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Open AccessEditor’s ChoiceArticle

Diverse Components of Resistance to Fusarium verticillioides Infection and Fumonisin Contamination in Four Maize Recombinant Inbred Families

1
School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA
2
Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC 27695 USA
3
Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA
4
Plant Science Research Unit, United States Department of Agriculture–Agricultural Research Service, Raleigh, NC 27695, USA
*
Authors to whom correspondence should be addressed.
Toxins 2019, 11(2), 86; https://doi.org/10.3390/toxins11020086
Received: 29 November 2018 / Revised: 8 January 2019 / Accepted: 22 January 2019 / Published: 1 February 2019
(This article belongs to the Special Issue Recent Advances in Fusarium Research)
The fungus Fusarium verticillioides can infect maize ears, causing Fusarium ear rot (FER) and contaminating the grain with fumonisins (FUM), which are harmful to humans and animals. Breeding for resistance to FER and FUM and post-harvest sorting of grain are two strategies for reducing FUM in the food system. Kernel and cob tissues have been previously associated with differential FER and FUM. Four recombinant inbred line families from the maize nested associated mapping population were grown and inoculated with F. verticillioides across four environments, and we evaluated the kernels for external and internal infection severity as well as FUM contamination. We also employed publicly available phenotypes on innate ear morphology to explore genetic relationships between ear architecture and resistance to FER and FUM. The four families revealed wide variation in external symptomatology at the phenotypic level. Kernel bulk density under inoculation was an accurate indicator of FUM levels. Genotypes with lower kernel density—under both inoculated and uninoculated conditions—and larger cobs were more susceptible to infection and FUM contamination. Quantitative trait locus (QTL) intervals could be classified as putatively resistance-specific and putatively shared for ear and resistance traits. Both types of QTL mapped in this study had substantial overlap with previously reported loci for resistance to FER and FUM. Ear morphology may be a component of resistance to F. verticillioides infection and FUM accumulation. View Full-Text
Keywords: maize; mycotoxins; fumonisin; disease resistance; morphology maize; mycotoxins; fumonisin; disease resistance; morphology
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MDPI and ACS Style

Morales, L.; Zila, C.T.; Moreta Mejía, D.E.; Montoya Arbelaez, M.; Balint-Kurti, P.J.; Holland, J.B.; Nelson, R.J. Diverse Components of Resistance to Fusarium verticillioides Infection and Fumonisin Contamination in Four Maize Recombinant Inbred Families. Toxins 2019, 11, 86.

AMA Style

Morales L, Zila CT, Moreta Mejía DE, Montoya Arbelaez M, Balint-Kurti PJ, Holland JB, Nelson RJ. Diverse Components of Resistance to Fusarium verticillioides Infection and Fumonisin Contamination in Four Maize Recombinant Inbred Families. Toxins. 2019; 11(2):86.

Chicago/Turabian Style

Morales, Laura; Zila, Charles T.; Moreta Mejía, Danilo E.; Montoya Arbelaez, Melissa; Balint-Kurti, Peter J.; Holland, James B.; Nelson, Rebecca J. 2019. "Diverse Components of Resistance to Fusarium verticillioides Infection and Fumonisin Contamination in Four Maize Recombinant Inbred Families" Toxins 11, no. 2: 86.

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