Effectiveness of wheat genes for stem rust resistance

Abstract

The wheat stem rust, caused by Puccinia graminis Pers. f. sp. tritici Erikss. et Henn., has been observed in many locations in Yugoslavia. It occurs frequently in hilly regions in which the vegetation period is longer. However, intensity of its attack is relatively low and epidemics have not been noticed for a long time. The use of resistant cultivars is the most effective, economical and environmentally safe means of control. The base for a successful selection of wheat for resistance to the agent of stem rust is the knowledge of host- parasite interaction. The aim of this study was to assess the effectiveness of wheat genes for resistance to different pathotypes of stem rust in Yugoslavia. The most effective genes of wheat to stem rust resistance in Yugoslavia in 1995 and 1996 were Sr 9e (98.76-100%), Sr 11 (88.82-96.76%), Sr 26 (92.55-96.30%), Sr 29 (95.66-99.54%), Sr 31 (93.17-94.45%), Sr 32 (82.61-95.84%) and Sr 33 (99.08-99.38%).