The objective of this work was to study the influence of the '1103 Paulsen' and 'IAC-572 Jales' rootstocks vigor in the agronomic performance of the cultivars 'Crimson Seedless' and 'Superior Seedless'. The experiment was carried in the Epamig Experimental Farm located in Mocambinho, Jaíba, MG, Brazil, in completely randomized experimental design with seven replications in factorial 2x2. The following variables were studied: bud fertility, number and weight of clusters and cane weight. The '1103 Paulsen' rootstock showed better results for cultivars 'Crimson Seedless' and 'Superior Seedless' regarding the number of clusters and their weight by plant and bud fertility, with average productivity of 31.9 and 22.4 t ha-1 year-1 , respectively. The 'IAC-572 Jales' rootstock provided higher vigor, comprising greater weight of canes per plant in both cultivars. The '1103 Paulsen' rootstock induced higher bud fertility and productivity for 'Crimson Seedless' and 'Superior Seedless' grapes and can be indicated for cultivation in the Jaíba region.
Vitis vinifera; rootstock; seedless grapes; vigor
