Germination of grape seeds was studied in order to evaluate their potential in producing seedlings for breeding programs. Chilling at 5°C, gibberelin application and the interaction between these agents were investigated. The conjugation of chilling periods larger than 13 days with gibberelin dosis broke dormancy and reduced the time required for it. The ideal dose of GA3 was found to be around 2,000 ppm and the shortest chilling period around 32 days. A deleterious effect was verified when seeds were stored in room conditions, without temperature or humidity control. The percentage of dead seeds was increased. Seeds from 61 potential parents were germinated in pots filled with soil, and most of them were able to be used in breeding programs, with a germination superior to 45%, after treated as indicated.
Vitis sp.; seeds; seedlings; growth regulators; grape breeding