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ARS Home » Southeast Area » Mississippi State, Mississippi » Crop Science Research Laboratory » Corn Host Plant Resistance Research » Research » Research Project #430973

Research Project: Identification of Genes for Resistance to Aflatoxin Accumulation in Maize

Location: Corn Host Plant Resistance Research

Project Number: 6064-21000-015-05-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Jul 1, 2016
End Date: Jun 30, 2019

Objective:
Identify genes and proteins that enhance resistance to Aspergillus (A.) flavus infection and aflatoxin accumulation in maize: (1) isolate and determine functions of genes associated with resistance to A. flavus infection and aflatoxin accumulation in maize; (2) compare expression patterns of genes associated with resistance in maize cultivars with varying levels of resistance or susceptibility to A. flavus/aflatoxin; (3) develop near isogenic lines with genes for resistance.

Approach:
Developing ears of maize will be inoculated with toxin-producing and non-toxin-producing strains of Aspergillus (A.) flavus at predetermined times after pollination, and tissue will be collected from both inoculated and non-inoculated ears at various intervals throughout the growing season. Maize and fungal proteins, RNA, and DNA will be extracted from tissue samples. Expression profiles of different tissues collected at various times from resistant and susceptible maize genotypes grown under different conditions will be compared using appropriate proteomic or genomic techniques. Genes and proteins identified in these studies will be developed as molecular markers for enhancing resistance to aflatoxin accumulation in maize hybrids.