Affinity of Golubok vine variety with main rootstocks

The purpose of the study was to indicate the influence of rootstock grapevine varieties on regenerative activity and agrobiological parameters of Golubok variety (the yield of grafts after stratification, the survival rate of grafts in nursery) and the uvological properties of grapes (mass of a bunch, berry and comb; size of a berry; mass content of sugars and acids in a berry juice). The research was conducted by ARRIV&W – a branch of Federal State Budgetary Research Institution FRARC (Novocherkassk, Rostov Region). As a result of the studies, it was found out that the highest rates of scion affinity were obtained using the root-stock PP 101-14 – the yield of grafts after stratification was 91.0 %, the survival rate in the nursery was 54.4 %. On the rootstock Kober 5 BB, the yield was 85.3 %, Vierul-3 – 83.3 %, the number of surviving plants – 41.1 and 41.3 %, respectively. The influence of rootstock variety on longevity of vineyards was established. The lowest loss of 15-year-old bushes was observed on the Vierul-3 rootstock, the safety of bushes was 89.2 %, PP 101-14 – 84.8 %, Kober 5 BB – 73.8 %. The influence of rootstock on vegetative parameters was established. Bushes grafted on the rootstock Kober 5 BB had the largest leaf surface area and the area of a one leaf, on the rootstock PP 101-14 bushes were characterized by a weaker vigor, a large number of leaves and a smaller leaf surface area. The influence of a rootstock on reproductive properties of the grafted variety was established. Grafting on the rootstock Vierul-3 allowed increasing the yield. The uvological indicators indicate a significant positive effect of the Vierul-3 rootstock on the average mass of a bunch and berry, on bunch and berry size, on structure and shape of a bunch, and on the mass concentration of sugars. Thus, in the conditions of the studied agrocenosis, it is advisable to use the root-stock variety Vierul-3 for grafting the Golubok variety.