Genetic parameters and selection for resistance to bacterial spot in recombinant F6 lines of Capsicum annuum

Riva-Souza, Elaine Manelli; Rodrigues, Rosana; Sudré, Cláudia Pombo; Pereira, Messias Gonzaga; Bento, Cíntia dos Santos; Matta, Frederico de Pina

doi:10.12702/1984-7033.v09n02a02

Cited by 8 publications

(14 citation statements)

References 19 publications

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“…Para a avaliação pela escala de notas (NOTA), considerando o ponto de corte igual a 2,00, as linhas 1, 6, 8, 11, 13 e 17 foram consideradas resistentes. O ponto de corte igual a 2,00, sugerido por Riva-Souza et al (2009), foi baseado nas notas dos genitores das linhas que estavam sendo avaliadas, nas quais o maior número de indivíduos do genitor suscetível obtiveram notas superiores a 2,00, e o genitor resistente apresentou somente plantas com notas inferiores a 2,00. Dentre as linhas consideradas resistentes pela avaliação da escala de notas, destacou-se as LR 1 e LR 8, que tiveram nota inferior ao genitor resistente (UENF 1381).…”

Section: Resultsunclassified

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Resistência à mancha-bacteriana e características agronômicas de linhas recombinadas de Capsicum annuum L.

Moreira

Rodrigues

Sudré

et al. 2015

Agraria

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RESUMOO objetivo deste trabalho foi avaliar a reação à mancha-bacteriana (RMB) e o desempenho agronômico de 18 linhas recombinadas, provenientes do cruzamento entre um pimentão suscetível (UENF 1421) e uma pimenta resistente (UENF 1381). Para RMB, seis plantas de cada genótipo foram conduzidas em casa de vegetação, e inoculadas com suspensão bacteriana na concentração de 10 5 ufc mL -1 . A avaliação foi realizada por dois métodos: a escala de notas, variando entre 1 (resistente) e 5 (suscetível) e pela área abaixo da curva de progresso da doença. Para o desempenho agronômico, foi instalado um experimento em campo, conduzido em blocos ao acaso, onde se avaliou a produção e padrão de frutos, arquitetura da planta e a presença de capsaicina. Os dados foram submetidos à análise de variância, agrupando-se as médias pelo teste Scott Knott e foram estimados os parâmetros genéticos. Cinco linhas foram resistentes à mancha-bacteriana. Destacaram-se as linhas pungentes 8 e 13, por seu número e massa média de frutos de formato cônico; a linha 11, pelo formato do fruto e porte anão foi indicada para utilização como ornamental. A linha 1, não-pungente, destacou-se, pelo formato cônico e por frutos de 13 gramas. Palavras-chave:Desempenho agronômico, parâmetros genéticos, pimenta, pimentão, Xanthomonas euvesicatoria Bacterial spot resistance and agronomic characteristic in Capsicum annuum recombinant inbred lines ABSTRACTThe aim of this work was to evaluate the bacterial spot resistance and the agronomic performance of 18 recombinant lines from crosses between a susceptible sweet pepper (UENF 1421) and a resistant chili pepper (UENF 1381). For bacterial spot resistance, six plants of each line were grown under greenhouse conditions and inoculated with a bacterial suspension in a 10 5 cfu mL -1 concentration. The evaluation were done using two methods: a rate scale, from 1 (resistant) to 5 (susceptible) and calculating area under progress disease curve. The agronomic performance estimate, an experiment was carried out in randomized block design, which evaluated the pattern and production of fruit, plant architecture and the presence of capsaicin. The data were submitted to analysis of variance, Scott Knott test of mean clustering and genetic parameters were estimated. Five lines were resistant to BS. Lines 8 and 13, had higher yield of pungent fruits in a conical shape. Line 11 has a potential considering ornamental purposes, since it has a small size of the plant. Line 1, is a non-pungent type, by its conical shape and fruit of 13 grams.

