Wheat stripe rust is a severe threat of almost all wheat-growing regions in the world. Being an obligate biotrophic fungus, f. sp. () produces new virulent races that break the resistance of wheat varieties. In this study, 115 progeny isolates were generated through sexual reproduction on susceptible Himalayan using a dominant Pakistani race (574232) of . The parental isolate and progeny isolates were characterized using 24 wheat single-gene lines and ten simple sequence repeat (SSR) markers. From the one-hundred-and-fifteen progeny isolates, 25 virulence phenotypes (VPs) and 60 multilocus genotypes were identified. The parental and all progeny isolates were avirulent to , , , , , , , , , , and and virulent to , , , , , , , , , , , , and . Based on the avirulence/virulence phenotypes, we found that VPs virulent to , , , , , and were controlled by one dominant gene; those to , , and by two dominant genes; and those to by two complementary dominant genes. The results are useful in breeding stripe rust-resistant wheat varieties and understanding virulence diversity.
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| http://dx.doi.org/10.3390/ijms21051685 | DOI Listing |
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