This paper analyses the phytochemical composition, and antioxidant activity of new selected biotypes of cherry silverberry grown in Poland. In addition, the polyphenolic contents, sugars, and vitamin C, as well as organic acid profile were evaluated. Among the researched compounds, two sugars, seven organic acids, and six fatty acids were reported in new studied biotypes of cherry silverberry. Some new biotypes presented a high contents of vitamin C, linoleic, α-linoleic acids (si1, and si2), glucose, fructose, ash (si5, and si4), other fatty acids, organic acids, and antioxidant activity (si0, and si3). They displayed an average contents of polyphenols [5.68 g GAE/100 g dry matter (d.m.)], vitamin C (15.13 mg/100 g), ash (0.56%), fatty acids (89.99%), organic acids (22.41 g/100 g d.m.), sugars (47.96 g/100 g d.m.), and high antioxidant activity of 3.62 mM Trolox (TE)/100 g d.m. (FRAP assay), and 5.11 mM TE/100 g d.m. (DPPH assay). The new biotypes of cherry silverberry cultivated in Poland might be a good source for the production of functional foods, and direct consumption. Moreover, cherry silverberry is an inquisitive material with a different phytochemical components, and according to the principal component analysis, strongly dependent on the biotype.

Elaeagnus multiflora Thunb., also known as “cherry silverberry”, “cherry elaeagnus”, and “goumi” has been used for a long time in traditional Chinese medicine as a phytosterol-rich plant. Today, the fruits of this species are also becoming more popular as a “superfood” in Europe, but the cultivation of these plants is not yet carried out on a large commercial scale. The aim of this study was to evaluate the yield and morphological quality of the fruit of nine E. multiflora biotypes and two cultivars, ‘Jahidka’ and ‘Sweet Scarlet’, to determine their suitability for cultivation in the climatic conditions of Poland. The lowest yields (an average of 0.49 kg per bush) were recorded in 2021. In this year, the fruits of the biotypes and cultivars were distinguished by the highest mean fruit weight, fruit-to-seed weight ratio, and total soluble solids content. Our research shows that due to the greatest weight of fruits, cultivar ‘Jahidka’ and the biotype B11 can be recommended for cultivation in north-eastern Poland. Biotype B11 was distinguished by the highest yield (an average of 4.02 kg per bush). The smallest share of stone in relation to the weight of the fruit was shown for the cultivars ‘Jahidka’, and biotype B4.