The Screening of Pakistani Wheat Landraces to Stem Rust (Puccinia gramminis f. sp. tritici) resistance under field conditions.

The stem rust diseases of wheat have historically been the major biotic stress responsible for destabilizing production in Asia and other parts world .Stem has continuously surge destroying genome especially after its race Ug99 that surfaced Uganda year 1999 suppressed vital resistance gene Sr31.It was pivotal had immunity to against lethal fungus.In order trace genetic resources inside genome; a set 112 landraces evaluated under field condition at Jhuddo, hot spot southern Pakistan. results indicated 80% were susceptible intensity Jhuddo,4% moderately suscesptible,11% resistant while 17% shown moderetly types reactions according modified Cobbs Scale. .