Variety studying rare native Don grape varieties

The purpose of research is the agrobiological and technological study of the rare native Don technical grape varieties, the selection of the most productive of them with high technological potential. The studies were carried out in 2016-2020. The object of the study is 6 rare native Don varieties: Belobulany, Bessergenevsky-7, Durman, Kosorotovsky, Makhrovatchik, Neizvestny Donskoy. The control variant is the European Rhine Riesling used for quality winemaking. The work was carried out on the collection of ARRIV&W named after Ya.I. Potapenko. Vineyards grafted with shelter bushes for the winter. The data of meteorological conditions of research are analyzed. The analysis of agrobiological indicators, assessment of yield and its quality is given, chemical indicators of wine materials are determined, sensory analysis of experimental samples of wines is carried out, their qualitative and quantitative assessment is given. The percentage of preserved eyes in the covering shaft of the studied varieties ranged from 60 % for the Kosorotovsky variety to 76.3 % for the Neizvestny Donskoy variety. With very high and high estimated yields, the following varieties stood out: Belobulany (196 t/ha), Bessergenevsky-7 (192 t/ha), Makhrovatchik (141 t/ha) and Durman (126 t/ha). The highest sugar accumulation was observed in varieties: Durman - 21.2 g/100 cm3, Kosorotovsky - 20.5, Neizvestny Donskoy - 20.0 and the control variety Riesling Rhine - 20.9 g/100 cm3. The quality of wine from the Belobulanyi variety (8.8 points) was not inferior to the control Riesling Rhine variety, the varieties Kosorotovsky and Makhrovatchik were slightly inferior (8.7 points). The rare aboriginal Don varieties - Belobulany and Makhrovatchik - are singled out as promising in terms of the quality of wine products in combination with high yields.