Differential impact of simultaneous migration on coevolving hosts and parasites |
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Authors: | Andrew D Morgan Michael A Brockhurst Laura DC Lopez-Pascua Csaba Pal and Angus Buckling |
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Institution: | (1) Department of Zoology, University of Oxford, Oxford, UK;(2) School of Biological Sciences, University of Liverpool, Liverpool, UK;(3) Department of Biology, Indiana University, Bloomington, Indiana, USA |
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Abstract: | Background The dynamics of antagonistic host-parasite coevolution are believed to be crucially dependent on the rate of migration between
populations. We addressed how the rate of simultaneous migration of host and parasite affected resistance and infectivity
evolution of coevolving meta-populations of the bacterium Pseudomonas fluorescens and a viral parasite (bacteriophage). The increase in genetic variation resulting from small amounts of migration is expected
to increase rates of adaptation of both host and parasite. However, previous studies suggest phages should benefit more from
migration than bacteria; because in the absence of migration, phages are more genetically limited and have a lower evolutionary
potential compared to the bacteria. |
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Keywords: | |
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