Systematics Section / ASPT
Wada, Eric , Potter, Daniel , Walker, M. Andrew .
A Combined Molecular and Morphological Study of the Species of Vitis (Vitaceae) of the Western United States.
Vitis californica (Benth.) and V. girdiana (Munson) are the two non-cultivated species of wild grape that occur in the far western continental United States. The two species are most easily distinguished by their geographic range. Prior studies suggest the possibility of hybridization between the two species as an explanation for their clinal morphological variation. To clarify the species boundaries and estimate the rate of hybridization between the two species we collected individuals from wild populations in the western United States. The populations sampled represent the extremities of the speciesí ranges as well as areas where species might come into secondary contact to form hybrids. Here we present findings from nuclear ribosomal DNA sequences and 12 microsatellite markers that will be correlated to the morphological data to identify stable morphological markers. To investigate the taxonomic status of both species, these same data will be compared to a more comprehensive sampling of species distributed throughout the United States.
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1 - University of California Davis, Department of Viticulture & Enology, One Shields Avenue, Davis, California, 95616, USA
2 - University of California, Davis, Department of Plant Sciences, Mail Stop 2, One Shields Avenue, Davis, CA, 95616, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Stevens 3/Hilton
Date: Wednesday, July 11th, 2007
Time: 2:30 PM