Races of P. graminis f. sp. tritici with virulence to Sr13 and Sr9eOlivera PD, Yahyaoui A, Badebo A, Rattu A, Rouse M, Ward R, Singh R, Fetch T, and Jin Y

North American Rust WorkshopSt. Paul - June 12, 2011

Stem Rust Resistance in Durum Durum wheat of North America has a higher frequency of resistance to TTKSK than common wheat

We postulated that resistance to TTKSK in durum is mostly due to Sr13

Race Identification Samples

- 41 samples of infected stems collected at Debre Zeit stem rust screening nursery in 2009

38 single pustule isolates - race-typed based on the NA differential set - characterized on a set of 24 additional resistant lines Races:

- 18 IsolatesTTKSK - 12 IsolatesJRCQC - 4 IsolatesTRTTF

Infection Types on North American Differential Set of Races JRCQC, TRTTF, and TTKSK

GeneJRCQCTRTTFTTKSKSr5;144Sr21443+Sr9e43+4Sr7b23+4Sr11444Sr63+3+3+Sr8a22+24Sr9g444Sr3603+0Sr9b2+44

GeneJRCQCTRTTFTTKSKSr3022-43+Sr17+1333+22+Sr9a3+44Sr9d444Sr101+3;44SrTmp2-42+Sr242-22-Sr312-2-4Sr38;144McN444

Infection Types Produced by Races JRCQC, TRTTF, and TTKSK on Sr13 and Sr9e

Reaction of Race JRCQC in Durum Cultivars 8155-B28155-B1Iumillo-1MindumLeedsSceptreMedoraRustyKhapliVernalKubanka47-1SpelmarMindumSt464AcmeArnaukta

Infection types on 1AL.1RS of races JRCQC, TRTTF, and TTKSK

GeneJRCQCTRTTFTTKSK1AL.1RS2-322+

Race TRTTF Race TRTTF was first found in a collection from Yemen in 2006

TRTTF is similar to race RRTTF that was found from stem rust collections from Pakistan

Race RRTTF is avirulent to Sr9e and 1AL.1RS translocation

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