Systematics/Phytogeography / Taxonomie/ Section
Furches, M. Steven , Small, Randall .
Assessment of chloroplast variation in Sarracenia in the southeastern United States.
Sarracenia is genus of rhizomatous, perennial herbs centered in the southeastern United States with one species extending into New England and Canada. They are primarily found in sphagnous bogs, mountain seeps, and longleaf pine savannas. The group has long been popular in cultivation due to their carnivorous habit and ability to form complex hybrids. Extensive hybridization combined with morphological variation has led to conflicting taxonomies within the genus, consisting of eight to eleven species and numerous subspecies and varieties. Many taxa described and named as species were later discovered to be hybrids and nearly every pair of species that exists in close proximity in nature has been found to hybridize. While several attempts have been made using traditional morphological characters, flavonoids, petal extract chromatography, and DNA-based methods, relationships within Sarracenia have yet to be fully resolved. In order to better understand relationships within the genus we examined multiple individuals from eight species in ten populations using three non-coding chloroplast regions. While chloroplast variation exists, there was neither a taxonomic pattern among the three haplotypes nor a discernable geographic pattern. Haplotype A was found in five species in all ten populations, while haplotype B was found in four species in two populations. Haplotype C was restricted to a single species in a single population. Future work using AFLPs may help clarify relationships within this fascinating group.
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1 - University of Tennessee, Department of Ecology and Evolutionary Biology, 442 Hesler Biology, Knoxville, Tennesee, 37996, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Room 3/Woodward
Date: Monday, July 28th, 2008
Time: 4:00 PM