Theses & Dissertations Open Access Breeding for resistance to stem rust in bread wheat F.M. Nzuve Stem rust disease caused by Puccinia graminis f. sp. tritici (Eriks and E. Henn) poses the greatest threat to global wheat production due to the emergence of a highly virulent race of the Puccinia graminis f. sp. tritici Ug99 race and its … RUF-35820 2015 CC BY 4.0 28 Jan 2016