Distribution of powdery mildew resistance genes in the Kazakhstan apple cultivar collection.

The monogenic resistance to powdery mildew (caused by Podosphaera leucotricha) of apple trees is crucial when selecting them. DNA markers allow it to differentiate apple cultivars by individual resistance traits and determine prospective genotypes with high reliability. The presented research determines the results of molecular genetics and phytopathological analyses of apple cultivars on loci Pl-2, Pl-1, Pl-w, and Pl-d for reactions to powdery mildew.