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Origin of the cyathium-bearing Euphorbieae (Euphorbiaceae): phylogenetic study based on morphological characters
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Pharmacognosy.
2002 (English)In: Botanical bulletin of Academia Sinica, ISSN 0006-8063, Vol. 43, no 1, 57-62 p.Article in journal (Refereed) Published
Abstract [en]

A cladistic analysis of the subfamily Euphorbioideae was undertaken to elucidate the origin of the cyathium-bearing Euphorbieae and to provide hypotheses about evolutionary relationships within the subfamily. Twenty-one species representing most of the genera within the study group and three outgroup taxa from the subfamilies Acalyphoideae and Crotonoideae were selected for parsimony analysis. An unweighted parsimony analysis of 24 morphological characters resulted in five equally parsimonious trees with consistency indices of 0.67 and tree lengths of 39 steps. The strict consensus tree supported monophyly of the cyathium-bearing Euphorbieae. The sister group relationships of cyathium bearing Euphorbieae with Maprounea (subtribe Hippomaninae) were supported weakly, and the origin of cyathium is possibly in Hippomaneae, or in the common ancestor of Euphorbieae and remaining taxa of Euphorbioideae plus Acalyphoideae. Within the tribe Euphorbieae, both subtribes Euphorbiinae and Neoguilauminiinae are monophyletic, but the African endemic subtribe Anthosteminae is unresolved. The resulting trees support the monophyly of the tribe Stomatocalyceae while the tribe Hippomaneae does not consistently form a clade.

Place, publisher, year, edition, pages
2002. Vol. 43, no 1, 57-62 p.
Keyword [en]
Cyathium, Euphorbieae, Phylogeny
National Category
Pharmaceutical Sciences Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-64182ISI: 000175491100006OAI: oai:DiVA.org:uu-64182DiVA: diva2:92093
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2012-03-22Bibliographically approved

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Backlund, Anders

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