Adaptive differences between Phytophthora ramorum isolates from Europe and North America: evidence for separate subspecies?

Abstract

The comparative risk to trees posed by European (E.U.) versus North American (U.S.) isolates of Phytophthora ramorum, the possible risk posed by genetic recombination between them, and whether European versus North American isolates represented discrete sub-populations was investigated. Population samples of E.U. and U.S. isolates were compared for growth rate across different environments (gene x environment tests), phenotypic stability, host range, pathogenic aggressiveness and sexual behaviour.

Parent Publication

• Proceedings of the sudden oak death second science symposium: the state of our knowledge

Citation

Brasier, Clive; Kirk, Susan; Rose, Joan. 2006. Adaptive differences between Phytophthora ramorum isolates from Europe and North America: evidence for separate subspecies?. In: Frankel, Susan J.; Shea, Patrick J.; and Haverty, Michael I., tech. coords. Proceedings of the sudden oak death second science symposium: the state of our knowledge. Gen. Tech. Rep. PSW-GTR-196. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 101-103