UVOLOGICAL ASSESSMENT OF TABLE GRAPEVINE VARIETIES IN THE COLLECTION IN 2022

The paper presents the results of a study of the uvological indicators of table grapevine varieties growing on Don ampelographic collection named after Ya.I. Potapenko (Novocherkassk, Rostov region) in 2022. The varieties were studied in grafted culture (rootstock Kober 5BB). Planting scheme was 3.0×1.5 m. The study of grapevine varieties was carried out using methods generally accepted in viticulture and State Standards. The object of the research was 20 table and seedless grapevine varieties of various origin and maturation dates. Very high sugar content of berry juice had the varieties: Einset Seedless (25.4 g/100 cm3) and Nizina (23.5 g/100 cm3). Titrated acidity ranged from 3 g/dm3 (Esenin) to 7.6 g/dm3 (Bogotyanovskij). After taking measurements of bunches and berries, we note that the largest bunches had the varieties: Valentina, Kishmish Uzbekistan, Aku-Aku, Dolchatyj, Roshfor, Vostorg (length from 20.8 to 26.9 cm); the largest berries (in diameter) – Valentina, Bogotyanovskij, Talisman (from 25.3 to 29.5 mm). The highest average berry weight had the varieties ‒ Valentina (11 g), Bogotyanovskij (9.6 g), Talisman (8.9 g), Kardinal Ustojchivyj (8.1 g), Nizina (8.0 g). The following varieties received high degustation ratings: Kardinal Ustojchivyj (8.6 points), Roshfor (8.5 points), Aku-Aku (8.4 points), Talisman (8.1 points), control varieties – Dolchatyj (8.2 points). The lowest tasting rating among table varieties (at the level of 7.0‒7.5 points) had native varieties – Buryj and Efremovskij. Among seedless varieties, the following varieties received high tasting ratings: Kishmish Uzbekistan (8.8 points) and Einset Seedless (8.7 points), which is higher than the control variety Korinka Russkaya (8.3 points). According to the data of the conducted studies, table varieties were identified according to a set of morphological indicators ‒ Kardinal Ustojchivyj, Roshfor, Aku-Aku, Bogotyanovskij, Talisman, Valentina; among the seedless varieties are Kishmish Uzbekistan and Einset Seedless.