Title: Phenotypic and genetic characterization of a maize association mapping panel developed for the identification of new sources of resistance to Aspergillus flavus and aflatoxin accumulation resistance
Authors: Warburton ML, Williams WP, Windham GL, Murray S, Xu W, Hawkins LK, Franco J
Journal: Crop Sci
Accepted date: 2013 Jul 9
Interpretive summary: Maize (Zea mays L.) susceptibility to ear rot and aflatoxin accumulation by Aspergillus flavus (Link:Fr) causes significant economic and human health damage worldwide. Genetic resistance in maize would solve the problem, but no commercial varieties have enough resistance, and there are no populations of maize plants in which to study the trait. We have created a new population containing known and many potential new resistant lines, and here we present the lines, with genetic and phenotypic information including aflatoxin levels, maturity, corn earworm (Helicoverpa zea (Boddie) damage data, and fungal biomass (weight of the fungus in each kernel). In addition to confirming previously reported aflatoxin resistant lines, new resistant lines were identified, which can be used for breeding improved resistant germplasm. The Mexican landrace Tuxpeño is the original source of most of the resistant lines, but a few other novel sources will allow breeders to combine the best sources of resistance into new cultivars. Genetic characterization data presented here will also allow this resource to be used for association mapping of aflatoxin and identification of genes responsible for this important trait.
Publication date: 2013 Sep 27