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Title:   Author  item
                                            PROSPERO, S - SWISS FEDERAL INSTITUTEitem
                                            BRITT, J - OREGON STATE UNIVERSITYitem
                                            Grunwald, Niklaus

                                                         - *Nik*item
                                            HANSEN, E - OREGON STATE UNIVERSITY
  Submitted to: Sudden Oak Death Science Symposium
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 9/12/2007
                                    Publication  Date: 3/15/2008
                                    Citation: Prospero, S., Britt, J., Grunwald, N.J., Hansen, E.M. 2008. Population Structure of Phytophthora ramorum in Oregon. Proceedings of the Sudden Oak Death Science Symposium. p. 239-242.Interpretive Summary:
                                Technical Abstract: Phytophthora ramorum is infecting plants in Oregon forests and nurseries. In this study, we analyzed the population structure of P. ramorum in Oregon from 2001 to 2004, using microsatellites. The P. ramorum population in Oregon is characterized by low genetic
diversity, significant genetic differences between nursery and forest populations, and no evidence of sexual recombination. The forest population is dominated by a single multilocus genotype in all four years, indicating the persistence of pathogen inoculum. In nurseries, identical genotypes were not recovered during both sampling years (2003 and 2004), suggesting pathogen eradication was effective. This research highlights the continued importance of sanitation and quarantine in nursery production to prevent further introduction and spread of P. ramorum.


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