0917211fe2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23349716/?tool=EBIhttps://doaj.org/toc/1932-6203According to theory, sympatric speciation in sexual eukaryotes is favored when relatively few loci in the genome are sufficient for reproductive isolation and adaptation to different niches. Here we show a similar result for clonally reproducing bacteria, but which comes about for different reasons. In simulated microbial populations, there is an evolutionary tradeoff between early and late stages of niche adaptation, which is resolved when relatively few loci are required for adaptation. At early stages, recombination accelerates adaptation to new niches (ecological speciation) by combining multiple adaptive alleles into a single genome. Later on, without assortative mating or other barriers to gene flow, recombination generates unfit intermediate genotypes and homogenizes incipient species. The solution to this tradeoff may be simply to reduce the number of loci required for speciation, or to reduce recombination between species over time. Both solutions appear to be relevant in natural microbial populations, allowing them to diverge into ecological species under similar constraints as sexual eukaryotes, despite differences in their life histories.Jonathan FriedmanEric J AlmB Jesse ShapiroPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 1, p e53539 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jonathan Friedman Eric J Alm B Jesse Shapiro Sympatric speciation: when is it possible in bacteria?
description	According to theory, sympatric speciation in sexual eukaryotes is favored when relatively few loci in the genome are sufficient for reproductive isolation and adaptation to different niches. Here we show a similar result for clonally reproducing bacteria, but which comes about for different reasons. In simulated microbial populations, there is an evolutionary tradeoff between early and late stages of niche adaptation, which is resolved when relatively few loci are required for adaptation. At early stages, recombination accelerates adaptation to new niches (ecological speciation) by combining multiple adaptive alleles into a single genome. Later on, without assortative mating or other barriers to gene flow, recombination generates unfit intermediate genotypes and homogenizes incipient species. The solution to this tradeoff may be simply to reduce the number of loci required for speciation, or to reduce recombination between species over time. Both solutions appear to be relevant in natural microbial populations, allowing them to diverge into ecological species under similar constraints as sexual eukaryotes, despite differences in their life histories.
format	article
author	Jonathan Friedman Eric J Alm B Jesse Shapiro
author_facet	Jonathan Friedman Eric J Alm B Jesse Shapiro
author_sort	Jonathan Friedman
title	Sympatric speciation: when is it possible in bacteria?
title_short	Sympatric speciation: when is it possible in bacteria?
title_full	Sympatric speciation: when is it possible in bacteria?
title_fullStr	Sympatric speciation: when is it possible in bacteria?
title_full_unstemmed	Sympatric speciation: when is it possible in bacteria?
title_sort	sympatric speciation: when is it possible in bacteria?
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/4fa480a5149f43eb9af24de0917211fe
work_keys_str_mv	AT jonathanfriedman sympatricspeciationwhenisitpossibleinbacteria AT ericjalm sympatricspeciationwhenisitpossibleinbacteria AT bjesseshapiro sympatricspeciationwhenisitpossibleinbacteria
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Sympatric speciation: when is it possible in bacteria?

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