Phytophthora ramorum, the causal agent of sudden oak death and ramorum blight, is known to exist ... more Phytophthora ramorum, the causal agent of sudden oak death and ramorum blight, is known to exist as three distinct clonal lineages which can only be distinguished by performing molecular marker-based analyses. However, in the recent literature there exists no consensus on naming of these lineages. Here we propose a system for naming clonal lineages of P. ramorum based on a
In 2003, isolates belonging to the Al mating type were reported from commercial nurseries in Oreg... more In 2003, isolates belonging to the Al mating type were reported from commercial nurseries in Oregon. Soon thereafter, we reported the presence of both mating types of P. ramorum in nurseries in Washington. AFLP, microsatellite, and RFLP of the Cox I region indicated the Al isolates belonged to the European (E.U.) lineage of P. ramorum. In 2003, 33 percent of the isolates analyzed belonged to European lineage, while the rest belonged to the North American (N.A.) lineage. Isolates belonging to the two lineages were found in the same block of plants, and even on adjacent plants. By using tester strains (A2 from California and Al from Oregon nurseries) we confirmed that all North American isolates belonged to the A2 mating type, and all of the European isolates belonged to the Al mating type. The coexistence of both mating types on adjacent plants increases the chances for sexual recombination between these two genetically divergent lineages. Crosses with tester strains were 100 percent...
Phytophthora ramorum, the causal agent of sudden oak death and ramorum blight, is known to exist ... more Phytophthora ramorum, the causal agent of sudden oak death and ramorum blight, is known to exist as three distinct clonal lineages which can only be distinguished by performing molecular marker-based analyses. However, in the recent literature there exists no consensus on naming of these lineages. Here we propose a system for naming clonal lineages of P. ramorum based on a
In 2003, isolates belonging to the Al mating type were reported from commercial nurseries in Oreg... more In 2003, isolates belonging to the Al mating type were reported from commercial nurseries in Oregon. Soon thereafter, we reported the presence of both mating types of P. ramorum in nurseries in Washington. AFLP, microsatellite, and RFLP of the Cox I region indicated the Al isolates belonged to the European (E.U.) lineage of P. ramorum. In 2003, 33 percent of the isolates analyzed belonged to European lineage, while the rest belonged to the North American (N.A.) lineage. Isolates belonging to the two lineages were found in the same block of plants, and even on adjacent plants. By using tester strains (A2 from California and Al from Oregon nurseries) we confirmed that all North American isolates belonged to the A2 mating type, and all of the European isolates belonged to the Al mating type. The coexistence of both mating types on adjacent plants increases the chances for sexual recombination between these two genetically divergent lineages. Crosses with tester strains were 100 percent...
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Papers by M. Garbelotto