Working Document Series Open Access Field Screening of Bread Wheat for Partial Sources of Resistance to Stem Rust S. Bhavani · P. Njau · F.M. Nzuve · G. Tusiime The stem rust Puccinia graminis tritici race ug99 (TTKSK) and its variants results into wheat grain losses ranging from 70- 100%. This study was set up at the Kenya Agricultural Research Institute (KARI), Njoro to identify sources of parti… RUF-31552 2012 CC BY 4.0 8 Oct 2013