Feldenkris, Emily , Broe, Michael , Freudenstein, John .
A mitochondrial DNA and combined evidence analysis of relationships at the base of Ericaceae.
As part of a comprehensive study to resolve relationships among the earliest diverging lineages at the base of Ericaceae, sequences from introns in two mitochondrial NADH dehydrogenase gene subunits, nad1 and nad5, were analyzed using parsimony and likelihood approaches. These loci were analyzed individually and combined, as well as in combination with nuclear ITS-26S sequences and morphology. The pyroloids, monotropoids,and arbutoids are each resolved as monophyletic groups. Monotropoids and arbutoids are resolved as sisters, with the majority of Ericaceae sister to them. Pyroloids are then sister to that assemblage, with Enkianthus falling at the base of the tree. This analysis lends further support to the dissociation of monotropoids and pyroloids into their own subfamilies and suggests that the tendency toward extreme mycotrophy found in these groups and indicated by their highly reduced seeds, has evolved in parallel. Substantial structure is present within each of these clades, elucidating character evolution and suggesting a basis for taxonomic revision in particular among monotropoids.
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1 - The Ohio State University Herbarium, Evolution, Ecology and Organismal Biology, 1315 Kinnear Rd., Columbus, OH, 43212, USA
2 - The Ohio State University Herbarium, Evolution, Ecology and Organismal Biology, 1315 Kinnear Rd, Columbus, OH, 43212, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Lindell B/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 3:45 PM