Cloned cDNAs and genomic fragments that encode ADH1 and ADH2 have been isolated and characterized. More recently, we have isolated and characterized other genes involved in the anaerobic-response. Our present goal is to determine which structural features of these genes might explain their selective expression during anaerobiosis. Other members of this gene family are either expressed constitutively, or are inducible by light. This trait was found in some exotic maize accessions.
Genetic analysis indicates that tolerance is a fairly simple dominant trait.
Additionally, we found a recessive factor that increases flooding tolerance in plants that are null for ADH activity. Our goals are to isolate and characterize the genes involved in flooding tolerance and to determine the feasibility of using this trait in developing flooding tolerant inbred lines for breeding purposes. Stock Center continues to be housed in the UI Department of Crop Sciences, in 1992, ARS took over the day to day operations of the stock center and an ARS scientist was appointed as Director. Information about maize mutants and chromosomal aberrations as well as their use in biological research has been published over the years. The materials at the stock center are also available to educational institutions for teaching purposes.