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Molecular phylogeny and evolution of morphology in the social amoebas

Schaap, P., Winckler, T., Nelson, M., Alvarez-Curto, E., Elgie, B., Hagiwara, H., Cavender, J., Milano-Curto, A., Rozen, D.E., Dingermann, T., Mutzel, R. and Baldauf, S.L. (2006) Molecular phylogeny and evolution of morphology in the social amoebas. Science, 314 (5799). pp. 661-663. ISSN 0036-8075

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The social amoebas (Dictyostelia) display conditional multicellularity in a wide variety of forms. Despite widespread interest in Dictyostelium discoideum as a model system, almost no molecular data exist from the rest of the group. We constructed the first molecular phylogeny of the Dictyostelia with parallel small subunit ribosomal RNA and a-tubulin data sets, and we found that dictyostelid taxonomy requires complete revision. A mapping of characters onto the phylogeny shows that the dominant trend in dictyostelid evolution is increased size and cell type specialization of fruiting structures, with some complex morphologies evolving several times independently. Thus, the latter may be controlled by only a few genes, making their underlying mechanisms relatively easy to unravel.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Biology (York)
Depositing User: York RAE Import
Date Deposited: 12 Feb 2009 14:11
Last Modified: 12 Feb 2009 14:11
Published Version: http://dx.doi.org/10.1126/science.1130670
Status: Published
Publisher: American Association for the Advancement of Science
Refereed: Yes
Identification Number: 10.1126/science.1130670
URI: http://eprints.whiterose.ac.uk/id/eprint/7487

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