Effect of rootstocks on yield and wine quality of Sauvignon Blanc variety

Abstract

The influence of rootstocks on yield, grape composition, wine quality and sensory evaluation of Sauvignon Blanc was examined during 2022-23 at ICAR-National Research Centre for Grapes, Pune, India. Seven rootstocks (Dogridge, Salt Creek, Fercal, 110R, 140Ru, SO4 and 1103P) were used for study. Among the rootstocks, yield/vine (7.70 kg), average bunch weight (205.33g), no. of berries/bunch (130.00), 100-berry weight (130.67 g) was significantly higher in Dogridge grafted vine. TSS (24.93 oBrix) was higher in berries of Dogridge grafted vines; acidity (0.99%), phenol (0.740 mg/g) and tannins (0.467 mg/g) was higher in 140 Ru rootstock; carbohydrates (35.41 mg/g) in Fercal rootstock; reducing sugars was higher in 110R rootstock (23.45 mg/g). While, higher juice recovery was recorded in 1103P rootstock (63.59%). Wine composition like glucose (2.69 g/l), mallic acid (3.2 g/l), total acids (7.3 g/l) was higher in 110R rootstock; volatile acids (0.52 g/l) in 1103P rootstock and phenol content in Salt Creek rootstock (0.79 mg/g). While, colour intensity (0.034) and proline content (11.871 u.mole/g) found higher with SO4 rootstock. The overall acceptability of wine found better for Sauvignon Blanc vines grafted on 110R rootstock.