It is known that biotechnological processes based on the possibilities of in vitro cultivati-on of plants offer new opportunities for the diversification of genetic variability, which allows the complex use of classical and modern methods in plant breeding. The plants regenerated by callus cultures are distinguished from the original forms by various qualitative and quantitative traits, including those of important economic interest. Research for identification of factors that induce somaclonal variations attests the dependence of their occurrence on the genetic heterogeneity of the somatic cells of the initial explants, the genetic and epigenetic variability generated by the in vitro culture conditions and genotype [1, 3]. The use of phytopathogenic viruses based on different cytopathic systems in combination with other sources of variation is of major importance for obtaining and selecting genotypes with valuable properties, including increased defensive potential to viral agents [2, 4].