TY - JOUR AU - Brasier, Clive M. AB - A Ar rt ticles icles Rapid Evolution of Introduced Plant Pathogens via Interspecific Hybridization CLIVE M. BRASIER lant disease epidemics resulting from introduction HYBRIDIZATION IS LEADING TO RAPID Pof exotic fungal pathogens are a well-known phenom- EVOLUTION OF DUTCH ELM DISEASE AND enon. Limited resistance in the host and excessive aggres- siveness in the pathogen (reflecting their lack of prior co- OTHER FUNGAL PLANT PATHOGENS evolution) can result in an explosive outbreak of disease. Introduction events also present a window of evolutionary op- portunity for the pathogen. In its endemic location, a plant pathogen tends to be subject to routine selection constraints, Dutch elm disease (so called because the early seminal re- favoring maintenance of a relatively stable, if fluctuating, search was in The Netherlands [Holmes and Heybroek population structure over time. When introduced into a new 1990]) is the elm’s main enemy. It is a wilt disease, caused environment, it will often be subject to novel or episodic se- by ascomycete fungi of the genus Ophiostoma, that spreads lection, reflecting sudden exposure to new biotic and abiotic within the tree’s vascular system. The pathogens are trans- influences, such as a new host population, new vectors, new mitted from TI - Rapid Evolution of Introduced Plant Pathogens via Interspecific Hybridization JF - BioScience DO - 10.1641/0006-3568(2001)051[0123:REOIPP]2.0.CO;2 DA - 2001-02-01 UR - https://www.deepdyve.com/lp/oxford-university-press/rapid-evolution-of-introduced-plant-pathogens-via-interspecific-MS5xGwZf66 SP - 123 EP - 133 VL - 51 IS - 2 DP - DeepDyve ER -