Rootstocks induce shifts in tree vigor, yield and berry quality of 'summer black' grapevines

Abstract

The agronomic performances of grape (Vitis vinifera L.) cv. 'Summer Black' vines on different resistant rootstocks including '101-14M', '110R', '188-08', '5BB', '5C', 'Beta' and 'SO4' (with non-grafted vines as control) were evaluated to make dependable selections of rootstocks for cultivation. Tree vigor, fruit yield and berry quality related traits of eight combinations were assessed over three consecutive years. Scion vigor was improved by 'Beta' which greatly increased mature shoot length (MSL), and by 'SO4' which distinctly enlarged scion trunk cross sectional diameter (TCD). Vines were remarkably productive on ‘S04’ while yield was restrained on '101-14M'. Cluster mass (CM) was maximal on '188-08', minimal on '5C', and berry mass (BM) was maintained by '188-08', '5BB' and 'SO4'. Grape berries on '101-04M' obtained total soluble solids (TSS) highly close to that of non-grafted vines. Overall, trees on '5BB' and '5C' acquired similar berry qualities (size, chemical traits and texture), yields and growth vigor to the control vines, and they were preferentially recommended for grafting cultivation of 'Summer Black' grapevines.