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METHODS FOR INOCULATION WITH Fusarium guttiforme AND GENETIC RESISTANCE OF PINEAPPLE (Ananas comosus var. comosus) Translated title: MÉTODOS DE INOCULAÇÃO DE Fusarium guttiforme E RESISTÊNCIA GENÉTICA EM ABACAXIZEIROS (Ananas comosus var. comosus)

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      Abstract

      ABSTRACT The objective of this work was to evaluate Fusarium guttiforme inoculation methods and genetic resistance of pineapple accessions. Thus, three experiments were conducted: pathogen inoculation of different leaf types (B, D and F) of pineapple (1), pathogen inoculation of pineapple cuttings and detached D leaves (2), and identification of resistance to fusariosis in 19 pineapple accessions (3) sampled in the State of Mato Grosso, Brazil. The cultivars Pérola (susceptible to fusariosis) and BRS-Vitória (resistant to fusariosis) were used as controls. The fusariosis severity was evaluated at 10, 15, 20, 25 and 30 days after inoculation with F. guttiforme. The lesion diameters (severity level) were used in order to calculate the area under the disease progress curve (AUDPC). The inoculation of detached D leaves was the most efficient, fast and inexpensive method, and the one that most satisfactorily reproduced the disease symptoms. The period of 10 to 20 days after inoculation of the D detached leaves with the pathogen is the most suitable to evaluate the resistance of pineapple accessions to fusariosis. The lowest lesion area and AUDPC was found in the accession 1, in all evaluations. Thus, the accession 1 can be used in pineapple breeding programs for resistance to fusariosis.

      Translated abstract

      RESUMO Objetivou-se avaliar métodos de inoculação de Fusarium guttiforme e a resistência genética em acessos de abacaxizeiro. Para isso, foram realizados três experimentos, a saber: 1- inoculações em folhas de abacaxizeiro dos tipos B, D e F; 2- inoculações em folhas “D” destacadas e em mudas de abacaxizeiro e 3- identificação de resistência à fusariose em 19 acessos de abacaxizeiros coletados no estado de Mato Grosso. As cultivares Pérola (suscetível à fusariose) e BRS-Vitória (resistente à fusariose) foram utilizadas como testemunhas. As avaliações de severidade da fusariose foram conduzidas aos 10, 15, 20, 25 e 30 dias, após inoculação de F. guttiforme. Foram utilizados os diâmetros das lesões (quantificação da severidade), para o cálculo da área abaixo da curva de progresso da doença (AACPD). Dentre os métodos avaliados, observou -se que o método de inoculação em folhas D destacadas foi o mais eficiente, rápido e de baixo custo, além de reproduzir satisfatoriamente os sintomas da doença. O período indicado para avaliar acessos resistentes a fusariose é entre 10 e 20 dias após inoculação do patógeno, em folhas D destacadas. No acesso 1 foi observada menor área de lesão e AACPD, em todas as avaliações realizadas. Este acesso pode ser recomendado para compor programas de melhoramento do abacaxizeiro visando resistência à fusariose.

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      Sisvar: a computer statistical analysis system

      Sisvar is a statistical analysis system, first released in 1996 although its development began in 1994. The first version was done in the programming language Pascal and compiled with Borland Turbo Pascal 3. Sisvar was developed to achieve some specific goals. The first objective was to obtain software that could be used directly on the statistical experimental course of the Department of Exact Science at the Federal University of Lavras. The second objective was to initiate the development of a genuinely Brazilian free software program that met the demands and peculiarities of research conducted in the country. The third goal was to present statistical analysis software for the Brazilian scientific community that would allow research results to be analyzed efficiently and reliably. All of the initial goals were achieved. Sisvar gained acceptance by the scientific community because it provides reliable, accurate, precise, simple and robust results, and allows users a greater degree of interactivity.
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        Produção Agrícola

        (2019)
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          Efeitos de substratos e recipientes na aclimatação de plântulas de abacaxizeiro [Ananas comosus (L.) Merril] cv. Pérola

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            Author and article information

            Affiliations
            Tangará da Serra Mato Grosso orgnameUniversidade do Estado de Mato Grosso orgdiv1Department of Agronomy Brazil wan_moreirahotmail.com,, krauseunemat.br,, dejaniaunemat.br,, isane9yahoo.com.br,, rivanildo@ 123456unemat.br.
            Contributors
            Role: ND
            Role: ND
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            Journal
            rcaat
            Revista Caatinga
            Rev. Caatinga
            Universidade Federal Rural do Semi-Árido (Mossoró, RN, Brazil )
            0100-316X
            1983-2125
            June 2017
            : 30
            : 2
            : 353-360
            S1983-21252017000200353
            10.1590/1983-21252017v30n210rc

            This work is licensed under a Creative Commons Attribution 4.0 International License.

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            Figures: 0, Tables: 0, Equations: 0, References: 23, Pages: 8
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            Product Information: SciELO Brazil

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