картофельная цистообразующая нематода, молекулярные маркеры, гены устойчивости, маркер опосредованная селекция (мос), potato cyst nematode, molecular markers, resistance gene, marker-mediated breeding, Biotechnology, TP248.13-248.65, Botany, QK1-989

The article presents the results of the application of molecular markers of the genes controlling resistance to potato cyst nematode in different stages of potato breeding - for screening genetic collections and promising hybrids of the All-Russian Institute of Potato Research and the Vavilov Institute of Plant Genetic Resources. It has been established that "pseudopositive" and "pseudonegative" results of a marker-mediated breeding process are associated not only with the specificity of the used markers, but with a lack of objectivity in phenotypic evaluation for resistance to the nematode.