Screening of three sweet potato (Ipomoea batatas L.) cultivars for resistance to different virulence groups of root-knot nematodes (Meloidogyne spp.) under controlled conditions

Piedra-Buena, Ana; López-Pérez, José Antonio; Díez-Rojo, M. A.; Robertson, Lee; Castro-Lizazo, Iván; Bello, A.

doi:10.1016/j.cropro.2010.09.006

Cited by 7 publications

(9 citation statements)

References 23 publications

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“…Com base em sua capacidade de infectar diferentes hospedeiras, têm sido identificadas quatro raças de M. incognita e M. javanica e três raças de M. arenaria (CARNEIRO et al, 2003;PIEDRA-BUENA et al, 2011). Aparentemente as quatro raças de M. incognita atacam a batata-doce e a capacidade parasitária de cada uma delas varia segundo a suscetibilidade da planta, constituindo-se a espécie mais importante do gênero para a cultura, pois apresenta distribuição circumglobal .…”

Section: As Espécies Deunclassified

“…Com a redução do uso de nematicidas nas últimas décadas, há uma necessidade crescente de desenvolver variedades resistentes (CERVANTES-FLORES, 2000). A resistência genética em plantas, sempre que disponível, é o método de controle dos nematoides do gênero Meloidogyne mais eficiente, economicamente sustentável, ambientalmente seguro, não precisa técnicas de aplicação especiais e contribui para reduzir os períodos de rotação de culturas (CERVANTES-FLORES et al, 2002b;MELO et al, 2011;MONTES et al, 1998;PIEDRA-BUENA et al, 2011).…”

Section: Mayaguensis)unclassified

“…Com base em sua capacidade de infectar diferentes hospedeiras, têm sido identificadas quatro raças de M. incognita e M. javanica e três de M. arenaria (CARNEIRO et al, 2003;PIEDRA-BUENA et al, 2011).…”

Section: Introductionunclassified

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Caracterização morfoagronômica, físico-química e tolerância ao nematoide-das-galhas de genótipos de batata-doce avaliados no Distrito Federal

Carmona¹

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Section: As Espécies Deunclassified

Section: Mayaguensis)unclassified

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Caracterização morfoagronômica, físico-química e tolerância ao nematoide-das-galhas de genótipos de batata-doce avaliados no Distrito Federal

Carmona¹

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“…To increase efficiency in the characterizations of resistant genotypes, primary phenotypic screening analyses should include additional assessments of physiological responses to nematode infection. The development of successful RKN resistant sweet potato breeding programs is dependent on the identification of new RKN resistant sweet potato cultivars (Cervantes et al, 2002;Piedra-Buena et al, 2011). The conserved use of existing resistant cultivars may contribute to increased pathogen aggressiveness resulting in epiphytotic conditions.…”

Section: Introductionmentioning

confidence: 99%

“…When RKN infect sweet potatoes, symptoms are demonstrated as round, spindle-shaped galls and definitive cracks and necrosis in tubers resulting in severe yield losses of 10.2% and reduced marketability of storage roots (Suzuki et al, 2012;Nicol et al, 2011;Overstreet, 2009;Sasser and Frekman, 1987;Bonsi and Phills, 1979). Primary evidence of RKN resistance in sweet potato is often measured through assessments of root-gall indices, root-necrosis, and counts of eggs and egg masses (Piedra-Buena et al, 2011;CervantesFlores et al, 2002;Bonsi and Phills, 1979). To increase efficiency in the characterizations of resistant genotypes, primary phenotypic screening analyses should include additional assessments of physiological responses to nematode infection.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of root-knot nematode resistance in sweetpotato

Bernard¹,

Egnin²,

Bonsi³

et al. 2017

Afr. J. Agric. Res.

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Five healthy, vigorous cultivars of sweet potato [Ipomoea batatas (L.) Lam] were cultivated under rootknot nematode Meloidogyne incognita challenge to distinguish levels of resistance to infection. Roots and soil samples were collected 84 days' post-infection and evaluated for specific host responses to nematode infection by visual screening analysis and quantitative assessments of symptoms of infection. Resistant control cultivar Nugget showed the highest degree of resistance manifested in lower necrosis and galling, high fresh root weights and low nematode and egg counts. Necrosis and galling scores were highest in susceptible cultivars Georgia Jet and DMO1 where extensive root cracking was observed in Georgia Jet, and storage root development was severely restricted in DMO1 which also produced the highest egg counts. TUO2 and Whatley Loretan were considered intermediately resistant based on egg counts and necrosis and galling. Our results suggest that genotypic differences between cultivars were apparent in multiple host responses to root-knot nematode infection. We have also provided initial evidence to support the identification of newly developed sweet potato cultivars with intermediate resistance to root-knot nematodes.

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Resistance sources to root-knot nematodes Meloidogyne javanica, M. incognita and M. enterolobii in sweet potato

et al. 2020

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ABSTRACT One of the main obstacles for food production in many developing countries, as in Brazil, is the damage caused by root-knot nematodes, mainly those belonging to the genus Meloidogyne. This study aimed to assess the resistance levels of 44 sweet potato genotypes to M. javanica, M. incognita race 1 and M. enterolobii. These researches were carried out in 2014, under greenhouse conditions in Brasília-DF, Brazil. A completely randomized design with six replicates of one plant/plot/treatment was used. We determined the gall index (GI) and egg mass index (EMI) in the root system of each plant, the number of eggs and juveniles per gram of root with galls and the nematode reproduction factor. M. javanica was less aggressive and reproduced in only 9.09% of the evaluated genotypes; M. incognita race 1 was intermediate (47.73%); whereas M. enterolobii was more aggressive, with a population increase in 79.55% of the genotypes. The genotypes CNPH 1200, CNPH 1219, CNPH 1292, CNPH 1392, CNPH 60 and ‘Coquinho’ were the most resistant to the three species and can be used in breeding programs for multiple resistance to root-knot nematodes.

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Screening of three sweet potato (Ipomoea batatas L.) cultivars for resistance to different virulence groups of root-knot nematodes (Meloidogyne spp.) under controlled conditions

Cited by 7 publications

References 23 publications

Caracterização morfoagronômica, físico-química e tolerância ao nematoide-das-galhas de genótipos de batata-doce avaliados no Distrito Federal

Caracterização morfoagronômica, físico-química e tolerância ao nematoide-das-galhas de genótipos de batata-doce avaliados no Distrito Federal

Evaluation of root-knot nematode resistance in sweetpotato

Resistance sources to root-knot nematodes Meloidogyne javanica, M. incognita and M. enterolobii in sweet potato

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