The study evaluated three biotypes of cherry silverberry (obtained from the Institute for Fruit Growing in Samokhvalovitchy in Belarus) for cultivation under the conditions of north-eastern Poland in comparison to the form reproduced and cultivated at the University of Warmia and Mazury in Olsztyn. It was demonstrated that the natural conditions of Olsztyn permit cultivation of the examined cherry silverberry biotypes, although the yield was not high. The 01-1999 biotype from the Polish selection was characterized by a higher yield and weight of fruit, as well as by a higher fruit weight-to-stone weight ratio in comparison to biotypes selected in Belarus. The fruit of the examined biotypes also significantly differed in their chemical composition. Fruits of the 9-19-1996 biotype were characterized by high dry matter content, low acidity and a high sugar-to-acid ratio. The 9-24-1996 biotype fruits were characterized by the highest content of vitamin C. Both fruits and stones of cherry silverberry contained fat rich in n-3 and n-6 fatty acids. In cherry silverberry fruits, this ratio ranged from 1.2:1 to 1.4:1 in the pulp and from 1.4:1 to 1.8:1 in the stone.
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