Phylogeography and sexual macrocyst formation in the social amoeba <Emphasis Type="Italic">Dictyostelium giganteum</Emphasis> |
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Authors: | Natasha J Mehdiabadi Marcus R Kronforst David C Queller Joan E Strassmann |
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Institution: | (1) Department of Ecology and Evolutionary Biology, Rice University, 77005 Houston, Texas, USA;(2) Department of Entomology and Laboratories of Analytical Biology, National Museum of Natural History, Smithsonian Institution, P. O. Box 37012, 20013-7012 Washington, DC, USA;(3) FAS Center for Systems Biology, Harvard University, 52 Oxford Street, 02138 Cambridge, Massachusetts, USA |
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Abstract: | Background Microorganisms are ubiquitous, yet we are only beginning to understand their diversity and population structure. Social amoebae
(Dictyostelia) are a diverse group of unicellular eukaryotic microbes that display a unique social behaviour upon starvation
in which cells congregate and then some die to help others survive and disperse. The genetic relationships among co-occurring
cells have a major influence on the evolution of social traits and recent population genetic analysis found extensive genetic
variation and possible cryptic speciation in one dictyostelid species (Dictyostelium purpureum). To further characterize the interplay among genetic variation, species boundaries, social behaviour, and reproductive isolation
in the Dictyostelia, we conducted phylogenetic analyses and mating experiments with the geographically widespread social amoeba
Dictyostelium giganteum. |
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