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

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-Malagas...

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Bibliographic Details
Published inSystematic botany Vol. 33; no. 2; pp. 375 - 383
Main Authors Pell, S.K, Mitchell, J.D, Lowry, P.P. II, Randrianasolo, A, Urbatsch, L.E
Format Journal Article
LanguageEnglish
Published 01.04.2008
Subjects
Anacardiaceae
Baronia
chloroplast DNA
evolution
internal transcribed spacers
new combination
phylogeny
Protorhus
Rhus
ribosomal DNA
Searsia pendulina
Madagascar
Africa
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Summary: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.
ISSN:0363-6445
1548-2324
DOI:10.1600/036364408784571545