Systematics/Phytogeography / Taxonomie/ Section
Georgian, Elizabeth , Porter-Utley, Kristen E. .
A new molecular phylogeny for the apetalous passionflowers (Passiflora subgenus Decaloba supersection Cieca).
A new molecular phylogeny of the closely related species of Passiflora subgenus Decaloba supersection Cieca (Passifloraceae) is presented. Supersection Cieca is a monophyletic group of herbaceous to woody climbers found in subtropical and tropical regions of the world. The 19 species, including two subspecies, recognized here are primarily distributed in the southern United States, MÃ©xico, Central America, South America, and the Caribbean. The species of the supersection are recognized by their small, apetalous, usually greenish flowers with the filaments of the corona mostly in two series. The supersection contains two problematic species complexes, P. suberosa and P. coriacea. Phylogenetic relationships within supersection Cieca have been investigated by means of cladistic analyses of morphological (external morphology) and molecular (nucleotide sequences of ITS-1, ITS-2 and the intervening 5.8S region) characters. Though many clades within the supersection are well-resolved in the analyses of these data, several relationships are poorly resolved. The nuclear-encoded chloroplast-expressed glutamine synthetase gene (ncpGS) is used as an additional data source to further resolve the evolutionary relationships within the supersection. The ncpGS data is analyzed independently and combined with the ITS data to produce a more well-resolved phylogeny of the supersection. The morphological phylogeny is compared to the individual and combined molecular phylogenies.
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1 - Keene State College, Biology, 229 Main St., MS-2001, Keene, NH, 03435-2001, USA
2 - Keene State College, Biology, 229 Main Street, MS-2001, Keene, NH, 03435, USA
Presentation Type: Poster:Posters for Sections
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM