GOLIA - GRAPEVINE VARIETY WITH INCREASED FROST RESISTANCE

Abstract

Obtaining new valuable grapevine varieties, with superior grape yield and quality, possessing an increased genetic resistance to diseases and frost, is the result of breeding research programs. In this context, at the Research - Development Station for Viticulture and Oenology Iaşi, as a result of the sexual hybridization between the Sauvignon × Şarba varieties, was homologated in 1999 the new variety Golia, intended for quality white wines. The Golia variety was studied in the period 2015 - 2022, compared to Fetească albă, one of the most renowned varieties of the Iași vineyard assortment. The results obtained regarding the vulnerability of the varieties to low temperatures, assessed by the percentage of viable buds, attest that Golia variety has an increased genetic resistance to frost. Also, compared to the homologation data, was noted a production potential close to the normal biological yield of the variety and a tendency to increase the accumulation of sugars in the must, under the influence of the climate changes in recent years. Thus, in the study period, the average yield was 3.57 kg/stock for the Golia variety, very close to the control variety Fetească albă (3.88 kg/stock). At full maturity, grapes accumulated an average sugar amount of 217 g/L and a total acidity of 5.65 g/L (as tartaric acid). The obtained wine stands out for its alcoholic strength (13.10% vol.), superior to the Fetească albă variety (11.57 % vol.), a higher non-reducing dry extract (19.0 g/L) and polyphenolic content (0.47 g/L).