Desempenho agronômico e qualidade de uvas ‘BRS ISIS’ e ‘BRS VITÓRIA’ no submédio do Vale do São Francisco sob diferentes porta-enxertos

Abstract

The Northeast region of Brazil is characterized by the production of fine table grapes in semi-arid tropical conditions, standing out as the second largest region producing grapes in the country. The use of rootstocks has been a common practice in viticulture, contributing to the success of production. The objective of this work was to evaluate the agronomic performance and quality of the grapes BRS Ísis and BRS Vitória, in irrigated cultivation in the São Francisco Valley, on the rootstocks 'IAC 313', 'IAC 572', 'IAC 766', 'SO4' and 'Paulsen 1103' 'Harmony' and 'Freedom', the experimental design was a randomized block design with four replications, two useful plants per plot with 3m x 2m spacing, using horizontal trellis conduction system, and irrigation located by drip. The following variables were evaluated: sprout percentage and shoot fertility index, yield, number of bunches, firmness, peel color (L, a * b *), soluble solids content, total soluble sugars, titratable acidity (TA), total anthocyanin content, yellow flavonoid content of the shell and total extractable polyphenols content. The rootstock and production cycle did not influence the production components of the BRS Isis cultivars, but in the cultivar BRS Vitoria there was a reduction in the agronomic performance of the vines in the cycle of the first half of 2018. In general, it was possible to observe that the rootstock IAC 572 presented more divergent values in relation to the other evaluated treatments. In this way it can be considered as an alternative to be used by producers in commercial areas in the region of the Valley of the San Francisco.