had a major impact on reduced food costs and improved nutrition in the developing countries, particularly among the poor. The semidwarfing genes in wheat and rice have also led to increased yields in developed countries (Chang, 1988; Dalrymple, 1980).

In general, IARCs working on legumes, root crops, and vegetables were established more recently than those that focused on rice, wheat, and maize. Germplasm collections are less complete for these crops than they are for the major cereal crops (particularly for related wild species), with the exception of peanuts, potatoes, and tomatoes (Lyman, 1984). Therefore, the impact of varieties developed from IARC-related germplasm is less dramatic, but the successes are mounting. In