&lt;b&gt;History of northern corn leaf blight disease in the seventh cycle of recurrent selection of an UENF-14 popcorn population

Ribeiro, Rodrigo Moreira; Júnior, Antônio Teixeira do Amaral; Pena, Guilherme Ferreira; Vivas, Marcelo; Kurosawa, Railan Nascimento; Gonçalves, Leandro Simões Azeredo

doi:10.4025/actasciagron.v38i4.30573

Cited by 22 publications

(20 citation statements)

References 25 publications

(19 reference statements)

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“…These authors achieved a 29% increase in grain yield and 15% reduction of the NLB disease from C 0 to C 2 , demonstrating the potential for improvement of these traits through recurrent selection. In an evaluation of the history of the NLB disease in seven cycles of recurrent selection, Ribeiro et al (2016) concluded that selection was effective in maintaining the equilibrium of the disease in the improved population of popcorn UENF-14 and that the source of resistance was not lost with the advance of the selection cycles. These authors also stated that it is possible to combine genes for resistance to NLB with the other agronomic traits of interest.…”

Section: Resistance To Northern Leaf Blight (Nlb)mentioning

confidence: 99%

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Popcorn germplasm resistance to fungal diseases caused by Exserohilum turcicum and Bipolaris maydis

et al. 2017

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Section: Resistance To Northern Leaf Blight (Nlb)mentioning

confidence: 99%

“…When compared with cultivars of common corn, popcorn plants usually display greater susceptibility of pests and diseases occurrence (Arnhold 2008;Hallauer and Carena 2009;Ribeiro et al 2016). Among the leaf diseases affecting popcorn, the common blotch (northern leaf blight, NLB), caused by Exserohilum turcicum (Pass.)…”

Section: Introductionmentioning

confidence: 99%

Popcorn germplasm resistance to fungal diseases caused by Exserohilum turcicum and Bipolaris maydis

et al. 2017

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“…However, popcorn breeding is disadvantaged owing to the narrow genetic base of the available germplasm, which leads to lower performance of agronomic traits of interest, including greater susceptibility to pests and diseases (Hallauer and Carena, 2009;Ribeiro et al, 2016;Vieira et al, 2016). Thus, assessment of genotypes in relation to their levels of disease resistance becomes even more important (Vieira et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Helminthosporium turcicum Pass.) stands out due to its relevance (Scapim et al, 2010;Wang et al, 2014;Hurni et al, 2015), wherein favorable climatic conditions and susceptible hosts cause damage that may vary between 27 and 90% of the total grain production (Pataky, 1992;Ward and Nowell, 1998;Ferguson andCarson, 2007, Wang et al, 2010;Ding et al, 2015;Ribeiro et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Genetic variability affecting Exserohilum turcicum resistance in popcorn lines grown under high and low phosphorus conditions

et al. 2016

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ABSTRACT. Northern leaf blight (NLB), caused by Exserohilum turcicum, is one of the main foliar diseases that affect popcorn culture. Farmers use many control measures to minimize damage caused by this disease, among which, the use of cultivars with genetic resistance is the most effective and economical. The aim of this study was to investigate genetic variability influencing resistance to NLB in 25 popcorn maize lines grown under high and low phosphorus conditions in relation to foliar fungal disease caused by E. turcicum. We evaluated the disease incidence and severity, by analysis of variance and cluster test (Scott-Knott). There was sufficient genetic variability between strains for resistance traits. Genotypic variance was higher than environmental variance, and had more discriminatory power. We conclude that new progenies could be selected for the establishment of future populations. P-7, P-9, L-59, L-71, and L-76 progenies possess promising characteristics that simultaneously reduce the severity and the incidence of NLB in popcorn plants.

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Intercontinental trials reveal stable QTL for Northern corn leaf blight resistance in Europe and in Brazil

et al. 2020

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Key message NCLB is the most devastating leaf disease in European maize, and the introduction of Brazilian resistance donors can efficiently increase the resistance levels of European maize germplasm. Abstract Northern corn leaf blight (NCLB) is one of the most devastating leaf pathogens in maize (Zea mays L.). Maize cultivars need to be equipped with broad and stable NCLB resistance to cope with production intensification and climate change. Brazilian germplasm is a great source to increase low NCLB resistance levels in European materials, but little is known about their effect in European environments. To investigate the usefulness of Brazilian germplasm as NCLB resistance donors, we conducted multi-parent QTL mapping, evaluated the potential of marker-assisted selection as well as genome-wide selection of 742 F1-derived DH lines. The line per se performance was evaluated in one location in Brazil and six location-by-year combinations (= environments) in Europe, while testcrosses were assessed in two locations in Brazil and further 10 environments in Europe. Jointly, we identified 17 QTL for NCLB resistance explaining 3.57–30.98% of the genotypic variance each. Two of these QTL were detected in both Brazilian and European environments indicating the stability of these QTL in contrasting ecosystems. We observed moderate to high genomic prediction accuracies between 0.58 and 0.83 depending on population and continent. Collectively, our study illustrates the potential use of tropical resistance sources to increase NCLB resistance level in applied European maize breeding programs.

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<b>History of northern corn leaf blight disease in the seventh cycle of recurrent selection of an UENF-14 popcorn population

Cited by 22 publications

References 25 publications

Popcorn germplasm resistance to fungal diseases caused by Exserohilum turcicum and Bipolaris maydis

Popcorn germplasm resistance to fungal diseases caused by Exserohilum turcicum and Bipolaris maydis

Genetic variability affecting Exserohilum turcicum resistance in popcorn lines grown under high and low phosphorus conditions

Intercontinental trials reveal stable QTL for Northern corn leaf blight resistance in Europe and in Brazil

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