sentences:  Corylus cultivars with the single dominant resistant gene from "Gasaway” may get cankers, but at a low frequency; the cankers may be smaller, and may not produce spores.Some of the cankers will heal over the years, assuming that stromata are destroyed.Some A. anomala strains from East-Northern America can overcome the single dominant resistance gene of these resistant cultivars, indicating that the plant-pathogen interaction is multifaceted.