Registration of N547 Maize Germplasm Line

D'Croz-Mason, Nora E.; Foster, John E.; Mason, Stephen

doi:10.2135/cropsci2002.3120

Cited by 4 publications

(2 citation statements)

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“…Plant resistance is considered to be one of the most desirable strategies for managing aflatoxin accumulation in maize. The development of aflatoxin resistant germplasm has been the primary emphasis of a number of research organizations, particularly the United States Department of Agriculture-Agricultural Research Service (USDA-ARS) ( Scott and Zummo, 1990 , 1992 ; Williams and Windham, 2001 , 2006 ; Williams et al, 2015 ). The USDA-ARS Corn Host Plant Resistance Research Unit located at Mississippi State, MS, United States, released the first two maize lines (Mp313E, Mp420) with resistance to kernel infection by A. flavus ( Scott and Zummo, 1990 , 1992 ).…”

Section: Introductionmentioning

confidence: 99%

“…The development of aflatoxin resistant germplasm has been the primary emphasis of a number of research organizations, particularly the United States Department of Agriculture-Agricultural Research Service (USDA-ARS) ( Scott and Zummo, 1990 , 1992 ; Williams and Windham, 2001 , 2006 ; Williams et al, 2015 ). The USDA-ARS Corn Host Plant Resistance Research Unit located at Mississippi State, MS, United States, released the first two maize lines (Mp313E, Mp420) with resistance to kernel infection by A. flavus ( Scott and Zummo, 1990 , 1992 ). More recently, four additional germplasm lines (Mp715, Mp717, Mp718, Mp719) with resistance to aflatoxin accumulation have been released ( Williams and Windham, 2001 , 2006 , 2012 ).…”

Section: Introductionmentioning

confidence: 99%

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A Histological Study of Aspergillus flavus Colonization of Wound Inoculated Maize Kernels of Resistant and Susceptible Maize Hybrids in the Field

et al. 2018

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Aspergillus flavus colonization in developing kernels of maize single-cross hybrids resistant (Mp313E × Mp717) and susceptible (GA209 × T173) to aflatoxin accumulation was determined in the field over three growing seasons (2012–2014). Plants were hand pollinated, and individual kernels were inoculated with a needle dipped in a suspension of A. flavus conidia 21 days after pollination. Kernels were harvested at 1- to 2-day intervals from 1 to 21 days after inoculation (DAI). Kernels were placed in FAA fixative, dehydrated, embedded in paraffin, sectioned, and stained with toluidine blue. Kernels were also collected additional kernels for aflatoxin analyses in 2013 and 2014. At 2 DAI, A. flavus hyphae were observed among endosperm cells in the susceptible hybrid, but colonization of the endosperm in the resistant hybrid was limited to the wound site of the resistant hybrid. Sections of the scutellum of the susceptible hybrid were colonized by A. flavus by 5 DAI. Fungal growth was slower in the resistant hybrid compared to the susceptible hybrid. By 10 DAI, A. flavus had colonized a large section of the embryo in the susceptible hybrid; whereas in the resistant hybrid, approximately half of the endosperm had been colonized and very few cells in the embryo were colonized. Fungal colonization in some of the kernels of the resistant hybrid was slowed in the aleurone layer or at the endosperm-scutellum interface. In wounded kernels with intact aleurone layers, the fungus spread around the kernel between the pericarp and aleurone layer with minimal colonization of the endosperm. Aflatoxin B1 was first detected in susceptible kernel tissues 8 DAI in 2013 (14 μg/kg) and 2014 (18 μg/kg). The resistant hybrid had significantly lower levels of aflatoxin accumulation compared to the susceptible hybrid at harvests 10, 21, and 28 DAI in 2013, and 20 and 24 DAI in 2014. Our study found differential A. flavus colonization of susceptible and resistant kernel tissues, and that the aleurone and the outer layer of the scutellum slowed the rate of colonization by A. flavus.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Histological Study of Aspergillus flavus Colonization of Wound Inoculated Maize Kernels of Resistant and Susceptible Maize Hybrids in the Field

et al. 2018

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Predictive model of aflatoxin contamination risk associated with granary-stored corn with versicolorin A monitoring and logistic regression

Jiang

Zheng

Wang

et al. 2019

Food Additives & Contaminants: Part A

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Effect of Environment on Resistance to the European Corn Borer (Lepidoptera: Crambidae) in Maize

Willmot¹,

Hibbard²,

Darrah³

et al. 2004

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The European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), is a major pest of maize, Zea mays L., in many temperate parts of the world. Genotype-by-environment interaction effects can make relative performance unpredictable and may hamper selection for resistance to European corn borer. The objective of this study was to determine the effect of environment on genotypic reaction to European corn borer resistance in maize. A set of 12 maize inbred lines was chosen to represent a range of European corn borer responses. Eleven testing environments ranged from Delaware, Ohio, Illinois, Iowa, Nebraska, Missouri, to Mississippi. For length of stalk tunneling, environmental and genotypic main effects (estimated by restricted maximum likelihood) were >20- and 10-fold larger than their interaction effect, respectively. Length of tunneling means for genotypes (across environments) ranged from 10.1 to 35.4 cm. Several putatively resistant genotypes grouped with the susceptible checks, B73 and Mol7. By breaking factors and the interaction into single degree of freedom components, we observed that GEMS-0001 had significant crossover interactions toward less susceptibility in both Mississippi and the Nebraska environments. Environments displaying several crossover interactions indicated that European corn borer screening at these sites would not necessarily apply to other locations, whether due to small differences in experimental conduct and/or environmental effects. The five most resistant genotypes were fairly consistent across environments. Because all environments except Illinois used larvae from the same insectary, and these environments differed in damage intensity and rankings, it is unlikely that insect biotype was a factor contributing to genotype-by-environment effects.

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Registration of N547 Maize Germplasm Line

Cited by 4 publications

References 0 publications

A Histological Study of Aspergillus flavus Colonization of Wound Inoculated Maize Kernels of Resistant and Susceptible Maize Hybrids in the Field

A Histological Study of Aspergillus flavus Colonization of Wound Inoculated Maize Kernels of Resistant and Susceptible Maize Hybrids in the Field

Predictive model of aflatoxin contamination risk associated with granary-stored corn with versicolorin A monitoring and logistic regression

Effect of Environment on Resistance to the European Corn Borer (Lepidoptera: Crambidae) in Maize

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