Breeding resistance cultivars is the most economical, preferable, and effective method of control the wheat leaf rust caused by Puccinia recondita Roberge ex Desmaz. f.sp. tritici Eriks. & E. Henn. To date, fifty-six leaf rust resistance genes have been designated and mapped in wheat. The cultivars with single resistance gene released in wheat growing areas have quickly led to the selection for the corresponding virulence in the Puccinia recondita population, rendering the genes ineffective. Cont...