Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: August 16, 1995
Publication Date: N/A
Technical Abstract: Cereal rust surveys coordinated by the Cereal Rust Laboratory (CRL) contribute to timely identification of pathogen virulence shifts in United States rust populations. New virulences often force major wheat cultivars to be abandoned, e.g., ProBrand 812 in the Southern Plains in 1986. Rust-screening programs at the CRL and other institutions identify new sources of rust resistance. Breeders' advanced lines are screened using regionally selected virulence populations based on survey rust collections. Virulence data from surveys and resistance genes identified through screening enable breeders to develop cultivars with essential new rust resistances. Protection provided by the prompt utilization of rust resistance can be estimated from yield loss data and cultivar acreages.