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Puccinia triticina virulence phenotypes present in Uruguay phenotypes present in Uruguay during 2004-2010 Silvia Germán La Estanzuela 2011 North American.

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Presentation on theme: "Puccinia triticina virulence phenotypes present in Uruguay phenotypes present in Uruguay during 2004-2010 Silvia Germán La Estanzuela 2011 North American."— Presentation transcript:

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

2 Wheat leaf rust (Puccinia triticina)

3 Samples Trap nurseries Trap nurseries Experiments Experiments Crops Crops 1 – 2 single pustule isolates per sample 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 and Lr20 MDT MDTMCR-10 MFP-20 MFP-20TDD-10,20 METHODOLOGY

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. during 2004-2010.

8 % virulence % 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 +) APR genes Lr12 inefective Lr13 ineffective Lr22a effective Lr22b ineffective Lr35 effective Lr37 ineffective Lr34 50-60 M Lr46 70-80 MSS Virulence frequency to Lr genes. 2004-2010. Field effective Lr29 0 Lr32 40 MRMS Lr33 60 MRMS Lr36 0 Lr45 0 Lr47 0 Lr51 0

9 Foto grupo de trabajo RichardGarcía NoeliaPerez FernandoPereira Thank you Gracias

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