Characterization of tomato accessions for resistance to early blight

Grigolli, J. F. J.; Kubota, Mirian Maristela; Alves, Daniel Pedrosa; Rodrigues, Gabriel Belfort; Cardoso, Carine Rezende; Silva, Derly José Henriques da; Mizubuti, Eduardo S. G.

doi:10.1590/s1984-70332011000200010

Cited by 30 publications

(20 citation statements)

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“…The development of an effective improvement programme depends upon the existence of genetic variability (Meena and Bahadur, 2013) and knowledge of genotypic and phenotypic correlation of yield components. High genetic variability will increase the chances of establishing superior accessions/genotypes successfully in subsequent generations of selection (Hallauer and Miranda Filho, 1988;Grigolli et al, 2011). Correlation study measures the natural relationship between various traits and helps in determining the component traits on which selection can be based for yield improvement (Cruz and Regazzi, 2006;Grigolli et al, 2011;Izge et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Genetic analysis of agronomic and biochemical variables among different tomato (Solanum lycopersicum L.) accessions

Meena

Bahadur

Jagtap

et al. 2015

JANS

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Abstract:In the present study, thirty accessions of tomato were evaluated for estimation of correlation and path analysis among various quantitative and qualitative characters related to fruit yield. There were highly significant differences among the accessions for all the characters studied as per the analysis of variance. Genotypic correlation coefficients were generally similar in nature and higher in magnitude than the corresponding phenotypic correlation coefficients. The results revealed that the fruit yield plant -1 was significantly and positively correlated with number of fruits plant -1 (0.3119 and 0.3184) followed by fruit set percentage (0.2434 and 0.2499), fruit weight (0.6766 and 0.6731), polar diameter of fruit (0.4687 and 0.4635) at genotypic and phenotypic level, respectively, indicating that effective improvement in fruit yield plant -1 through these characters could be achieved. Fruit weight showed positive and significant genotypic and phenotypic correlation with fruit yield plant -1 by having greatest positive direct effect (1.1298 and 1.1116) on fruit yield plant -1 at both levels, indicating the true relationship between them and the feasibility to exploit the potentiality of this trait for effective direct selection to improve fruit yield plant -1 .

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Section: Introductionmentioning

confidence: 99%

Genetic analysis of agronomic and biochemical variables among different tomato (Solanum lycopersicum L.) accessions

Meena

Bahadur

Jagtap

et al. 2015

JANS

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“…Grigolli et al (2011), ao avaliar a resistência à pinta-preta, também encontraram acessos mais susceptíveis que as cultivares Débora e Santa Clara.…”

Section: Modelounclassified

“…Como não há cultivares de tomateiro resistentes à doença (Grigolli et al, 2011), a medida mais utilizada para o controle da pinta-preta é a aplicação de fungicidas, o que acarreta o aumento do custo de Pesq. agropec.…”

Section: Introductionunclassified

“…Para isso, é necessário identificar fontes de resistência em acessos de tomateiro armazenados em bancos de germoplasma. Geralmente, a seleção de genótipos resistentes é feita com base somente na área abaixo da curva de progresso da doença (Grigolli et al, 2011;Kumar & Srivastava, 2013), de acordo com a metodologia algébrica proposta por Campbell & Maden (1990). No entanto, o formato da curva de progresso da doença também apresenta informações importantes sobre a dinâmica da doença (Azevedo et al, 2012).…”

Section: Introductionunclassified

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Seleção de acessos de tomateiro resistentes à pinta-preta pela análise de agrupamento das curvas de progresso da doença

Laurindo

Azevedo

et al. 2015

Pesq. agropec. bras.

