Systematics Section / ASPT
Evans, Timothy M. , Dondero, Mark , Wixson, Matthew C. , Ball, Eric M. , Faden, Robert B. .
Phylogenetic Examination of the Genus Aneilema (Commelinaceae) based on Nuclear and Chloroplast DNA Sequences.
The genus Aneilema (Commelinaceae) comprises 63 species from three geographic areas: sub-Saharan Africa, Madagascar and the Arabian Peninsula (58 species); Australia and surrounding islands (5 species); and tropical America (1 species). A molecular phylogenetic analysis is being undertaken to examine relationships within the genus. Using DNA sequences from a chloroplast DNA intergenic spacer (trnL-trnF) and nuclear ribosomal internal transcribed spacers (ITS), several preliminary conclusions can be drawn about the classification of Aneilema: 1) Aneilema is not monophyletic, due to the inclusion of Rhopalephora within the Aneilema clade; 2) Aneilema plus Rhopalephora form a monophyletic clade if the neotropical A. brasiliense is excluded, as was suggested by Faden (1991); 3) the sections recognized by Faden (1991) are not supported; 4) Pollia is the sister genus to Aneilema; and 5) Aneilema brasiliense is closer to Pollia than it is to the Aneilema-Rhopalephora clade. Additional species and DNA regions are being added to the data matrix in order to provide a fine-scale species-level phylogeny for the genus.
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1 - Hope College, Biology, Science Center, 35 East 12th Street, Holland, Michigan, 49423-9000, USA
2 - Hope College, Biology, Science Center, 35 East 12th Street, Holland, MI, 49423-9000, USA
3 - Smithsonian Institution, Department of Botany MRC 166, National Museum Of Natural History, Po Box 37012, Washington, DC, 20560-0166, USA
Presentation Type: Poster:Posters for Sections
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM