Investigation into Wheat Stripe Rust Pathogen in the Valley of Yili River of Xinjiang, China

【 Objective 】 The purpose of this project is to investigate the rust-infected Berberisheteropoda Schneid in spring wheat in order to accumulate data on the genetic diversity and virulence variation of Puccinia striiformis f. sp. tritici (Pst) population in Xinyuan of Xinjiang and the control of wheat stripe rust in China in the future.【 Method 】The race analysis was carried out with Chinese differentials for Pst from Xinyuan populations in 2013-2015. We also identified the species of B. heteropoda Schneid, extracted the DNA from aeciospores and PCR reactions were amplified.【 Result 】In Xinyuan, the main pathotypes were Hybrid46 group at a rate of 31.25%, Suwon 11 group at a rate of 22.92%, Guinong 22 group at a rate of 18.75%, Zhong 4 group at a rate of 6.25% and unclassified group at a rate of 20.83%. Aecia on B. heteropoda Schneid were identified at a rate of 4.7%-5.7% by PCR detection with specific molecular marker of Pst.【 Conclusion 】The pathotypes of Xinyuan populations consisted of Hybrid 46 group, Suwon 11 group, Guinong 22 group and other undesignated races. Aecia of Pst on B. heteropoda Schneid was identified at a rate of 4.7%-5.7% by PCR amplifications with molecular marker specific to Pst.