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Puccinia triticina virulence phenotypes present in Uruguay during 2004-2010

Puccinia triticina virulence phenotypes present in Uruguay during 2004-2010. 2011 North American Rust Workers Meeting St. Paul, Minnesta, USA June 12, 2011. Silvia Germán. La Estanzuela. Wheat leaf rust ( Puccinia triticina ). METHODOLOGY. Samples Trap nurseries Experiments

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Puccinia triticina virulence phenotypes present in Uruguay during 2004-2010

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  1. Puccinia triticina virulence phenotypes present in Uruguay during 2004-2010 2011 North American Rust Workers Meeting St. Paul, Minnesta, USA June 12, 2011 Silvia Germán La Estanzuela

  2. Wheat leaf rust (Puccinia triticina)

  3. METHODOLOGY • Samples • Trap nurseries • Experiments • Crops • 1 – 2 single pustule isolates per sample Differential set Lr 1 2a 2c 3 Lr 9 16 24 26 Lr 3ka 11 17 30 Lr 10 20 ..... Nomenclature Long and Kolmer, 1989 3 letter Prt code + Virulence to Lr10 andLr20 MDT MCR-10 MFP-20 TDD-10,20

  4. Number of P. triticina isolates studied, tolal numer of races and races present with more than 5 and 10% frequency in Uruguay. 2004-2010.

  5. Avirulence/virulence formulae of more frequent races, and year of first detection

  6. Frequency of important Puccinia triticina isolates and affected cultivares Uruguay. 2004-2010.

  7. Virulence formulae and year of first detection of other Puccinia triticina races present in Uruguay during 2004-2010.

  8. Virulence frequency to Lr genes. 2004-2010. % virulence Lr3bg high (2006 +) Lr14a 100 Lr14b high Lr21 0 Lr23 int-high Lr25 0 (2006 +, mixture) Lr39/41 2009 need confirm Lr42 2009 need confirm Lr47 0 (2009 +) Field effective Lr29 0 Lr32 40 MRMS Lr33 60 MRMS Lr36 0 Lr45 0 Lr47 0 Lr51 0 APR genes Lr12inefective Lr13ineffective Lr22aeffective Lr22b ineffective Lr35 effective Lr37ineffective Lr34 50-60 M Lr46 70-80 MSS

  9. Foto grupo de trabajo Fernando Pereira Richard García Noelia Perez Thank you Gracias

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