Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves

Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves

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The objective of this work was to select accessions resistant to early blight (Alternaria tomatophila) through cluster analysis of the disease progress curves in tomato (Solanum lycopersicum). One hundred and thirty‑four tomato accessions from the Banco de Germoplasma de Hortaliças of Universidade Federal de Viçosa (BGH‑UFV) were evaluated in a randomized complete block design, as well as the susceptible controls 'Débora' and 'Santa Clara'. The plants were inoculated with a mixture of spores from different Alternaria spp. isolates and evaluated regularly regarding disease severity every three days after inoculation, totalizing six evaluations. The logistic model was adjusted to data on early blight severity, and the estimates obtained for final disease incidence (B1) and rate of disease progression (B3) were subjected to multivariate analysis of variance (Manova). The means of these estimates, for each access, were subjected to cluster analysis. Twenty‑four distinct groups were formed based on disease‑progress curve clusters, which allowed the identification of the BGH‑2143, BGH‑2235, BGH‑2270, and BGH‑2118 accessions as potential sources of resistance to early blight.

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Main Authors: Laurindo, Bruno Soares, Laurindo, Renata Dias Freitas, Azevedo, Alcinei Mistico, Nick, Carlos, Silva, Derly José Henriques da, Mizubuti, Eduardo Seiti Gomide
Format: Digital revista
Language:por
Published: Pesquisa Agropecuaria Brasileira 2015
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/19855
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spelling rev-pab-br-article-198552015-02-27T12:14:49Z Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves Seleção de acessos de tomateiro resistentes à pinta‑preta pela análise de agrupamento das curvas de progresso da doença Laurindo, Bruno Soares Laurindo, Renata Dias Freitas Azevedo, Alcinei Mistico Nick, Carlos Silva, Derly José Henriques da Mizubuti, Eduardo Seiti Gomide Alternaria tomatophila; Solanum lycopersicum; germplasm bank; multivariate statistics; nonlinear models; genetic resources Alternaria tomatophila; Solanum lycopersicum; banco de germoplasma; estatística multivariada; modelos não lineares; recursos genéticos The objective of this work was to select accessions resistant to early blight (Alternaria tomatophila) through cluster analysis of the disease progress curves in tomato (Solanum lycopersicum). One hundred and thirty‑four tomato accessions from the Banco de Germoplasma de Hortaliças of Universidade Federal de Viçosa (BGH‑UFV) were evaluated in a randomized complete block design, as well as the susceptible controls 'Débora' and 'Santa Clara'. The plants were inoculated with a mixture of spores from different Alternaria spp. isolates and evaluated regularly regarding disease severity every three days after inoculation, totalizing six evaluations. The logistic model was adjusted to data on early blight severity, and the estimates obtained for final disease incidence (B1) and rate of disease progression (B3) were subjected to multivariate analysis of variance (Manova). The means of these estimates, for each access, were subjected to cluster analysis. Twenty‑four distinct groups were formed based on disease‑progress curve clusters, which allowed the identification of the BGH‑2143, BGH‑2235, BGH‑2270, and BGH‑2118 accessions as potential sources of resistance to early blight. O objetivo deste trabalho foi selecionar acessos resistentes à pinta‑preta (Alternaria tomatophila) por meio da análise de agrupamento das curvas de progresso da doença em tomateiro (Solanum lycopersicum). Foram avaliados 134 acessos de tomateiro do Banco de Germoplasma de Hortaliças da Universidade Federal de Viçosa (BGH‑UFV), no delineamento de blocos ao acaso, além das testemunhas suscetíveis 'Débora' e 'Santa Clara'. As plantas foram inoculadas com uma mistura de conídios de diferentes isolados de Alternaria spp. e avaliadas regularmente quanto à severidade da doença a cada três dias após a inoculação, no total de seis avaliações. Ajustou-se o modelo logístico aos dados de severidade da pinta‑preta, e as estimativas obtidas para a incidência final da doença (B1) e a taxa de progresso da doença (B3) foram submetidas à análise de variância multivariada (Manova). As médias dessas estimativas, para cada acesso, foram submetidas à análise de agrupamento. Foram formados 24 grupos distintos com base no agrupamento das curvas de progresso da doença, o que possibilitou identificar os acessos BGH‑2143, BGH‑2235, BGH‑2270 e BGH‑2118 de tomateiro como potenciais fontes de resistência à pinta‑preta. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira Fapemig CNPq Capes 2015-02-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/19855 Pesquisa Agropecuaria Brasileira; v.50, n.2, fev. 2015; 106-114 Pesquisa Agropecuária Brasileira; v.50, n.2, fev. 2015; 106-114 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/19855/12858 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/19855/12079
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language por
format Digital
author Laurindo, Bruno Soares
Laurindo, Renata Dias Freitas
Azevedo, Alcinei Mistico
Nick, Carlos
Silva, Derly José Henriques da
Mizubuti, Eduardo Seiti Gomide
spellingShingle Laurindo, Bruno Soares
Laurindo, Renata Dias Freitas
Azevedo, Alcinei Mistico
Nick, Carlos
Silva, Derly José Henriques da
Mizubuti, Eduardo Seiti Gomide
Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves
author_facet Laurindo, Bruno Soares
Laurindo, Renata Dias Freitas
Azevedo, Alcinei Mistico
Nick, Carlos
Silva, Derly José Henriques da
Mizubuti, Eduardo Seiti Gomide
author_sort Laurindo, Bruno Soares
title Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves
title_short Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves
title_full Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves
title_fullStr Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves
title_full_unstemmed Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves
title_sort selection of tomato accessions resistant to early blight by cluster analysis of disease progress curves
description The objective of this work was to select accessions resistant to early blight (Alternaria tomatophila) through cluster analysis of the disease progress curves in tomato (Solanum lycopersicum). One hundred and thirty‑four tomato accessions from the Banco de Germoplasma de Hortaliças of Universidade Federal de Viçosa (BGH‑UFV) were evaluated in a randomized complete block design, as well as the susceptible controls 'Débora' and 'Santa Clara'. The plants were inoculated with a mixture of spores from different Alternaria spp. isolates and evaluated regularly regarding disease severity every three days after inoculation, totalizing six evaluations. The logistic model was adjusted to data on early blight severity, and the estimates obtained for final disease incidence (B1) and rate of disease progression (B3) were subjected to multivariate analysis of variance (Manova). The means of these estimates, for each access, were subjected to cluster analysis. Twenty‑four distinct groups were formed based on disease‑progress curve clusters, which allowed the identification of the BGH‑2143, BGH‑2235, BGH‑2270, and BGH‑2118 accessions as potential sources of resistance to early blight.
publisher Pesquisa Agropecuaria Brasileira
publishDate 2015
url https://seer.sct.embrapa.br/index.php/pab/article/view/19855
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