Race Analysis of Puccinia Striiformis f.sp. Tritici in Iran

Abstract

Globally, wheat is an important crop; as a strategic plant it occupies the largest area of cultivation. Puccinia striiformis f.sp. tritici, known as yellow rust, caused the embrace damage and epidemic in Iran. Resistance cultivars are known to be the best way to control and prevent the spread of rust. This research studied the genetics of the pathogenicity of 26 isolates of stripe rust from different important wheat-growing areas in Iran; 56 differential and isogenic lines were used with a Bolani susceptible check, under greenhouse condition. Race 6E6A+,Yr27 from Neishabour (Eshgh Abad) and 7E22A+,Yr27 from Kermanshah were found to be less aggressive races in this research and races 206E182A+,Yr27 from Islam Abad, 207E190A+,Yr27 from Fars and race 231E150A+,Yr27 from Mashhad, with more than 19 known wheat genes, were the most aggressive races. Results of this research were that virulence was observed on plants with genes Yr1, Yr2, Yr3, Yr6, Yr7, Yr8, Yr9, Yr18, Yr21, Yr25, Yr26, Yr28, Yr29, Yr31, Yr32, YrSU, YrND, YrCV and YrA. No virulence was detected on plants with genes Yr4, Yr5, Yr10, Yr15, Yr24 and YrSP.