Diseases
Fire blight of apple
Malus domestica (Suckow) Borkh.
The most dangerous bacterial disease of apple trees is fire blight, caused by the Gram-negative bacterium Erwinia amylovora, which affects all above-ground organs of the tree.
In the reference 398 varieties crop Apple, where this is mentioned in the description.
The pathogen Erwinia amylovora is characterized by strain variability and adaptability. It infects flowers, causing them to blacken and wilt, as well as young shoots, the tips of which characteristically curl into a 'shepherd's crook' shape. The leaves exhibit a 'scorched by fire' effect on the canopy, and under high humidity, a characteristic amber or brown exudate is secreted on affected branches and bark.
In apple breeding for fire blight resistance, the primary tool is the identification and use of quantitative trait loci (QTLs), such as QTL FBF7. For the selection of resistant genotypes, molecular markers are employed, including the SCAR and microsatellite markers AE10-375, GE-8019, and CH-F7-FB1.
General information about the subject — on the page Bacterial diseases.
Varieties of Apple mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
No varieties yet.