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Previous issue date: 2016-09-29 / CAPES / ?BRS Vit?ria? is the first seedless grape cultivar launched by Embrapa Grape and Wine with tolerance to downy mildew (Plasmopora viticola), in addition to presenting high fertility of buds and a special flavor similar to raspberry but its clusters are compact, which requires the establishment of specific management techniques to reduce compactness. Two trials were conducted in the northwestern S?o Paulo state aiming to evaluate the agronomic performance of ?BRS Vit?ria? grapevine grafted onto different rootstocks, as well as the effect of shoots and/or clusters tipping together with the application of gibberellic acid (GA3) on production and characteristics of fruits. In the first experiment, the treatments were constituted by the combination of ?BRS Vitoria? grapevine grafted onto rootstocks ?Paulsen 1103?, ?Kober 5BB?, ?IAC 766? and ?IAC 572?, while in the second trial four tipping modalities (control or without tipping, shoots, clusters, shoots + clusters) were done in the end of flowering stage, associated or not with the GA3 application (0 and 30 mg L-1) when berries had 6-8 mm of diameter. It was verified that the period from beginning of ripening to harvest of clusters had greater influence in the production cycle (from pruning to harvest) of scion/rootstock combinations, presenting longer and shorter interval, respectively, when grafted onto ?IAC 766? and ?Paulsen 1103?. There was obtained higher production and vegetative vigor when grafted onto ?IAC 766? and ?IAC 572?, being that the ?IAC 766? provided the higher average of clusters weight and berries size. The rootstocks did not influence in total soluble solids (TSS) content and titratable acidity (TA) of the berries. In addition, there was no effect of the tipping treatments on production and characteristics of fruits, except for the TSS content, indicating that this technique may not be efficient to reduce clusters compactness of ?BRS Vitoria? grape or that it should not be performed during the flowering period. However, the clusters tipping in association with the use of GA3 allowed a higher average TSS content by reducing the difference between berries at the top and tip of cluster. One single application of GA3 at 30 mg L-1 when berries had 6-8 mm of diameter provided an increase in fruits weight and size but there was no significant effect (p> 0.05) on production and, although it has not caused a negative impact on quality of ?BRS Vitoria? grape, a decrease was observed in TSS content and TSS/TA ratio of the berries. / ?BRS Vit?ria? ? a primeira cultivar de uva sem sementes lan?ada pela Embrapa Uva e Vinho com toler?ncia ao m?ldio (Plasmopora viticola), al?m de apresentar alta fertilidade de gemas e um sabor especial semelhante ? framboesa, por?m seus cachos s?o compactos, o que exige o estabelecimento de t?cnicas espec?ficas de manejo para reduzir a compacidade. Foram conduzidos dois experimentos na regi?o noroeste do estado de S?o Paulo com o objetivo de avaliar o desempenho agron?mico da videira ?BRS Vit?ria? enxertada sobre diferentes porta-enxertos, bem como, o efeito do desponte de ramos e/ou de cachos em conjunto com a aplica??o do ?cido giber?lico (GA3) na produ??o e nas caracter?sticas dos frutos. No primeiro experimento, os tratamentos foram constitu?dos pela combina??o da videira ?BRS Vit?ria? enxertada sobre os porta-enxertos ?Paulsen 1103?, ?Kober 5BB?, ?IAC 766? e ?IAC 572?, enquanto no segundo experimento, foram realizadas quatro modalidades de desponte (testemunha ou sem desponte, ramos, cachos, ramos + cachos) no est?gio de fim do florescimento, associados ou n?o com a aplica??o de GA3 (0 e 30 mg L-1) quando as bagas apresentavam 6-8 mm de di?metro. Foi verificado que o per?odo do in?cio da matura??o ? colheita dos cachos teve maior influencia no ciclo de produ??o (da poda ? colheita) das combina??es copa/porta-enxerto, apresentando intervalo mais longo e mais curto, respectivamente, quando sobre ?IAC 766? e ?Paulsen 1103?. Obteve-se maior produ??o e vigor vegetativo sobre ?IAC 766? e ?IAC 572?, sendo que o ?IAC 766? proporcionou maiores m?dias de massa de cachos e tamanho de bagas. Os porta-enxertos n?o influenciaram no teor de s?lidos sol?veis totais (SST) e acidez titul?vel (AT) das bagas. Al?m disso, n?o houve efeito do desponte na produ??o e nas caracter?sticas dos frutos, exceto para o teor de SST, indicando que essa t?cnica pode n?o ser eficiente para reduzir a compacidade dos cachos de uva ?BRS Vit?ria? ou que n?o deve ser realizada durante o per?odo de florescimento. No entanto, o desponte de cachos associado com o uso do GA3 possibilitou um maior teor m?dio de SST ao reduzir a diferen?a existente entre bagas na parte superior e na ponta do cacho. Uma ?nica aplica??o de GA3 a 30 mg L-1 quando as bagas tinham 6-8 mm de di?metro proporcionou um aumento na massa e no tamanho dos frutos, por?m n?o houve efeito significativo (p >0.05) na produ??o e, embora n?o tenha causado um impacto negativo na qualidade da uva ?BRS Vit?ria?, observou-se uma redu??o no teor de SST e na rela??o SST/AT das bagas.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:jspui/2468 |
| Date | 29 September 2016 |
| Creators | PERMANHANI, Miqu?ias |
| Contributors | Vasconcellos, Marco Antonio da Silva, Souza, Reginaldo Teodoro de, Vasconcellos, Marco Antonio da Silva, Martelleto, Lu?s Aur?lio Peres, Coneglian, Regina Celi Cavestr?, Rosa, Raul Castro Carriello, Carvalho, Almy Junior Cordeiro de |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Programa de P?s-Gradua??o em Fitotecnia, UFRRJ, Brasil, Instituto de Agronomia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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