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Abstract Detail


Conservation Biology

Gitzendanner, Matthew A. [1], Patricia, Soria [2], Germain-Aubrey, Charlotte [3], Weekley, Carl W. [4], Menges, E.S. [4], Soltis, Douglas E. [1], Soltis, Pamela S. [5].

Conservation genetics of Crotalaria avonensis (Fabaceae), an endangered endemic from the Lake Wales Ridge, FL, USA.

We studied genetic variation in Crotalaria avonensis, one of a suite of plants narrowly endemic to Florida scrub on the Lake Wales Ridge, FL, USA. Variations in the extent and isolation of Florida uplands over geological time may be the cause of high rates of endemism, but current rapid and extensive habitat loss may also be affecting patterns of genetic variation. Previous work on Lake Wales Ridge endemics has shown low levels of genetic variation and variable differentiation among populations. One such endemic, Crotalaria avonensis (Fabaceae), is a federally listed endangered species known from only three populations within a narrow geographic area. We have developed a set of microsatellite loci and used these to investigate the genetics of C. avonensis populations. Four polymorphic microsatellite loci have been genotyped in 300 individuals, revealing 19-28 alleles per locus. Analyses of population structure show little genetic differentiation among the three populations. In addition, our genetic data indicate that C. avonensis is tetraploid, possibly autopolyploid. The lack of population differentiation may be an argument for using material from multiple sources in the creation of additional populations.


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1 - University of Florida, Department of Botany, 220 Bartram Hall, P.O. Box 118526, Gainesville, Florida, 32611-8526, USA
2 - University of Florida, Department of Botany, Gainesville, FL, 32611, USA
3 - University of Florida, Department of Botany, Florida Museum of Natural History, Dicksinson Hall. Museum Road, Gainesville, Fl, 32611, USA
4 - Archbold Biological Station, Plant Ecology Lab, P.O. Box 2057, Lake Placid, Florida, 33862, USA
5 - University of Florida, Florida Museum of Natural History, PO Box 117800, Gainesville, FL, 32611-7800, USA

Keywords:
population genetics
microsatellites
polyploidy
Endangered species.

Presentation Type: Oral Paper:Papers for Topics
Session: 27
Location: 211/SUB
Date: Monday, July 28th, 2008
Time: 4:00 PM
Number: 27002
Abstract ID:659


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