Long-term dynamics of chemical structure of berries of blackcurrant (Ribes nigrum L.) for using in selection

The study presents the results of the researches of biochemical composition of berries of Ribes nigrum L. varieties cultivated in the Altay Ob region. The differences in the accumulation of components of biochemical composition are shown. The varieties for selection were taken as the sources of individual economically valuable traits. The content of soluble solids averaged 12.6-15.7 %. The higher content of soluble solids, as compared with the control cultivar Seyanets Golubki (13.7 ±0.49 %) was in the variety Garmoniya - 13.9±0.62 %; Zabava - 13.9±0.77 %; Prestizh - 14.1±0.73 %; Kanahama - 14.3±0.98 % and Lama - 15.7±0.82 %. The maximum content of soluble dry matter was observed in Lama - 19.1 %, the minimum in Mila variety - 8.5 %. The variation coefficient made 3.3-20.4 %. The total sugar content made 7.4-9.9 %. High content of total sugar in comparison with Seyanets Golubki (8.6±0.66 %) was observed in the varieties Garmoniya 9.2±1.19 % and Lama - 9.3±0.78; Zabava - 9.7±0.82; Kanahama - 9.9±1.76 %.The maximum sugar content was observed in Poklon Borisovoi - 13.7 %, minimal was in the variety Nika - 4.3 %. The content of titrated acid in berries was 1.8-3.1 %. The maximum indicator was for Lama variety - 4.2 %, the minimum - for Poklon Borisovoi variety - 0.6 %, Nika and Rita - 0.7 %.The content of ascorbic acid in black currant berries averaged 79.8-140.3 mg/100 g. A higher content of ascorbic acid, compared with the control Seyanets Golubki (109.4±17.87 mg/100 g was present in the variety Galinka - 140.3±26.79 mg/100 g. The maximum content of ascorbic acid was observed in Rita variety - 214.5 mg/100 g, the minimum in Seyanets Golubki variety - 12.9 mg/100 g.