STUDY OF AUTOCHTHONIC DON GRAPEVINE VARIETIES ON THE COLLECTION IN 2022

The results of observations and studies of autochthonous Don varieties in 2022 at the Don ampelographic collection named after Ya.I. Potapenko (Novocherkassk, Rostov region). Varieties were studied in grafted, covered culture. The object of research were 20 grapevine varieties of different directions of use and maturation. Most of the studied varieties (80 %) had more than 60 % bud break. The percentage of fruit bearing shoots varied over a wide range, from 26.8 % (Krestovsky) to 93.1 % (Durman). The highest average bunch weight had varieties − Krestovsky (456 g) and Kumshatsky Belyj (429 g). The yield varied from 1.9 kg/bush (Krestovsky) to 11.4−11.6 kg/bush (Silnyak and Shilohvosty). Most of the studied varieties (11 out of 20) had a high or very high calculated yield (from 130 c/ha and more). Very high sugar content in berry juice had 3 varieties (Krasnostop Zolotovsky, Shampanchik Tsimlyansky and Varyushkin), 5 varieties had high sugar content, 9 − medium, 2 − low and 1 had very low. One variety − Shampanchik-2 had a very high titratable acidity (15.8 g/dm3). High titratable acidity was noted in 4 varieties, the majority of varieties (55 %) had an average titratable acidity (from 7 to 9 g/dm3). According to the results of the studies, it can be tentatively identified that technical and universal varieties with white berries: Bessergenevsky-10, Kosorotovsky, Durman, Kumshatsky Belyj, Sibirkovyj, and variety with colored berries – Varyushkin are promising in terms of yield and quality of grapes for winemaking. These varieties are of early-middle and medium-late ripening, which is very important for the zone of the northern industrial viticulture of the Russian Federation. Research in this direction will be continued.