A phylogeographic study of the cosmopolitan genus Phragmites (Poaceae) based on AFLPs |
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Authors: | C Lambertini M H G Gustafsson J Frydenberg J Lissner M Speranza H Brix |
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Institution: | 1. Department of Biological Sciences, University of Aarhus, ?rhus, Denmark 4. Department of Biological Sciences, University of Aarhus, Ole Worms Allè, Building 135, 8000, ?rhus C, Denmark 5. Department of Biological Sciences, University of Aarhus, Ny Munkegade, Building 1540, 8000, ?rhus C, Denmark 2. Department of Environment and Infrastructure, Ringk?bing County, Damstr?det 2, 6950, Ringk?bing, Denmark 3. Department of Agro-environmental Sciences and Technologies, University of Bologna, via Fanin 44, 40127, Bologna, Italy
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Abstract: | Within the genus Phragmites (Poaceae), the species P. australis (the common reed) is virtually cosmopolitan, and shows considerable variation in ploidy level and morphology. Genetic variation
in Phragmites was studied using AFLPs, and analysed with parsimony and distance methods. Groups of P. australis strongly supported in the analyses include one that comprises all South American clones, a distinct group from the US Gulf
Coast, and a group of E. Asian and Australian octoploids. Among the other species, the paleotropical P. vallatoria is supported as monophyletic and most closely related to the paraphyletic P. mauritianus and to the Gulf Coast and S. American groups. The E. Asian species P. japonicus is closely related to a group of P. australis clones mostly from central North America. Tetraploidy predominates in the genus, and optimisation of chromosome numbers onto
the phylogeny shows that higher ploidy levels have evolved many times. |
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Keywords: | Phragmites common reed phylogeography AFLP polyploidy |
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