Admixture between native and invasive populations may increase invasiveness of Mimulus guttatus

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2015
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Proceedings of the Royal Society of London, Series B : Biological Sciences ; 282 (2015), 1815. - 20151487. - ISSN 0962-8452. - eISSN 1471-2954
Abstract
Self-fertilization and admixture of genotypes from different populations can have major fitness consequences in native species. However, few studies have addressed their potential roles in invasive species. Here, we used plants of Mimulus guttatus from seven native North American, three invasive Scottish and four invasive New Zealand populations to address this. We created seeds from self-fertilization, within-population outcrossing, between-population outcrossing within the same range, and outcrossing between the native and invasive ranges. A greenhouse experiment showed that native and invasive plants of M. guttatus suffered to similar degrees from inbreeding depression, in terms of asexual reproduction and biomass production. After outcrossing with plants from other populations, M. guttatus benefited from heterosis, in terms of asexual and sexual reproduction, and biomass production, particularly when plants from native and invasive populations were crossed. This suggests that, when novel genotypes of M. guttatus from the native North American range will be introduced to the invasive ranges, subsequent outcrossing with M. guttatus plants that are already there might further boost invasiveness of this species.
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570 Biosciences, Biology
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admixture, heterosis, inbreeding depression, invasive plant, outbreeding depression
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ISO 690VAN KLEUNEN, Mark, Michael RÖCKLE, Marc STIFT, 2015. Admixture between native and invasive populations may increase invasiveness of Mimulus guttatus. In: Proceedings of the Royal Society of London, Series B : Biological Sciences. 282(1815), 20151487. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2015.1487
BibTex
@article{vanKleunen2015Admix-31965,
  year={2015},
  doi={10.1098/rspb.2015.1487},
  title={Admixture between native and invasive populations may increase invasiveness of Mimulus guttatus},
  number={1815},
  volume={282},
  issn={0962-8452},
  journal={Proceedings of the Royal Society of London, Series B : Biological Sciences},
  author={van Kleunen, Mark and Röckle, Michael and Stift, Marc},
  note={Article Number: 20151487}
}
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