Identification of resistance donors for fire blight in Mains

摘要

Fire blight is a dangerous disease in pome fruit production. The cultivation of resistant apple varietiescan prevent losses caused by Erwinia amylovora thereby avoiding spraying of chemicals. Some resistantvarieties (eg. 'Reandal 'Remol 'Rewena") were bred at Dresden-Pillnitz. The donor of resistance wasMalus x floribunda. To enlarge the genetic basis of resistance to fire blight, a wide range of accessions ofwild species, present in the gene bank in Dresden-Pillnitz, was tested for resistance to fire blight in thegreenhouse. Some accessions were tested up to 14 times in the last 14 years to find durable resistancedonors independent of the E. amylovora strain used.