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      Variability in leaf rust susceptibility among peach cultivars Translated title: Variabilidade entre cultivares de pessegueiro quanto a suscetibilidade à ferrugem da folha (Tranzschelia discolor f. sp. persica)

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          Abstract

          The aim of this work was to estimate the susceptibility of thirty-six peach cultivars to leaf rust caused by Tranzschelia discolor f. sp. persica. The incidence and severity of the disease as well as defoliation in peach trees of an experimental orchard of Parana Federal University of Technology, Campus Dois Vizinhos were evaluated on the growing seasons 2004/2005 and 2005/2006. Immunity to this disease was not observed in the studied cultivars. There was difference in leaf rust intensity depending on the growing season conditions. Cultivars 'Pilcha', 'Sinuelo', 'Chirua', 'Sulina', 'Eldorado' and 'Pampeano' showed tolerance to leaf rust, whereas cultivars 'Vila Nova', 'Fla 1372', 'Coral 2', 'Chimarrita', 'Della Nona', 'BR-1 ' and 'Guaiaca' showed high susceptibility.

          Translated abstract

          Este trabalho objetivou avaliar a suscetibilidade de trinta e seis cultivares de pessegueiro à ferrugem da folha. Foram realizadas avaliações de percentual de incidência e severidade da doença nas folhas e percentual de desfolha, durante os ciclos de 2004/2005, e 2005/2006, em uma coleção da Universidade Tecnológica Federal do Paraná, Campus Dois Vizinhos. Não foi observada imunidade à ferrugem da folha nos cultivares avaliados. Houve diferença na intensidade da doença em função das condições climáticas de cada ciclo. Os cultivares 'Pilcha', 'Sinuelo', 'Chirua', 'Sulina', 'Eldorado' e 'Pampeano' se mostraram tolerantes à ferrugem, enquanto que 'Vila Nova', 'Fla 1372' (Maravilha), 'Coral 2', 'Chimarrita', 'Della Nona', 'BR-1' e 'Guaiaca' foram classificadas como altamente suscetíveis.

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          Applied multivariate statistical analysis

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            Programa Genes: versão Windows: aplicativo computacional em genética e estatística

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rceres
                Revista Ceres
                Rev. Ceres
                Universidade Federal de Viçosa (Viçosa )
                2177-3491
                April 2010
                : 57
                : 2
                : 185-193
                Affiliations
                [1 ] Universidade Tecnológica Federal do Paraná Brazil
                [2 ] Universidade Tecnológica Federal do Paraná Brazil
                [3 ] Universidade Tecnológica Federal do Paraná Brazil
                [4 ] Embrapa Clima Temperado Brazil
                Article
                S0034-737X2010000200008
                10.1590/S0034-737X2010000200008
                0c83a14a-c7fd-4822-a23f-57d37f7823ae

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0034-737X&lng=en
                Categories
                AGRICULTURE, MULTIDISCIPLINARY

                General agriculture
                Prunus persica L. Batsch,disease resistance,dissimilarity measures,Prunus persica (L.) Batsch,resistência a doenças,medidas de dissimilaridade

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