Changes in the phenolic complex of red aboriginal grape varieties in the system “grapes – base wine sparkling wine”

Due to the increased consumer interest in domestic wine products, winemaking enterprises are paying special attention to the use of aboriginal grape varieties now, in order to give products with distinctive characteristics, enabling to take the rightful place in wine market. However, there is no sufficient information about changes in the phenolic complex of grapes in the process of producing sparkling wines from red aboriginal varieties. The phenolic complex of grapes, base wines and sparkling wines produced from them was assessed, followed by the correlation established between the content of total phenolic, including coloring, substances in base wines and sparkling wines with their initial content and macerating (extracting) ability of these grape components, with corresponding correlation coefficients, which can be used for targeted regulation of accumulating these components.