The research was to detennine the method for producing diploid (2n=2x) potato plants through parthenogenesis by crossing the tetraploid Solanum tuberosum (2n=4x) and the wild-type potato Solanum phureja. The materials which were used in this research, the S. tuberosum cultivars Fasan, Caruso, Margit, Omega, Pallina as the pollen receiver and the S. phureja (GLWKS32508) as the pollen giver, were provided by the Julius Kuhn Institute of the Federal Republic of Gennany. The results showed that the conditions in which the mother plants were grown had significant effects on the production of hybrid fruits and seeds. The plants which were prevented from fonning potato tubers led to best results. Direct pollination of the potato stem carrying flowers growth in nutrient medium also led to better hybridization results than pollination of plants growth in nonnal conditions (without the restriction of producing tubers). The ploidy of the hybrid progenies was detennined by flow cytometry. The results indicated the most important role of the mother plants (the pollen receiver) in the reduction of the ploidy of the hybrid progenies. The progenies of the cultivar Omega were 100 percent diploid, while 100 percent of the hybrid progenies of the cultivars Caruso and Pallina with S. phureja were triploid (3x). The crosses between the cultivar Margit and Fasan with S. phureja provide the percentage of diploid progenies of 50 percent and 75 percent, respectively.