Breeding for BYDV Tolerance/Resistance in CIMMYT Bread Wheats Targeted to Developing Countries

摘要

The occurrence of Barley yellow dwarf virus (BYDV) in certain developing countries is well documented (Lister and Ranieri, 1995). Mostly areas growing rainfed wheat are subject to losses associated with this disease that thrives under moderate temperatures and where precipitation is intermittent. Typical areas include the highland regions of Kenya and similar climatic settings in neighboring countries in the Eastern African Highlands, such as Burundi, Ethiopia, Rwanda, and Uganda. Also the wetter regions in Mediterranean North Africa may encounter occasional epidemics, such as in Algeria, Tunisia, and the cooler Atlas Mountain region of Morocco (El Yamani and Hill, 1990). In Latin America BYDV is common in Argentina, Brazil, Uruguay, and Chile (Ramirez, 1990), and in the cooler highlands of Bolivia, Colombia, Ecuador, Peru, Mexico (Burnett and Mezzalama, 1990), and Guatemala.