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Com a finalidade de gerar plântulas para o melhoramento genético, investigou-se a germinação de sementes de uva estudando-se a estratificação a frio, a aplicação de giberelina e a interação desses fatores. A conjugação de períodos de estratificação maiores que 13 dias com doses de giberelina (GA3) mostrou-se útil na quebra da dormência e na redução do seu tempo. A dose ideal de GA3 foi encontrada ao redor de 2.000 ppm e o menor período de estratificação, de cerca de 32 dias. Sementes de 61 progenitores potenciais foram germinadas em vasos com terra, mostrando-se a maior parte deles apta a ser usada em programas de melhoramento, com germinação superior a 45%, após os tratamentos indicados. 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

Capacidade de germinação e quebra de dormência em sementes de cultivares de videira