This invention relates to methods of identifying and/or selecting soybean plants or germplasm that display improved antibiosis and/or antixenosis resistance to one or more biotypes of soybean aphid. In certain examples, the method comprises detecting at least one marker, haplotype, or marker profile that is associated with improved soybean aphid resistance. Also included are plants selected by the given methods and primers, probes, and kits useful for such methods.
