Population size changes and selection drive patterns of parallel evolution in a host–virus system

Frickel, Jens; Feulner, Philine; Karakoc, Emre; Becks, Lutz (2018). Population size changes and selection drive patterns of parallel evolution in a host–virus system. Nature communications, 9(1) Nature Publishing Group 10.1038/s41467-018-03990-7

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Predicting the repeatability of evolution remains elusive. Theory and empirical studies sug- gest that strong selection and large population sizes increase the probability for parallel evolution at the phenotypic and genotypic levels. However, selection and population sizes are not constant, but rather change continuously and directly affect each other even on short time scales. Here, we examine the degree of parallel evolution shaped through eco- evolutionary dynamics in an algal host population coevolving with a virus. We fi nd high degrees of parallelism at the level of population size changes (ecology) and at the phenotypic level between replicated populations. At the genomic level, we fi nd evidence for parallelism, as the same large genomic region was duplicated in all replicated populations, but also substantial novel sequence divergence between replicates. These patterns of genome evo- lution can be explained by considering population size changes as an important driver of rapid evolution.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology

UniBE Contributor:

Feulner, Philine

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

2041-1723

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

14 May 2018 13:49

Last Modified:

25 Oct 2019 00:49

Publisher DOI:

10.1038/s41467-018-03990-7

BORIS DOI:

10.7892/boris.116476

URI:

https://boris.unibe.ch/id/eprint/116476

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