Genetics of flea beetle (Phyllotreta cruciferae) resistance in the Brassicacea

Sinapis alba is a valuable source for introgression of insect resistance into canola (Brassica napus L.). This research attempted to identify genetic sources of flea beetle (Phyllotreta cruciferae) resistance within a hybrid Brassica napus/ Sinapis alba population and determine the genetic basis of this resistance using molecular markers. In total, 66 cDNA/genomic markers were positioned on 18 linkage groups in the initial development of a genetic map of the Brassica napus double haploid population designated as 98-B-4. Analysis for whole seed quality parameters and cotyledon fatty acid profile indicate that flea beetle resistance may be linked to seedling fatty acid quality elements as opposed to whole seed quality components. This research illustrates the potential to introgress DNA from the wild relative S. alba into B. napus and the value that this material may have in transferring novel genetic traits into modern cultivars of canola.