Resistance to Fumonisins and Fusarium Ear Rot of Corn
Clements, Michael Joe
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https://hdl.handle.net/2142/85004
Description
Title
Resistance to Fumonisins and Fusarium Ear Rot of Corn
Author(s)
Clements, Michael Joe
Issue Date
2002
Doctoral Committee Chair(s)
White, Donald G.
Department of Study
Crop Sciences
Discipline
Crop Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Genetics
Language
eng
Abstract
The objective of this research was to identify sources of resistance to fumonisin contamination and Fusarium ear rot of corn. This research has (i) identified isolates of F. verticillioides and F. proliferatum that produce high levels of fumonisin contamination under field conditions; (ii) adapted an enzyme-linked immunosorbent assay to rapidly and inexpensively quantify the concentration of fumonisin B 1, B2 and B3 from a large number of grain samples; (iii) identified an inoculation technique for Fusarium ear rot that differentiates between hybrids identified as resistant or susceptible under natural infection, and facilitates the efficient evaluation of a large number of corn genotypes each season; (iv) identified inbred lines with potential to improve the resistance of a Stiff Stalk Synthetic-derived line; (v) produced six generations of the most promising inbreds for studies of the inheritance of resistance and the identification of molecular markers associated with resistance; and (vi) evaluated the influence of CryIAb protein on fumonisin contamination and Fusarium ear rot when two lepidopteran species were predominant insect species. Results from this research will contribute to a reduction of fumonisin in commercial corn hybrids and help to minimize economic disruptions following any future regulation of fumonisins by the FDA.
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