Systematics/Phytogeography / Taxonomie/ Section
Duangjai, Sutee , Samuel, Rosabelle , Wallnoefer, Bruno , Munzinger, Jérôme , Yakandawela, Deepthi , Chase, Mark W. .
A phylogenetic framework for infrageneric classification of Diospyros (Ebenaceae) with an emphasis on a radiation of species in New Caledonia.
Diospyros contains more than 500 species distributed in tropics and subtropics. Phylogenetic analysis based on combined data of eight plastid coding and noncoding regions conflicts with morphology-based classifications that previously recognized other genera of Ebenaceae such as Cargillia, Gunisanthus, Maba, Macreightia and Tetraclis; these are embedded within genus Diospyros. There are eleven major clades within Diospyros, and most of them show intercontinental disjunctions, indicating a great deal of dispersal in the history of Diospyros, which argues against regional treatments without taking a global perspective into consideration. Molecular data suggest four origins of the endemic New Caledonian species. The combination of molecular data, fossil evidence and paleogeologic reconstruction indicates that one lineage is paleoendemic and closely related to Australian species. The other three lineages are neoendemics and more closely related to different groups of Southeast Asian species. Further investigation into species delimitation, speciation patterns, biodiversity, and conservation are in progress.
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1 - Kasetsart University, Department of Forest Biology, Faculty of Forestry, Chatuchak, Bangkok, Thailand
2 - University of Vienna, Faculty Center Botany, Dept. of Systematic and Evolutionary Botany, Rennweg 14, Vienna, A-1030, Austria
3 - Natural History Museum Wien, Botany, Burging 7, Vienna, A1014, Austria
4 - Institute de Recherche pour le Dévelopement, B.P. A5, 98848, Nouméa Cedex, Nouvelle-Calé:donie
5 - University of Peradeniya, Department of Botany , faculty of Science, Peradeniya, Sri Lanka
6 - Royal Botanic Gardens, Kew, Jodrell Laboratory, Richmond, Surrey, TW9 3AB, United Kingdom
Presentation Type: Oral Paper:Papers for Sections
Location: Room 3/Woodward
Date: Monday, July 28th, 2008
Time: 3:45 PM