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Polyphyly of Polycarpon (Caryophyllaceae) inferred from DNA sequence data
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
2007 (English)In: Taxon, ISSN 0040-0262, E-ISSN 1996-8175, Vol. 56, no 3, 775-782 p.Article in journal (Refereed) Published
Abstract [en]

A phylogenetic study of the genus Polycarpon was made using DNA sequence data from the chloroplast rpsl6 intron and nuclear RPB2 regions. Polycarpon as currently recognised is shown to be polyphyletic. The South American species P. coquimbense and P. suffruticosum are more closely related to Haya obovata (Socotra) and Polycarpaea spicata (paleotropical) than to the remaining species of Polycarpon, and the widespread tropical species P. prostratum is nested with Macaronesian species of Polycarpaea. All three should therefore be excluded from Polycarpon. The remaining species, the P. tetraphyllum group, has its main diversity in the Mediterranean region. It is a polyploid complex with morphologically very similar taxa mostly separated only by partially overlapping characters. The members of this group form a strongly supported, but largely unresolved clade. It is proposed that they are all included in a widely circumscribed P. tetraphyllum. The dehiscence of the capsules in P. tetraphyllum, by valves that elastically roll inwards and finally throw out the seeds, is unique in Caryophyllaceae and provides a strong synapomorphy for Polycarpon in this new restricted sense.

Place, publisher, year, edition, pages
2007. Vol. 56, no 3, 775-782 p.
Keyword [en]
Caryophyllaceae, molecular phylogenetics, Paronychioideae, Polycarpon, RPB2, rps16, seed dispersal
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-13991ISI: 000249247400014OAI: oai:DiVA.org:uu-13991DiVA: diva2:41761
Available from: 2008-01-28 Created: 2008-01-28 Last updated: 2017-12-11Bibliographically approved

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