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Ward, J. M. J.; Nowell, D.C.

doi:10.1023/a:1009694632036

Cited by 21 publications

(3 citation statements)

References 40 publications

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“…GLS is prevalent in production areas characterized by dew formation in the morning, followed by hot, humid afternoons, and relatively cool nights (Shrestha et al, 2019). GLS has become increasingly important and is currently seen as one of the most serious yieldlimiting diseases of maize (Nutter Jr and Jenco, 1992;Ward and Nowell, 1998;Crous et al, 2006;Dhami et al, 2015). Previous studies have reported yield reductions of 260-320 kg/hm 2 due to outbreaks of GLS (Engelsing et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Fine Mapping of a New Major QTL-qGLS8 for Gray Leaf Spot Resistance in Maize

Qiu

Yang

et al. 2021

Front. Plant Sci.

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Gray leaf spot (GLS), caused by different species of Cercospora, is a fungal, non-soil-borne disease that causes serious reductions in maize yield worldwide. The identification of major quantitative trait loci (QTLs) for GLS resistance in maize is essential for developing marker-assisted selection strategies in maize breeding. Previous research found a significant difference (P < 0.01) in GLS resistance between T32 (highly resistant) and J51 (highly susceptible) genotypes of maize. Initial QTL analysis was conducted in an F2 : 3 population of 189 individuals utilizing genetic maps that were constructed using 181 simple sequence repeat (SSR) markers. One QTL (qGLS8) was detected, defined by the markers umc1130 and umc2354 in three environments. The qGLS8 QTL detected in the initial analysis was located in a 51.96-Mb genomic region of chromosome 8 and explained 7.89–14.71% of the phenotypic variation in GLS resistance in different environments. We also developed a near isogenic line (NIL) BC3F2 population with 1,468 individuals and a BC3F2-Micro population with 180 individuals for fine mapping. High-resolution genetic and physical maps were constructed using six newly developed SSRs. The QTL-qGLS8 was narrowed down to a 124-kb region flanked by the markers ym20 and ym51 and explained up to 17.46% of the phenotypic variation in GLS resistance. The QTL-qGLS8 contained seven candidate genes, such as an MYB-related transcription factor 24 and a C3H transcription factor 347), and long intergenic non-coding RNAs (lincRNAs). The present study aimed to provide a foundation for the identification of candidate genes for GLS resistance in maize.

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Section: Introductionmentioning

confidence: 99%

Fine Mapping of a New Major QTL-qGLS8 for Gray Leaf Spot Resistance in Maize

Qiu

Yang

et al. 2021

Front. Plant Sci.

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“…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%

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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“…Yield has increased up to 1.5 Mg ha -1 in corn hybrids susceptible to foliar pathogens and 0.38 Mg ha -1 in tolerant hybrids with a strobilurin fungicide such as pyraclostrobin (carbamic acid, and respiration of the infected tissue (Venancio et al, 2003). The goal for most fungicide applications is to suppress or eliminate foliar infections, especially in the upper canopy, in order to maintain photosynthetic efficiency (Ward & Nowell, 1998). This is critical because yield is a direct function of photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Corn Yield Response to Pyraclostrobin with Foliar Fertilizers

Shetley¹,

Nelson²,

Stevens³

et al. 2015

JAS

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Strobilurin fungicides, including pyraclostrobin, protect many crops from several fungal pathogens and create opportunities to increase plant health and yields. However, corn (Zea mays L.) and many other plants' physiological responses to pyraclostrobin include increases in processes that require nutrients. By applying foliar fertilizers, growers can adjust their nutrient-management strategy based on the plant's reaction to pyraclostrobin. Identifying plants' increased nutrient demands and meeting them with a foliar fertilizer at the time of fungicide application (tasselling) could increase yields. This study evaluated effects of foliar-applied pyraclostrobin at 0.11 kg ha-1 a.i. with or without 13 commonly available foliar fertilizers on yield, tissue macro-and micronutrient concentrations, severity of disease, and grain quality. Field research occurred at three University of Missouri research centers from 2008-2009. One foliar fertilizer, 0-0-30-0, caused up to 20% crop injury. Diseases affected plants in all six site-years, but overall severity was low (≤ 2%) and likely did not impact crop performance. Pyraclostrobin increased ear leaf B and Cu concentrations over all site-years seven days after treatment, and decreased N concentrations at one site-year. Grain yields increased 5% at two research sites with pyraclostrobin, and one location had increased grain moisture and grain oil at harvest. One foliar fertilizer, 30-0-0-0, increased grain yields by 10% at two sites compared to the non-treated control. However, foliar fertilizers showed no observable effects on grain quality characteristics, and none of the foliar fertilizers negatively impacted grain yield.

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Cited by 21 publications

References 40 publications

Fine Mapping of a New Major QTL-qGLS8 for Gray Leaf Spot Resistance in Maize

Fine Mapping of a New Major QTL-qGLS8 for Gray Leaf Spot Resistance in Maize

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

Corn Yield Response to Pyraclostrobin with Foliar Fertilizers

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