Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/2006
Publication Date: 12/15/2006
Citation: Kim, E.E., Hartman, G.L. 2006. Mapping fusarium solani f. sp. glycines resistant loci in soybean. Phytopathology. 96:S16. Interpretive Summary:
Technical Abstract: Sudden death syndrome (SDS) of soybean (Glycine max L. Merr.) is an important soybean disease caused by the soil-borne fungus Fusarium solani f. sp. glycines. Yield loss from SDS in severely affected areas can range from slight to nearly 100 percent. The most viable option for SDS disease management is to develop cultivars with field resistance to SDS. The main objective of the research was to identify simple sequence repeat (SSR) markers linked to SDS resistance in two recombinant inbred line populations. The populations were derived from crosses between PI 243530 and Spencer, and PI 507531 and Spencer; PI 243530 and PI 507531 are partially resistant to SDS, and Spencer is susceptible to SDS. A total of 295 SSR primers from all 20 linkage groups were selected at 20 cM intervals from the soybean genetic linkage map for each parent. Subsequently, two populations were evaluated with polymorphic SSR markers identified during the parent screening. Plants were evaluated for disease severity in the greenhouse using the cone layer inoculation method. Both populations were set up in a randomized block design with eight replications. Markers associated with SDS resistance were found in both populations.