Consequences of clonality for sexual fitness : Clonal expansion enhances fitness under spatially restricted dispersal

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2015
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Van Drunen, Wendy E.
Dorken, Marcel E.
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Proceedings of the National Academy of Sciences of the United States of America : PNAS. 2015, 112(29), pp. 8929-8936. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.1501720112
Zusammenfassung

Clonality is a pervasive feature of sessile organisms, but this form of asexual reproduction is thought to interfere with sexual fitness via the movement of gametes among the modules that comprise the clone. This within-clone movement of gametes is expected to reduce sexual fitness via mate limitation of male reproductive success and, in some cases, via the production of highly inbred (i.e., self-fertilized) offspring. However, clonality also results in the spatial expansion of the genetic individual (i.e., genet), and this should decrease distances gametes and sexually produced offspring must travel to avoid competing with other gametes and offspring from the same clone. The extent to which any negative effects of clonality on mating success might be offset by the positive effects of spatial expansion is poorly understood. Here, we develop spatially explicit models in which fitness was determined by the success of genets through their male and female sex functions. Our results indicate that clonality serves to increase sexual fitness when it is associated with the outward expansion of the genet. Our models further reveal that the main fitness benefit of clonal expansion might occur through the dispersal of offspring over a wider area compared with nonclonal phenotypes. We conclude that, instead of interfering with sexual reproduction, clonal expansion should often serve to enhance sexual fitness.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie
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asexual reproduction, geitonogamy, genet, modularity, ramet
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undefined / . - undefined, undefined
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ISO 690VAN DRUNEN, Wendy E., Mark VAN KLEUNEN, Marcel E. DORKEN, 2015. Consequences of clonality for sexual fitness : Clonal expansion enhances fitness under spatially restricted dispersal. In: Proceedings of the National Academy of Sciences of the United States of America : PNAS. 2015, 112(29), pp. 8929-8936. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.1501720112
BibTex
@article{VanDrunen2015Conse-31813,
  year={2015},
  doi={10.1073/pnas.1501720112},
  title={Consequences of clonality for sexual fitness : Clonal expansion enhances fitness under spatially restricted dispersal},
  number={29},
  volume={112},
  issn={0027-8424},
  journal={Proceedings of the National Academy of Sciences of the United States of America : PNAS},
  pages={8929--8936},
  author={Van Drunen, Wendy E. and van Kleunen, Mark and Dorken, Marcel E.}
}
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