При поддержке: The authors are grateful to Cand. Sci. (Tech) L.Yu. Novikova for assistance in the statistical analysis of the results. This work was supported by the program Comprehensive Plans of Research, subproject 0481-2018-0023 ‘‘Potato breeding and seed industry in the Russian Federation’’, project ‘‘Federal R&D program of farming industry development in 2017–2025’’. The maintenance of the in vitro potato collection kept in the Shared Access Center ‘‘VIR Collection’’, whose material was used in cryopreservation, was supported by Project 0662-2019-0004.