Ontario Pork

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Prairie Swine Centre is an affiliate of the University of Saskatchewan


Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.

Financial support for the Enterprise Model Project and Pork Insight has been provided by:



Author(s): K. Peter Pauls
Publication Date: August 9, 2012
Reference: Department of Plant Agriculture, University of Guelph
Country: Canada

Summary:

Fusarium causes ear rot in corn and commercial strains of corn have little or no resistance to the disease. Environmental factors largely control the spread of the disease which can reach epidemic levels and cost Canadian farmers millions in potential profit. If growing conditions are poor, mycotoxins can be wide spread in crops, the mycotoxins are difficult to break down and cook out so they remain in animal feed and human food. Even small doses in pig feed can extend the time it takes pigs to reach market weight, and larger levels can cause reproductive problems. It is difficult to create resistance to fusarium because the disease is so variable, and even shows up in highly controlled conditions. This makes it difficult to find resistant genes in the plant. The use of molecular makers aid in finding good genes as they can be taken off of seedlings and analyzed in a lab setting. This project attempts to find the gene that is resistant to ear rot and to develop gene based markers for ear rot. The experiment was able to identify several resistant genes which were converted to markers that can easily be scored to allow rapid introgression into elite corn germplasm. The short-term outcome of the work is that it identified a set of gene-based markers linked to Fusarium resistance that can be used by plant breeders to select for resistance in natural sources. The identification of genes associated with resistance could also be exploited to develop transgenic plants over expressing these genes that may have enhanced resistance to Fusarium.

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