Phylogenetic Split of Malagasy and African Taxa of Protorhus and Rhus (Anacardiaceae) Based on cpDNA trnL–trnF and nrDNA ETS and ITS Sequence Data

Authors: Pell, Susan K.; Mitchell, John D.; Lowry, Porter P.; Randrianasolo, Armand; Urbatsch, Lowell E.

Source: Systematic Botany, Volume 33, Number 2, April-June 2008 , pp. 375-383(9)

Publisher: American Society of Plant Taxonomists

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Abstract:

The African-Malagasy genus Protorhus and the African-Malagasy species of Rhus s.l. have been suggested to be polyphyletic, but definitive evidence has been lacking. We investigated a clade of Anacardiaceae subfamily Anacardioideae in order to clarify evolutionary relationships of the African-Malagasy members of these two genera. Phylogenetic analysis of sequence data from cpDNA trnL–trnF, and nrDNA ETS and ITS provide strong statistical support for the 1) polyphyly of Protorhus; 2) monophyly of Malagasy Protorhus species; 3) polyphyly of Rhus section Baronia (Malagasy Rhus). These results support the need for new circumscriptions of these groups. Two new combinations are proposed, Searsia erosa and Searsia pendulina .

Keywords: "ABRAHAMIA"; BARONIA; MADAGASCAR; PHYLOGENY; POUPARTIOPSIS; SEARSIA

Document Type: Research Article

DOI: http://dx.doi.org/10.1600/036364408784571545

Publication date: April 1, 2008

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