International Stem Rust and Stripe Rust Screening Kenya 2025-26

Under the GRDC project UOS2301-003RTX, we tested 427 modern and historical Australian wheat varieties (Ausvars) in Kenya against stem rust (Ug99 lineage pathotypes – TTKSK, TTKST, TTKTT, TTTTF and TTKTT+Sr8115B) and stripe rust (race PstS16) to identify rust resistant/susceptible germplasm to these exotic rust races. High quality stripe rust and stem rust phenotypic data was generated on these varieties. For each variety, there are 3 readings for stripe rust (YR) and 2 readings for stem rust (SR) recorded on a modified Cobb scale capturing Disease severity (% leaf area) and Disease response (reaction).