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Resumo -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 (B 1 ) e a taxa de progresso da doença (B 3 ) 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.Termos para indexação: Alternaria tomatophila, Solanum lycopersicum, banco de germoplasma, estatística multivariada, modelos não lineares, recursos genéticos. Selection of tomato accessions resistant to early blight by cluster analysis of disease progress curvesAbstract -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 (B 1 ) and rate of disease progression (B 3 ) 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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“…Given this perspective, materials were selected that have resistance to certain diseases, such as black spot, so as to increase productivity (PAULA; OLIVEIRA, 2003;GRIGOLLI et al, 2011). Laurindo et al (2015) reported that BGH-2143 access, BGH-2235, BGH-2270, BGH-2118, belonging to S. lycopersicum species are potential sources of resistance to early blight.…”

Section: Introductionmentioning

confidence: 99%

PRODUCTIVE POTENTIAL OF THE CHERRY TOMATO GENOTYPE GROUP BEFORE INFECTION BY Alternaria tomatophila

et al. 2017

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-Early blight (caused by Alternaria tomatophila) is a major disease of tomato with no resistant cultivars. Thus, it is necessary to identify sources of resistance and productive genotypes for the development of new cultivars. Therefore, this study aimed to evaluate the productive potential of cherry tomato genotypes grown in the summer / fall, the severity of early blight on leaves and the incidence of disease in fruits. The treatments consisted of Carolina tomato genotypes, Cereja Vermelho, CH 152 and CLN1561A. The experimental design consisted of randomized blocks with six replications, and the experimental plot had 16 plants. The following characteristics were evaluated: area under the disease progress curve (AUDPC), average number of microinjuries on the fruits (MF), average number of fruits per bunch (NFC), average number of bunches per plant (NCP), average number of fruits per plant (NFP), average yield, number of fruits with incidence of early blight per plant (NFI) and the severity of early blight in leaves (%). The cherry tomato genotype CH152 showed tolerance to early blight with a smaller area under the disease progress curve, lower severity and fruits with incidence of A. tomatophila were not observed in this genotype. The CH152 had the highest number of fruits per bunch, greater number of bunches per plant, higher number of fruits per plant and higher productivity. This line has great potential of being integrated into breeding programs.Keywords: Solanum lycopersicum var. cerasiforme. Early blight. Climate conditions. Severity. POTENCIAL PRODUTIVO DE GENÓTIPOS DE TOMATEIRO DO GRUPO CEREJA DIANTE À INFECÇÃO POR Alternaria tomatophilaRESUMO -A pinta preta (Alternaria tomatophila) é uma das principais doenças do tomateiro não havendo cultivares resistentes à doença. Com isso, é necessário identificar fontes de resistência e genótipos produtivos na perspectiva de desenvolvimento de novas cultivares. Logo, objetivou com esse estudo avaliar o potencial produtivo de genótipos de tomateiro cereja cultivados no verão/outono, a severidade da pinta preta nas folhas e a incidência da doença nos frutos. Os tratamentos consistiram dos genótipos de tomateiro Carolina, Cereja Vermelho, CH 152 e CLN1561A. O delineamento experimental foi de blocos ao acaso com seis repetições, sendo a parcela experimental constituída por 16 plantas. Foram avaliadas as seguintes características: área abaixo da curva de progresso da doença (AACPD), número médio de microferimentos nos frutos (MF), número médio de frutos por cacho (NFC), número médio de cachos por planta (NCP), número médio de frutos por planta (NFP), produtividade média, número de frutos com incidência de pinta preta por planta (NFI) e a severidade da pinta preta nas folhas (%). O genótipo de tomateiro cereja CH152 apresentou tolerância à pinta preta com menor área abaixo da curva de progresso da doença, menor severidade e também não foram observados frutos com incidência de A. tomatophila nesse genótipo. O CH152 apresentou o maior número de frutos por cacho, m...

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Characterization of tomato accessions for resistance to early blight

Abstract: - BGH-2081, BGH-2034, BGH-700, BGH-2057, BGH-2035, BGH-2054, BGH-2018, BGH-2065, BGH-2008, and BGH-2032 had a lower mean AUDPC than the controls and are therefore indicated for future breeding programs.

Cited by 30 publications

References 16 publications

Genetic analysis of agronomic and biochemical variables among different tomato (Solanum lycopersicum L.) accessions

Genetic analysis of agronomic and biochemical variables among different tomato (Solanum lycopersicum L.) accessions

Seleção de acessos de tomateiro resistentes à pinta-preta pela análise de agrupamento das curvas de progresso da doença

PRODUCTIVE POTENTIAL OF THE CHERRY TOMATO GENOTYPE GROUP BEFORE INFECTION BY Alternaria tomatophila

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