Rootstock on production and quality of ‘Niagara Rosada’ grapevine

Abstract

Abtract In Brazil, the producers have changed used rootstocks to get more vigor to scion. Rootstocks change the distribution of bud fruitfulness over grapevine shoots and the expression of the bud fruitfulness into fruit yield. Hence, these modification could alter ideal pruning length. In this way, it was evaluated bud fruitfulness, fruit yield and quality of ‘Niagara Rosada’ grapevine grafted onto rootstocks: ‘IAC 766’, ‘IAC 572’, ‘IAC 313’, ‘IAC 571-6’, and ‘Riparia do Traviu’, which ‘IAC 766’ is the most used rootstock in São Paulo State, nowadays. The evaluations were performed over three crop seasons, in a vineyard located in Louveira, SP. Two evaluations were performed in Brazilian traditional season, and one crop pruning was performed in Brazilian summer, called “off-season”. In traditional seasons, the bud fruitfulness was evaluated from the first to fourth bud in 2014 and to the fifth in 2015. In the off-season, bud fruitfulness was evaluated from the fifth to eighth bud. Fruit yield and quality were also evaluated over the three production cycles. Bud fruitfulness of ‘Niagara Rosada’ grafted onto the evaluated rootstocks showed that this characteristic was more affected by the environmental conditions, confirmed due to alteration of bud fruitfulness through production cycles. Additionally, no effect of rootstock was observed on fruit yield, and quality of ‘Niagara Rosada’. Only isolated variations were detected, and these are not enough to confirm the influence of rootstocks on scion of ‘Niagara Rosada’. Although no effect of rootstocks on bud fruitfulness, fruit yield and quality has been observed in the evaluated conditions, all rootstocks are recommended to be used in combination with ‘Niagara Rosada’.

Agronomic performance of ‘BRS Melodia’ seedless table grape grafted onto different rootstocks

“…The rootstock IAC 572 had the largest mean stem diameter (35.01 mm), larger than that of Paulsen 1103, SO4, and 101-14 MgT. IAC 572 is characterized by high vigor, which induces the scion cultivars grafted onto it (Angelotti-Mendonça et al 2018, Embrapa 2023a, Pimentel Junior et al 2018, though this may be a characteristic restrictive to its use, since plants with very high vigor tend to decrease bud fertility and, consequently, fructification potential (Leão and Rodrigues 2015). However, under the conditions of this study, this trend was not observed, since the rootstock IAC 572 and IAC 766 led to an increase in the bud fertility index of 'BRS Melodia' grapevines in relation to Ramsey, and neither one differed from the other rootstocks studied.…”

The influence of rootstock on vigor and bud fertility of ‘BRS Tainá’ grape in the São Francisco Valley

“…Although the stem is also an energy reserve organ for the plant, the reduction of the growth rate observed between the last two evaluated cycles can be considered normal, because with the age advancement and the consec-utive production cycles, the plants in general try to restore their reserves preferably in the roots. Most of the authors consider the vine vigor as being only the vegetative biomass removed during the pruning, not measuring other important characteristics such as the stems and branches secondary growth (ANGELOTTI-MENDONÇA et al, 2018;LEÃO et al, 2020b). It is important to highlight that the fresh mass obtained during the production pruning should not be the only measure to estimate the vine vigor, since the amount of material produced depends on other factors, such as the branch diameter, number of buds, energy reserves left after the previous productive cycle, rest period among crops and edaphoclimatic conditions (KELLER, 2015b).…”

Meiotic behavior of two grapevine somatic mutants with ornamental potential

“…The immature berries bear white and green stripes running along the length of the fruit. Considering these extremely different traits, the mutant shoots were propagated by hardwood cuttings and have been kept in the grape collection as new varieties and have ever since been studied with different approaches (Sousa, 1959;Sousa, 1996;Tofanelli et al, 2011;Angelotti-Mendonça et al, 2018).…”