Sudden Death Syndrome (SDS) caused by Fusarium virguliforme (Fv) is currently the most damaging fungal soybean disease occurring in Minnesota. Soybean diseases are controlled most effectively and economically by breeding for disease resistance. No soybean genotype is completely resistant to SDS; instead the reaction of soybean to this disease is characterized as partial resistance involving multiple genes. New molecular techniques, particularly association mapping, make identification of multiple resistance genes feasible if quality disease phenotype data is available. Selection for this type of resistance is made complex by the fact that varietal resistance to SDS functions both in the...