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Abstract Detail


Systematics Section

Hawkins, Angela K. [1], Randle, Christopher P. [2], Williams, Justin [3], Archambeault, Alan D. [4], Cannon, Brandi C.  [5].

Subspecific classification within Phoradendron serotinum (Santalaceae): Development of microsatellite markers for assessment of population genetic structure.

Phoradendron serotinum, (leafy mistletoe) is a hemi-parasitic plant of the family Santalaceae found in the United States and Mexico. P. serotinum has been divided into four subspecies: subsp. tomentosum, subsp. macrophyllum and subsp. serotinum which occur in the eastern United States from southern New Jersey to southern Florida, through the Midwest south of Oklahoma and into Mexico, and on the west coast from Oregon to Baja California. Subspecies angustifolium grows in isolated regions of central Mexico. Subspecies may be difficult to identify based on morphology alone. Identification of P. serotinum subspecies in eastern Texas is especially difficult as characters that are otherwise diagnostic of subspecies do not adequately separate three of the subspecies(macrophyllum, tomentosum, and serotinum) that overlap in this region. Molecular and morphometric analyses were utilized in conjunction for a total evidence approach to resolve taxonomic confusion within P. serotinum. A subset of 96 samples of total genomic DNA, divided among 10 populations from the entire growth range, was analyzed over 6 microsatellite loci using GENEPOP. Morphometric measurements were recorded from 150 vouchers and analyzed by principal components analyses.

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1 - Sam Houston State University, Department of Biological Sciences, 1900 Avenue I, Huntsville, TX, 77340, USA
2 - Sam Houston State University, Department of Biological Sciences, 1900 Avenue I., Huntsville, TX, 77340
3 - Sam Houston State University, Department of Biological Sciences, Box 2116, Huntsville, Texas, 77341-2116, USA
4 - Sam Houston State University, Department of Biology, 1900 Avenue I, Huntsville, Texas, 77340, USA
5 - Sam Houston State University, Department of Biological Sciences, 1900 Avenue I, Huntsville, TX, 778340, USA

Keywords:
parasitic plants
microsatellites
population genetics
Santalaceae.

Presentation Type: Oral Paper:Papers for Sections
Session: 55
Location: 554/Convention Center
Date: Wednesday, August 4th, 2010
Time: 1:00 PM
Number: 55001
Abstract ID:460


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