Title: Confirming QTL for aflatoxin resistance from Mp313E in different genetic backgrounds
Authors: Willcox M, Davis G, Warburton ML, Windham GL, Abbas HK, Betran J, Holland JB, Williams WP
Journal: Mol Breed
Accepted date: 2012 Nov 26
Interpretive summary: The fungus Aspergillus flavus (Link:Fr) causes ear rot of maize (Zea mays L.) and produces aflatoxin, which is toxic to humans and animals. Reducing aflatoxin in maize can be done via plant breeding, and the identification of genes that give resistance to maize against the fungus. These genes are identified by genetic mapping, and they can then be used to improve susceptible maize lines. We must first test that the genes from one resistant maize lines will behave in the same way in a new maize line and provide the same levels of resistance to all maize they are crossed into, and in all environments that the maize lines are grown in. This study is an attempt to find if the same genes or chromosomal regions from a resistant maize line, Mp313E, that gave resistance against the fungus when crossed with one susceptible maize line (B73) gives resistance when crossed with another susceptible maize line (Va35). Many of the same genes and regions were identified, as well as some new ones. We also tested the lines with these genes or regions in many environments, and found that some behave the same, but some do not, when grown in very different environments. These results will help guide future breeding efforts with Mp313E in making resistant maize inbred lines.
Publication date: 2013 Apr 9