In field tests, Mp715 had lower levels of both fungal infection and aflatoxin contamination. Both qualities likely represent the most efficient and reliable way to reduce aflatoxin in corn grain. The ARS researchers are attempting to identify the genes responsible. Under cooperative research and development agreements, ARS scientists plan to evaluate 75 to 100 hybrids from the breeding programs of two seed companies this summer. Some companies have already incorporated in their breeding programs toxin-resistant germplasm that ARS released earlier.
Aflatoxin is produced by certain species of Aspergillus fungi.
Last year, corn aflatoxin levels soared in parts of the South because of record heat and drought. Two toxin-producing bacteria, Bordetella bronchiseptica and Pasteurella multocida , are the culprits in atrophic rhinitis. Current diagnostic methods take 5 to 7 days and aren't always reliable. The new test takes 3 days. Since the disease spreads quickly in swine confinement houses, detecting the bacteria sooner could cut losses.