Abstract
The study was carried out in All-Russian research Institute of viticulture and winemaking named after Y. I. Potapenko (Novocherkassk). In order to determine the optimal phenotypic parameters that characterize the compatibility of explants in the production of grafted seedlings varieties with a low degree of rooting were used – Fioletoviy Ranniy, Golubok and rootstock varieties included in the State register of varieties approved for use – Kober 5BB, PP 101-14, Vierul-3. It was found that the rootstock genotype PP 101-14 stimulates early budding on the graft and callus formation during grafting stratification. The main death of vaccinations occurs 20-30 days. The absence of a common conducting system leads to the death of the grafted variety. It was found out that the varieties Fioletoviy Ranniy, Golubok are more compatible with the rootstock variety Vierul-3, the yield of grafted seedlings was 14.2 and 16.8%, respectively. To evaluate the compatibility of the components of the graft-rootstock combination, the only biometric indicators (growth length, leaf area and shoot diameter) are not enough. The rootstock variety affects phenotypic characteristics of grafted variety. The most objective assessment of compatibility can be obtained only after the end of vegetation after evaluating the quality of seedlings.
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