| Wheat is the primary staple cereal crop throughout the CWANA region, grown on over 50 million hectares. The region has the highest per capita consumption of wheat in the world. Wheat rusts are the main economically damaging diseases of wheat, with periodic epidemics recorded in recent decades in the CWANA region. The breakdown of resistance gene Yr9 in the 1980’s resulted in damaging stripe or yellow rust epidemics in several countries in East Africa, the Near East and West/South Asia, in which cultivars carrying this gene had come to dominate. ... |
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