Isolation and study of grape variety barhatnyj promising protoclones

The paper presents the preliminary results of clonal breeding of the technical grape variety Barhatnyj. 10 clone forms of this variety were identified. The study of the mechanical composition of their bunches and berries and the main biochemical parameters was carried out. The Barhatnyj grape variety is valued for its high-quality dessert wine. This variety is prone to pea and weakly resistant to fungal diseases. Therefore, it became necessary to improve Barhatnyj variety, namely, to isolate its clones, visually healthy, high-yielding, with evenly formed berries and clusters. For three years (2020-2022), plantations of this variety were studied in the amount of 480 bushes growing on the ampelographic collection of the Anapa Zonal Experimental Station of Viticulture and Winemaking - a branch of the North Caucasus Federal Scientific Center for Horticulture, Viticulture and Winemaking (AZOSViV - a branch of the Federal State Budgetary Scientific Institution NCFSCHVW). Biochemical studies were carried out at the Center for Collective Use "Instrument-analytical" of the Federal State Budgetary Scientific Institution NCFSCHVW for the content of sugars, titratable acids, organic acids, phenolic and nitrogenous substances, cations in the wort. Analysis of the main indicators was carried out in comparison with the control form of the Barhatnyj variety, which has typical bushes with average annual agrobiological, uvological and biochemical indicators. The ultimate goal is to develop new sustainable and high-tech grape varieties and further recommend bringing them into production. As a result of research, it was found that the clones under study have annual stable indicators of yield and sugar accumulation. The investigated clone forms are much superior to the control form in the mechanical composition of the bunches, especially the ratios of ridges and berries, juice and dense parts of the pulp. The studied forms are promising, which will make it possible to obtain new varieties from them that are more resistant to major pests and diseases with high-quality final products.