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Section: Resultsunclassified

“…Esta doença pode causar danos foliares significativos, tanto em ambiente protegido quanto no campo, acarretando perda da produção e da qualidade dos frutos (Jones et al, 2004;Marcuzzo et al, 2009;Riva-Souza et al, 2009;Hamza et al, 2010).…”

Section: Introductionunclassified

Resistência à mancha-bacteriana e características agronômicas de linhas recombinadas de Capsicum annuum L.

Moreira

Rodrigues

Sudré

et al. 2015

Agraria

Self Cite

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“…For quantitative resistance, evaluations started when the first symptoms were detected, in this case, on the fifth day after inoculation, lasting for nine days and occurring daily at the same time. To do so, scores from 1 to 5 were given according to the scoring range proposed by Riva-Souza et al (2009). Scores from 1 to 2 were assigned as resistant genotypes, and from 3 to 5 as susceptible, so that the higher the score, the greater the susceptibility to the disease.…”

Section: Exp11 -Resistance Assessment To Bsmentioning

confidence: 99%

“…These include bacterial spot (Xanthomonas spp), anthracnose (Colletotrichum spp), and Pepper yellow mosaic virus (PepYMV) (Riva-Souza et al, 2009;Bento et al, 2013;Diao et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The latter is the most effective among the control measures. Several studies have aimed to understand the interaction between Capsicum and Xanthomonas (Jones et al, 2004;Vallejos et al, 2010;Ryan et al, 2011;Potnis et al, 2012), seeking for resistance sources (Costa et al, 2002;Riva-Souza et al, 2009;Moreira et al, 2013) by characterization of the gene expression (Jones et al, 1998;Riva et al, 2004b;Kiss et al, 2016), genetic inheritance (Riva et al, 2004a), developing molecular markers for resistance genes (Holdsworth and Mazourek, 2015), and use of transgenics (Zipfel and Jones, 2015). Despite these studies, few pure line cultivars that are resistant to BS are available in the seed market.…”

Section: Introductionmentioning

confidence: 99%

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Research Article Multiple genetic resistances in Capsicum spp.

Bento¹,

Souza²,

Sudré³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. This study aimed to identify Capsicum genotypes with resistance to bacterial spot (BS), anthracnose and Pepper yellow mosaic virus (PepYMV). Fifty-four genotypes of Capsicum spp were evaluated. Resistance reaction against BS was evaluated using three replicates, testing hypersensitivity and quantitative resistance in leaves. After evaluation, inoculated leaves were detached from the plants, being then cultivated until reproductive stage for evaluations anthracnose resistance in immature and mature fruit, totalizing 18 fruits per genotype. For PepYMV resistance was performed with five replications. Each genotype reaction was evaluated by a scoring scale, using the area under the disease progress curve for each pathosystem, and incubation period for the three systems. The latent period was evaluated only for the pathosystem Capsicum-Colletotrichum gloeosporioides. Means were grouped by the Scott-Knott test. Measures of dissimilarity matrix among the genotypes were obtained by Gower's algorithm and the grouping was obtained by the UPGMA clustering method. The accessions belonging to the Capsicum frutescens were the most susceptible to the three diseases. At least one genotype of Capsicum baccatum var. pendulum, Capsicum annuum, and Capsicum chinense showed resistance potential to BS and PepYMV, for use in breeding programs. The accession UENF 1381 (C. annuum) was resistant to the three pathogens.

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Associating REML/BLUP and pedigree in developing sweet pepper (Capsicum annuum L.) progenies resistant to bacterial spot

et al. 2020

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Genetic parameters and selection for resistance to bacterial spot in recombinant F6 lines of Capsicum annuum

Abstract: - 032, 316, 399, 434, and 517, these will be used in the next steps of the sweet pepper breeding program.

Cited by 8 publications

References 19 publications

Resistência à mancha-bacteriana e características agronômicas de linhas recombinadas de Capsicum annuum L.

Resistência à mancha-bacteriana e características agronômicas de linhas recombinadas de Capsicum annuum L.

Research Article Multiple genetic resistances in Capsicum spp.

Associating REML/BLUP and pedigree in developing sweet pepper (Capsicum annuum L.) progenies resistant to bacterial spot

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