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Abstract Detail


MSA - Systematics/Evolution

Blair, Jaime E. [1], Martin, Frank [2], Coffey, Michael [3].

Resolving the phylogeny of Phytophthora infestans and relatives using loci derived from complete genomes.

Phytophthora infestans is a world-wide pathogen that causes significant disease on a number of economically important crops, including many solanaceous species. There are four species closely related to P. infestans, including one (P. andina) of potential hybrid origin. A recent phylogenetic analysis of the entire Phytophthora genus using eight nuclear loci was unable to resolve the relationships among P. infestans and its close relatives. Here we have used complete genome sequences to identify and develop new markers for phylogenetic analysis and population-level studies within this subclade. Eight nuclear and six mitochondrial loci have been sequenced from ~65 isolates. Preliminary results suggest concordance between nuclear and mitochondrial phylogenies. A hybrid origin for P. andina is also suggested, with P. infestans as one parental lineage; the second parental lineage however remains unresolved.


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1 - Franklin & Marshall College, Department of Biology, P.O. Box 3003, Lancaster, Pennsylvania, 17604-3003, USA
2 - Usda-Ars, 1636 East Alisal Street, Salinas, CA, 93905, USA
3 - University of California, Riverside, Plant Pathology and Microbiology, 3206 Webber Hall, Riverside, CA, 92521, USA

Keywords:
Oomycetes
genome
nuclear markers
mitochondrial markers
phylogenetics.

Presentation Type: Oral Paper:Papers for Topics
Session: 45
Location: Cottonwood A/Snowbird Center
Date: Tuesday, July 28th, 2009
Time: 11:00 AM
Number: 45004
Abstract ID:802


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