Poster Session: Population Genetics-Oomycetes

513-P

The dynamics of evolution in Phytopththora infestans as told by phylogeographical approaches.
J. TABIMA (1), M. Mideros (1), A. Bernal (1), P. Jiménez (2), D. Riaño-Pachón (1), N. Grunwald (3), S. Restrepo (1)
(1) Universidad de Los Andes, Bogotá, Colombia; (2) Universidad Militar Nueva Granada, Bogotá, Colombia; (3) Oregon State University, Corvallis, OR, U.S.A.

The plant pathogens dynamics of dispersion has always been a topic of interest for researchers, due to the impact of plant disease in a newly colonized site. History from the origin of the pathogen to the recent routes of dispersal, of these organisms, has been an unanswered question amongst research. One example of this, is the evolutionary history of Phytophthora infestans, the late blight disease agent of solanaceous plants. This study aim to combining new data analysis techniques, such as the use of six loci of nuclear and mitochondrial genes in a posterior probabilistic framework in order to reconstruct migration history. Thirty-seven P. infestans strains from around the world were used in this approach. Our results indicate rapid dispersal rates, concordant with the low genetic diversity of P. infestans, showing plausible migration due to human mediated practices, and P. infestans multiple dispersion from the Americas throughout the world in independent events.