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Jundiaí, Brazil

Da Silva M.J.R.,Sao Paulo State University | Tecchio M.A.,Sao Paulo State University | Moura M.F.,Centro Apta Of Frutas | Brunelli L.T.,Sao Paulo State University | And 2 more authors.
Pesquisa Agropecuaria Brasileira | Year: 2015

Resumo-O objetivo deste trabalho foi avaliar a influência dos porta-enxertos 'IAC 766 Campinas' e '106-8 Mgt Ripária do Traviú' sobre as características físico-químicas do mosto e do vinho das uvas 'IAC 116-31 Rainha', 'IAC 21-14 Madalena' e 'BRS Lorena'. O mosto das uvas foi avaliado quanto ao pH, sólidos solúveis (SS), acidez total (AT) e relação SS/AT. No vinho, realizaram-se as seguintes análises físico-químicas: densidade, teor alcoólico; acidez total, volátil e fixa; pH; extrato seco; açúcares redutores; extrato seco reduzido; álcool em peso/extrato seco reduzido; dióxido de enxofre livre e total; índice de polifenóis totais (I 280), polifenóis totais, flavonoides; e atividade antioxidante. As características do mosto da 'IAC 21-14 Madalena' não foram influenciadas pelos porta-enxertos, no entanto, o porta-enxerto 'IAC 766 Campinas' promoveu maior SS/AT no mosto da 'IAC 116-31 Rainha' e menor SS/AT no da 'BRS Lorena. Os porta-enxertos 'IAC 766 Campinas' e '106-8 Mgt Ripária do Traviú' influenciaram o pH e o teor alcoólico do vinho da 'IAC 116-31 Rainha', o extrato seco do vinho da 'IAC 21-14 Madalena' e a acidez fixa do vinho da 'BRS Lorena'. Não houve influência dos porta-enxertos sobre os compostos fenólicos e a atividade antioxidante dos vinhos.

Moura M.F.,Centro Apta Of Frutas | Tecchio M.A.,Centro Apta Of Frutas | Dias-Arieira C.R.,State University of Maringa | Puerari H.H.,State University of Maringa | And 2 more authors.
Acta Horticulturae | Year: 2014

This study evaluated, under controlled conditions, the reaction of ten grape rootstocks from a germplasm collection at the Programa de Melhoramento Genético de Videira, Centro APTA de Frutas do Instituto Agronômico de Campinas, Brazil, against Meloidogyne incognita and M. javanica nematodes. Seedlings were inoculated with 4,000 eggs and juveniles. After 60 days, root systems were evaluated with respect to the amount of galls in order to determine, by calculating reproduction rates, immunity, resistance and susceptibility. Rootstocks 101-14, Teleki-5C, IAC 313, IAC 766, Kober 5BB and Ripária do Traviú behaved as immune to both species of nematodes - R99 was resistant. IAC 571-6 and IAC 572 behaved as resistant to M. incognita and immune to M. javanica; 420-A was immune to M. incognita and resistant to M. javanica.

Moura M.F.,Centro Apta Of Frutas | Tecchio M.A.,Centro Apta Of Frutas | Chiorato A.F.,Centro Apta Of Frutas | Terra M.M.,Centro Apta Of Frutas | And 4 more authors.
Acta Horticulturae | Year: 2014

Germplasm bank characterization as well as adequate statistical methods allows the identification of divergent parents. Therefore, this study aimed to evaluate the genetic divergence among 56 accessions of grapevine of the Germplasm Collection at Instituto Agronômico - IAC, characterized by eight quantitative traits. Multivariate analyses were used to quantify the divergence among the accessions. Euclidian distance, principal components and Tocher's clustering method were applied. The Tocher's method applied to the matrix of Euclidian distance with scores of principal components discriminated seven groups, with the first two comprised 69.64% and 17.86% respectively of total access. About 77,27% of the total variation was explained by the first two main components and 86,94% was explained by the three first main components obtained with eight components analysis. Thus, the multivariate analysis to study genetic diversity applied to the quantitative characters (Tocher's clustering method and principal components) agreed among themselves, being efficient for analysis of the genetic diversity of germplasm of grapevine at IAC, which can be used for guidance in future crosses for breeding of this species. However, additional characteristics related to productivity, cycle and quality of most will be realized and added to these works of diversity.

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