The phylogenetic position of east Asian Sedum species (Crassulaceae) based on chloroplast DNA trnL (UAA)-trnF (GAA) intergenic spacer sequence variation

Phylogenetic relationships of 27 Crassulaceae species, including a broad sample of 19 Sedum species, were inferred from sequence variation of the chloroplast trnL (UAA)-tmF (GAA) intergenic spacer to assess the position of alkaloid containing Asian Sedum species. The overall topology of the phylogeny fully agrees with results based on chloroplast DNA restriction-site variation. The five alkaloidal, Asian Sedum species are included in the Acre lineage. These results support Steven's and co-workers (1995) hypothesis on the distribution of alkaloids in the Crassulaceae which states that the occurrence of alkaloids is restricted to the species of the Acre lineage. Although monophyly of the Acre lineage is strongly supported, relationships within this clade are only partially resolved, probably as a result of incomplete systematic sampling.