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Physiological specialization of Puccinia triticina on wheat in the United States in 2010.

Physiological specialization of Puccinia triticina on wheat in the United States in 2010. Jim Kolmer Dave Long Mark Hughes USDA-ARS Cereal Disease Laboratory St. Paul MN. Puccinia triticina 2010 - USA. 537 single uredinial isolates 40 virulence phenotypes total MLDS 30%

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Physiological specialization of Puccinia triticina on wheat in the United States in 2010.

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  1. Physiological specialization of Puccinia triticina on wheat in the United States in 2010. Jim Kolmer Dave Long Mark Hughes USDA-ARS Cereal Disease Laboratory St. Paul MN

  2. Puccinia triticina 2010 - USA • 537 single uredinial isolates • 40 virulence phenotypes total • MLDS 30% (Lr9, Lr17, Lr39/41) • TDBJG 23% (Lr2a, Lr24) • TCRKG 13% (Lr2a, Lr26, Lr11, Lr18)

  3. Virulence Phenotypes P. triticina 2010

  4. Virulence P. triticina 2010

  5. P. triticina regional populations - 2010

  6. Lr21 Virulence - 2010 Collections from MN-ND

  7. P. triticina SSR Groups 2010 • NA3 45% isolates 10 phenotypes • NA5 53% isolates 23 phenotypes • MLDSD- NA3 • MFPSB- NA3 • TDBJG - NA5 • TDBGG- NA5 • TCRKG- NA5

  8. Top 10 Kansas Wheat Cvs 2011 • TAM 111- Lr17 • Fuller- Lr17,Lr39/41 • Art- Lr17+ • Postrock- Lr39/41 • Santa Fe- Lr3,Lr17 • TAM 112- Lr39/41 • Jagger - Lr17 • Armour - Lr39/41 • Overley - Lr39/41 • Blends

  9. Whither Rust Pathology?? Moderate – High Rust pressure $4-8 Wheat/bushel $10-20 Fungicide/acre Susceptible Wheat Average >10% yield increase >93% chance of economic return with fungicide application

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