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Systematics Section / ASPT

Fearn, Kimberly [1], Garey, James [1], Essig, Frederick B. [1].

Actin intron sequences can determine the hybridization history within Clematis.

Phylogenetic relationships in the large plant genus Clematis (Ranunculaceae) have, thus far, not been fully elucidated. Twelve sections have been proposed; one of those, Viorna, includes members that occur naturally in the southeastern portion of the United States. Efforts have been made to characterize the phylogeny of this section of Clematis using an intron of the DNA marker Actin1 (Act1 intron). The Act1 intron is not highly conserved and, therefore, this marker can improve the resolution of the phylogeny of the Viorna section at the species level. The Act1 intron marker also has potential for characterizing different haplotypes of hybrid species. It is known that many species of Clematis are capable of hybridization, and hybridization may be responsible for some of the speciation in the genus. Preliminary evidence supports this theory; Act1 intron gene sequences of a known cultivated hybrid sort into two groups of differing haplotypes.


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1 - University of South Florida, Department of Biology, Sca 110, 4202 Fowler Avenue, Tampa, Florida, 33620-5150, USA

Keywords:
Clematis
Actin1 intron
hybridization
Phylogeny.

Presentation Type: Oral Paper
Session: 12-1
Location: 410/Hilton
Date: Monday, August 15th, 2005
Time: 12:45 PM
Abstract ID:169


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