Abstract
Female varieties of <em>Fragaria X ananassa</em> (Sonja, Freja, Mieze Schilndler, Dir. Wallbaum, Reine des Precoces, Pozdnaya Slodkaya and others) and, tentatively, one female clone, <em>F. virginiana</em> "Scheldon", were pollinated with nineteen <em>Potentilla</em> species in the course of four years (1977-1980). A total of 99194 seeds was obtained, and from them, 739 seedlings (0.75%). After the first year of growth, a mean 24% of seedlings survived (178) Vegetatively mature plants were obtained from the above named octoploid maternal forms (Reine des Precoces excepted) with six <em>Potentilla</em> species (the diploid <em>P. rupestris, P. purpureoides, P. geoides, P. glandulosa</em> and <em>P. fruticosa</em> as well as the hexaploid <em>P. fragiformis</em>). <em>F. X ananassa</em> var. Sonja X <em>P. rupestris</em> was classified as the best combination in producing surviving plants.
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