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"Phylogenetics
of Diseae (Orchidaceae)"
by
Tim Fulcher
Royal Botanic Gardens, Kew
United Kingdom
Thursday,
18 Dec 2003: 4pm - 5pm
DBS
Conference Room,
Block S3, Level 5, Science Drive 4,
Department of Biological Sciences,
National University of Singapore
Host:
Adrian Loo
Abstract
matK Diseae (Orchidaceae) are the largest and floristically most
important tribe in South Africa, but their range extends to China
and other parts of Asia (Satryium). We are using plastid matK
and nuclear ITS sequences to evaluate the monophyly of tribe Diseae
(Orchidaceae). We have includedr 34 Diseae and 24 Orchideae using four
Cranichideae and Diurideae as the outgroups. Results for the plastid
DNA are similar to those from ITS; they show that Diseae are paraphyletic
with respect to Orchidinae, thus supporting the inclusion of all members
of Diseae in the latter. Most of the subtribes of Diseae are monophylectic.
Circumscription of Habenaria and Habenariinae remain problematic.
About
the Author
Tim Fulcher is a bioinformatics officer at RBG Kew for the last 5 years
looking at orchid molecular phylogenies. Prior to this, he was worked
on photosynthetic mechanisms in purple bacteria for 5 years postdoctoral.
ALL ARE WELCOME!
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