Recent Topics Posters
Burke, Janelle , Luckow, Melissa .
Phylogenetics of the Dichrostachys group (Leguminosae: Mimosoideae) based on nuclear and chloroplast gene regions and morphology.
THE Dichrostachys group consists of four genera, three of which are either endemic to Madagascar or most diverse there. A phylogenetic study of roughly 90% of the ca. 32 species in the Dichrostachys group was undertaken to better circumscribe generic limits. New molecular data were acquired from the chloroplast intergenic region psbA-trnH, providing 26 phylogenetically informative characters. Analysis of these data alone were largely congruent with previous analyses based on morphology and the nuclear ITS region, although there was lack of resolution in several key areas. Consequently, the psbA-trnH data were combined with ITS and morphology to produce a more resolved and better supported phylogeny. The genus Gagnebina is monophyletic, but Dichrostachys as currently defined is not. Dichrostachys richardiana is most closely related to species of Alantsilodendron, and D. cinerea and allies form a clade distinct from the Malagasy Dichrostachys.
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1 - Cornell University, L.H. Bailey Hortorium, Plant Biology, 228 Plant Sciences, Ithaca, NY, 14853, USA
Presentation Type: Recent Topics Poster
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM