2007 Annual Report 1a.Objectives (from AD-416) To generate strategic knowledge on soybean rust distribution and variability in conjunction with breeding resistance to develop target resistant lines that are of value to the breeding programs in Africa and the U.S. 1b.Approach (from AD-416) Establish inoculation and field sites to test sources of resistance. Determine the genetics of resistance in selected resistant lines identified at the International Institute of Tropical Agriculture and develop markers that can aid marker-assisted breeding for resistance. 3.Progress Report This report serves to document research conducted with ARS and International Tropical Institute in Nigeria. Additional details of research can be found in the report for the parent project 3611-22000-019-00D, “Soybean Disease and Pest Management”. Additional crosses were made with lines representing sources of resistance from both U.S. and Nigerian evaluations to a rust susceptible cultivar. These additional crosses and crosses made the previous year will be used in inheritance and mapping studies. These crosses included one source of resistance from Uganda.