Efikasnost gena otpornosti ječma prema prouzrokovaču pepelnice

Abstract

U radu je dat pregled efikasnosti nekih Ml gena otpornosti ječma prema prouzrokovaču pepelnice u pet lokaliteta na području Srbije (Kragujevac, Zaječar, Kruševac, Vršac i Peć). Utvrđeno je da su najefikasniji bili geni Ml-a16, Ml-a17, Ml-a18, Ml-a19 i ml-05. Zadovoljavajući stepen efikasnosti ispoljili su i Ml-a, Ml-a3, Ml-a9, Ml-a13, Ml-p i Ml-at, dok su ostali geni (Ml-a6, Ml-a8, Ml-a12, Ml-g, Ml-c, Ml-k, Ml-nn, Ml-41/145, Ml-h i Ml-La) bili neefikasni.

The barley powdery mildew is very spread in Serbia. Good results in the control of this disease could be realized by growing of resistant cultivars. Investigation was carried out during 1991-1992 in five localities (Kragujevac, Zaječar, Kruševac, Vršac and Peć). Artificial inoculation was made only in Kragujevac. The results show that the genes ml-05, Ml-a16, Ml-a17, Ml-a18 and Ml-a19 were the most effective. There are no virulence alleles to this genes in our population. The genes Ml-a, Ml-a3. Ml-a9, Ml-a13, Ml-p i Ml-at had the middle efficiency (coefficient of infection 2,2-9,8). The other genes (MI-a6, Ml-a8, Ml-a12, Ml-g, Ml-c, Ml-k, Ml-nn, Ml-41/145, Ml-h and Ml-La) were not effective .