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    Resistance of maize landraces from Mexico to aflatoxin contamination: influence of aflatoxin-producing fungi genotype and length of incubation

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    Journal Article (439.1Kb)
    Date
    2021-09-15
    Author
    Ortega-Beltran, A.
    Jaime, R.
    Cotty, P.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Aflatoxin contamination is common in several crops, including maize, in warm agricultural areas. For over 40 years, there have been many efforts to develop maize germplasm with resistance to aflatoxin contamination produced by Aspergillus flavus Link:Fr. In Mexico, there are native maize landraces (MLRs) with superior resistance to both aflatoxin contamination and kernel rot by A. flavus. Resistance mechanisms for some MLRs have been characterized. We investigated whether MLRs vary in susceptibility to multiple members of several aflatoxin-producing species and if resistance is affected by length of the infection period. Results indicate significant differences (P < 0.05) in abilities to produce aflatoxin within and among aflatoxin-producing fungi in two MLRs during two infection periods. There were also significant (P < 0.05) differences among several MLRs and a commercial hybrid control to both aflatoxin accumulation and kernel rot in laboratory assays over a 25-day period. The current results suggest breeding for aflatoxin resistance in maize should include several variables. To be broadly useful, commercially acceptable resistant maize germplasm must be resistant to diverse aflatoxin-producing species over time frames and under conditions the maize is exposed to both in the field and during storage.
    Acknowledgements
    We are grateful to all maize farmers who donated the maize landrace accessions used in this study.
    https://dx.doi.org/10.1007/s10658-021-02385-7
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7785
    IITA Authors ORCID
    Alejandro Ortega-Beltranhttps://orcid.org/0000-0003-3747-8094
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s10658-021-02385-7
    Research Themes
    Plant Production and Health
    IITA Subjects
    Aflatoxin; Agronomy; Food Security; Maize; Plant Breeding; Plant Health; Plant Production
    Agrovoc Terms
    Aflatoxins; Resistance; Maize; Breeding; Plant Breeding
    Regions
    Latin America
    Countries
    Mexico
    Hubs
    Headquarters and Western Africa Hub
    Journals
    European Journal of Plant Pathology
    Collections
    • Journal and Journal Articles4835
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