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

Abstract ‘BRS Tainá’ is a new seedless table grape cultivar developed and recommended for the Submedium of São Francisco Valley, the main producing and exporting region of table grapes in Brazil. The objective of this study was to evaluate the influence of rootstock on vigor, bud fertility, sucrose and total soluble carbohydrates content in leaves of ‘BRS Tainá’ vine cultivated in semi-arid environmental conditions in the Brazilian Northeast. The treatments were represented by eight rootstocks: ‘101-14 MgT’, ‘IAC 313’, ‘IAC 572’, ‘IAC 766’, ‘Paulsen 1103’, ‘Ramsey’, ‘SO4’ and ‘Teleki 5C’. The experimental design was in randomized blocks with four replications, in split plots, the production cycles were considered as plots, and eight rootstocks as subplots. The following variables were evaluated: pruning weight, stem diameter, number of lateral bunches, bud fertility, sucrose and total soluble carbohydrates content in leaves. The ‘BRS Tainá’ vine had moderate canopy vigor and 54% of bud fertility. The carbohydrate content and sucrose in the leaves did not differ among treatments during pruning. Therefore, it is possible that there is no effect of the rootstock on the initial vegetative growth of ‘BRS Tainá’ vines, which vigor and bud fertility remained stable in the initial production cycles.

摘要：‘BRS Tainá’是一款全新选育的无核鲜食葡萄品种，专为巴西鲜食葡萄主产及出口核心产区——圣弗朗西斯科河谷中海拔种植区选育并推广。本研究旨在评估巴西东北部半干旱环境下，砧木对‘BRS Tainá’葡萄的树势、萌芽率以及叶片蔗糖与总可溶性碳水化合物含量的影响。试验共设置8个砧木处理，分别为‘101-14 MgT’、‘IAC 313’、‘IAC 572’、‘IAC 766’、‘Paulsen 1103’、‘Ramsey’、‘SO4’及‘Teleki 5C’。试验采用裂区随机区组设计，设置4次重复，以生产周期为主区，8个砧木为副区。本试验测定的指标包括：修剪重量、茎粗、副穗数、萌芽率以及叶片蔗糖与总可溶性碳水化合物含量。结果显示，‘BRS Tainá’葡萄树势中等，萌芽率达54%。修剪期各处理间的叶片碳水化合物与蔗糖含量无显著差异。由此可见，砧木对‘BRS Tainá’葡萄的初始营养生长无显著影响，其树势与萌芽率在初始生产周期内保持稳定。