Broecker, Lauren , Albrecht, Matthew , Romero Hernandez, Carolina , Miller, Allison .
Conservation Genetics of Geocarpon minimum.
Intraspecific genetic variation provides the foundation for species to respond to changes in the environment, and empirical studies have shown that decreased levels of intraspecific genetic variation are correlated with greater extinction risk. Geocarpon minimum, an endangered plant species native to the central Midwest (Arkansas, Louisiana, Missouri, and Texas), is listed under the Endangered Species Act. As the only species in the genus, G. minimum is considered a relict species, one that was once widespread in North America but whose distribution has become smaller over time due to changing climate and habitat. In this study, we characterized the amount and structure of genetic variation in14 G. minimum populations using amplified fragment length polymorphisms (aflps). Three primer pairs yielded 237 fragments which were used to estimate genetic variation within and among populations. The resulting data revealed that G. minimum populations harbor low levels of genetic variation. The three most genetically depauperate populations were collected on Bona Glade MO (MOBG), Halltown Glade MO (MOHG), and Truman Lake MO (MOTL). Further, G. minimum populations exhibited substantial population structure (GST-B = 0.43). These data will be used by the United States Fish and Wildlife Service to refine conservation strategies for G. minimum.
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1 - Saint Louis University, Biology, 3507 Laclede Avenue, St. Louis, MO, 63103, USA
2 - Missouri Botanical Garden, P.O. Box 299, St. Louis, MO, 63166, USA
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Presentation Type: Poster:Posters for Topics
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM