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Population genomic and historical analysis suggests a global invasion by bridgehead processes in Mimulus guttatus

Vallejo-Mar�n, Mario; Friedman, Jannice; Twyford, Alex D.; Lepais, Olivier; Ickert-Bond, Stefanie M.; Streisfeld, Matthew A.; Yant, Levi; van Kleunen, Mark; Rotter, Michael C.; Puzey, Joshua R.

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Authors

Mario Vallejo-Mar�n

Jannice Friedman

Alex D. Twyford

Olivier Lepais

Stefanie M. Ickert-Bond

Matthew A. Streisfeld

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LEVI YANT LEVI.YANT@NOTTINGHAM.AC.UK
Professor of Evolutionary Genomics

Mark van Kleunen

Michael C. Rotter

Joshua R. Puzey



Abstract

© 2021, The Author(s). Imperfect historical records and complex demographic histories present challenges for reconstructing the history of biological invasions. Here, we combine historical records, extensive worldwide and genome-wide sampling, and demographic analyses to investigate the global invasion of Mimulus guttatus from North America to Europe and the Southwest Pacific. By sampling 521 plants from 158 native and introduced populations genotyped at >44,000 loci, we determined that invasive M. guttatus was first likely introduced to the British Isles from the Aleutian Islands (Alaska), followed by admixture from multiple parts of the native range. We hypothesise that populations in the British Isles then served as a bridgehead for vanguard invasions worldwide. Our results emphasise the highly admixed nature of introduced M. guttatus and demonstrate the potential of introduced populations to serve as sources of secondary admixture, producing novel hybrids. Unravelling the history of biological invasions provides a starting point to understand how invasive populations adapt to novel environments.

Citation

Vallejo-Marín, M., Friedman, J., Twyford, A. D., Lepais, O., Ickert-Bond, S. M., Streisfeld, M. A., …Puzey, J. R. (2021). Population genomic and historical analysis suggests a global invasion by bridgehead processes in Mimulus guttatus. Communications Biology, 4(1), https://doi.org/10.1038/s42003-021-01795-x

Journal Article Type Article
Acceptance Date Feb 5, 2021
Online Publication Date Mar 12, 2021
Publication Date Dec 1, 2021
Deposit Date Mar 17, 2021
Publicly Available Date Mar 22, 2021
Journal Communications Biology
Electronic ISSN 2399-3642
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 4
Issue 1
DOI https://doi.org/10.1038/s42003-021-01795-x
Public URL https://nottingham-repository.worktribe.com/output/5394887
Publisher URL https://www.nature.com/articles/s42003-021-01795-x
Additional Information Received: 15 July 2020; Accepted: 5 February 2021; First Online: 12 March 2021; : The authors declare no competing interests.

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