Rootstocks for table grape 'BRS Maria Bonita' in the São Francisco Valley, northeast Brazil
BRS Maria Bonita is a red seedless table-grape cultivar developed by Embrapas grape breeding program. This work aimed to study the influence of rootstock on production components and physico-chemical characteristics of BRS Maria Bonita grapes in the tropical conditions of the São Francisco Valley. The experiment was carried out in the experimental field of Embrapa Semiarido in Petrolina, PE, Brazil, during five production cycles, using six rootstocks: Harmony, SO4, Paulsen 1103, IAC 572, IAC 313 and IAC 766. The experimental design was random blocks with three replicates. The averages of five production cycles presented statistically significant differences for most variables. Rootstock IAC 766 increased yield and number of bunches compared with Harmony and SO4. An average of 14.8 t ha‑1 per cycle and 35 bunches per plant was obtained on IAC 766. The sizes of the bunch and berry were lower with rootstock SO4, but did not differ with the other rootstocks. Soluble solids content (SSC) was not influenced by rootstock, reaching mean values of 16.24 °Brix, while the titratable acidity (TA) was higher when the grapes were grafted on SO4 (0.56 g tartaric acid 100 mL‑1) in comparison with Harmony (0.45 g tartaric acid 100 mL‑1) and IAC 313 (0.47 g tartaric acid 100 mL‑1). The SSC/TA ratio also did not show differences between rootstocks, ranging from 32.4 (SO4) to 41.8 (Harmony). Rootstock IAC 766 should be used to increase yield and number of bunches of BRS Maria Bonita grown in the São Francisco Valley, northeast Brazil.
Leão, P.C.S., de Lira, M.M.C., de Moraes, D.S. and da Silva, E.R. (2019). Rootstocks for table grape 'BRS Maria Bonita' in the São Francisco Valley, northeast Brazil. Acta Hortic. 1248, 375-380
seedless table grape, grafting, grapevine, rootstock