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Abstract Detail

Systematics Section / ASPT

Duangjai, Sutee [1], Wallnoefer, Bruno [2], Samuel, Rosabelle [3], Munzinger, Jérôme [4], Chase, Mark W. [5].

Phylogenetic relationships and infrafamilial classification of Ebenaceae s.l. based on six plastid markers.

THE Ebenaceae s.l. (including Lissocarpa) consists of 500 – 600 species that are mostly pantropical tree and shrubs. Previous infrafamilial classifications based on morphological and anatomical characters of Ebenaceae s.l. has been considered to be problematic, at least some of these circumscriptions can not reflect natural groups. We used maximum parsimony analysis of six plastid sequence data, atpB, ndhF, matK, trnK intron, trnL intron, and trnL – trnF spacer, to examine phylogenetic relationships and delimit generic boundaries of Ebenaceae s.l. ,. We sampled 100 species of Ebenaceae s.l. including all currently recognized genera: Diospyros, Euclea, Lissocarpa, as well as problematic taxa that were previously recognized at the generic level, such as Cagillia, Gunisanthus, Maba, Royena and Tetraclis. Our results clearly show Ebenaceae s.l. are monophyletic and split into two major groups correspond to subfamily Lissocarpoideae and subfamily Ebenoideae. Molecular markers confirm the generic status of Lissocarpa, Euclea, Royena, and Diospyros, the other remaining genera are embedded within genus Diospyros. The South American genus Lissocarpa, (subfamily Lissocarpoideae) is sister to remaining three genera of subfamily Ebenoideae. Within the latter subfamily, two genera Euclea and Royena that restrict to Africa and Arabia are sister to diverse pantropical genus Diospyros. There are three major lineages within genus Diospyros, the first lineage correspond to subgenusHierniodendron sensu Bakhuizen, the second lineage is Diospyros subgenus Cargillia sensu Bakhuizen and two New Caledonian species, and the last lineage contains all remaining taxa. Within the last lineage, there are nine well supported clades but relationships among these clades remain unresolved. Previous infrageneric classifications (Candolle, 1844; Hiern, 1873; Bakhuizen, 1936 – 1955; White, 1980) are not supported by our results.

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1 - University of Vienna, Department of Systematics and Evolutionary Botany, Rennweg 14, Vienna, A1030, Austria
2 - Natural History Museum Wien, Botany, Burging 7, Vienna, A1014, Austria
3 - University of Vienna, Institute for Botany, Dept. of Higher Plant Systematics and Evolution, Rennweg 14, Vienna, A-1030, Austria
4 - Institute de Recherche pour le Dévelopement, B.P. A5, 98848, Nouméa Cedex, , Nouvelle-Calé:donie
5 - Royal Botanic Gardens, Kew, Jodrell Laboratory, Richmond, Surrey, TW9 3AB, United Kingdom

infrafamilial classification
phylogenetic relationships
trnK intron
generic delimitation.

Presentation Type: Oral Paper:Papers for Sections
Session: 51-6
Location: 120/Ayres
Date: Tuesday, August 1st, 2006
Time: 3:15 PM
Abstract ID:180

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