Chung, Kyong-Sook , Elisens, Wayne .
Phylogeny and inferred cytogeographic patterns of subtribe Agrimoniinae (Rosaceae).
Subtribe Agrimoniinae (Rosoideae) is comprised of four monotypic narrow endemic genera (Aremonia, Hagenia, Leucosidea, and Spenceria) and the widely distributed genus Agrimonia. To test phylogenetic, bio- and cytogeographic hypotheses, a phylogeny was constructed from sequence variation in the nuclear GBSSI-1 and the plastid regions trnL-trnF and trnS-trnG-trnG. All analyses support strongly the monophyly of subtribe Agrimoniinae with the S Central Asian genus Spenceria(2n=2x=14) as the basal group, and a lineage comprising the E and S African genera Hagenia + Leucosidea, which are in turn sister to a monophyletic group made up of Agrimonia (4x, 8x) + Aremonia (6x; a W European monotype). In Agrimonia, analyses of GBSSI-1 resolve robustly a lineage of Asian and American tetraploids (Agrimonia coreana, A. microcarpa, A. parviflora, and A. rostellata) sister to tetraploid, hexaploid, and octoploid species. Our results suggest a Tethyan ancestry of the subtribe with subsequent diversification to S Africa and temperate Eurasia and North America. Geographic range is associated with ploidy level in Agrimonia s. lat. with tetraploids having narrow ranges in W Europe, E Asia, and E North America and octoploids having wide ranges throughout the northern hemisphere.
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1 - The Morton Arboretum, 4100 Illinois Route 53, Lisle, IL, 60532, USA
2 - University of Oklahoma, Botany & Microbiology and Oklahoma Biological Survey, 770 Van Vleet Oval, Norman, Oklahoma, 73019, USA
Presentation Type: Oral Paper:Papers for BSA Sections
Location: Alpine C/Snowbird Center
Date: Monday, July 27th, 2009
Time: 9:45 AM