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Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation

Biological populations may survive lethal environmental stress through evolutionary rescue. The rescued populations typically suffer a reduction in growth performance and harbor very low genetic diversity compared with their parental populations. The present study addresses how population size and w...

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Autores principales: Zhou, Dong‐Hao, Zhang, Quan‐Guo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8293784/
https://www.ncbi.nlm.nih.gov/pubmed/34306654
http://dx.doi.org/10.1002/ece3.7792
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author Zhou, Dong‐Hao
Zhang, Quan‐Guo
author_facet Zhou, Dong‐Hao
Zhang, Quan‐Guo
author_sort Zhou, Dong‐Hao
collection PubMed
description Biological populations may survive lethal environmental stress through evolutionary rescue. The rescued populations typically suffer a reduction in growth performance and harbor very low genetic diversity compared with their parental populations. The present study addresses how population size and within‐population diversity may recover through compensatory evolution, using the experimental adaptive radiation of bacterium Pseudomonas fluorescens. We exposed bacterial populations to an antibiotic treatment and then imposed a one‐individual‐size population bottleneck on those surviving the antibiotic stress. During the subsequent compensatory evolution, population size increased and leveled off very rapidly. The increase of diversity was of slower paces and persisted longer. In the very early stage of compensatory evolution, populations of large sizes had a greater chance to diversify; however, this productivity–diversification relationship was not observed in later stages. Population size and diversity from the end of the compensatory evolution was not contingent on initial population growth performance. We discussed the possibility that our results be explained by the emergence of a “holey” fitness landscape under the antibiotic stress.
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spelling pubmed-82937842021-07-23 Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation Zhou, Dong‐Hao Zhang, Quan‐Guo Ecol Evol Original Research Biological populations may survive lethal environmental stress through evolutionary rescue. The rescued populations typically suffer a reduction in growth performance and harbor very low genetic diversity compared with their parental populations. The present study addresses how population size and within‐population diversity may recover through compensatory evolution, using the experimental adaptive radiation of bacterium Pseudomonas fluorescens. We exposed bacterial populations to an antibiotic treatment and then imposed a one‐individual‐size population bottleneck on those surviving the antibiotic stress. During the subsequent compensatory evolution, population size increased and leveled off very rapidly. The increase of diversity was of slower paces and persisted longer. In the very early stage of compensatory evolution, populations of large sizes had a greater chance to diversify; however, this productivity–diversification relationship was not observed in later stages. Population size and diversity from the end of the compensatory evolution was not contingent on initial population growth performance. We discussed the possibility that our results be explained by the emergence of a “holey” fitness landscape under the antibiotic stress. John Wiley and Sons Inc. 2021-06-16 /pmc/articles/PMC8293784/ /pubmed/34306654 http://dx.doi.org/10.1002/ece3.7792 Text en © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Zhou, Dong‐Hao
Zhang, Quan‐Guo
Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation
title Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation
title_full Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation
title_fullStr Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation
title_full_unstemmed Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation
title_short Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation
title_sort compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8293784/
https://www.ncbi.nlm.nih.gov/pubmed/34306654
http://dx.doi.org/10.1002/ece3.7792
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