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Population genetics of the wheat leaf rust fungus, Puccinia triticina in Central Asia

Population genetics of the wheat leaf rust fungus, Puccinia triticina in Central Asia. J. A. Kolmer M. E. Ordonez USDA-ARS Cereal Disease Laboratory University of Minnesota -St. Paul. Leaf Rust Collections. Collections from 2002, 2004, 2005 A. Morgounov - CIMMYT, Almaty Kazakhstan

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Population genetics of the wheat leaf rust fungus, Puccinia triticina in Central Asia

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  1. Population genetics of the wheat leaf rust fungus, Puccinia triticinain Central Asia J. A. Kolmer M. E. Ordonez USDA-ARS Cereal Disease Laboratory University of Minnesota -St. Paul

  2. Leaf Rust Collections • Collections from 2002, 2004, 2005 • A. Morgounov - CIMMYT, Almaty Kazakhstan • 137 isolates tested for virulence - 99 for SSR • Caucasus - (Azb.,Geo. Arm.) 13 Uzbekistan - 7 Tajikistan-Kyrgyzstan -15 S. Kazakhstan - 39 N. Kazakhstan- 25 N. America-16 Durum - 2 Clone corrected within populations (race/SSR genotype) 20 differentials - 23 SSR loci Super highway - Kazakhstan

  3. Virulence and SSR Diversity

  4. Tjk-Kyg-Uzb.-Caucasus not sig. differentiated S. Kaz - N. Kaz.not sig. differentiated Differentiation Statistics (Phi) of Pair-wise Populations - Virulence phenotypes Neighbor joining

  5. Differentiation (Fst) Statistics of Pair-wise Populations SSR Genotypes Tjk-Kyg-Uzb - Caucasus not signif. differentiated S. Kaz - N. Kaz. not signif. differentiated 0.82 correlation with virulence tree Neighbor joining

  6. Individual Isolates SSR Allele Variation -Central Asia 1 Avir Lr2a Vir Lr2c 2 4 Most from Cauc-Tjk-Kry-Uzb. 3 Vir Lr2a Vir Lr2c Most from S.+ N.Kazakhstan -North America Avir Lr2a Vir Lr2c Vir Lr2a Lr2c Avir Lr2a Lr2c -Durum 6 Avir. to almost all Lr genes Neighbor joining

  7. Central AsiaP. triticina populations Come to Kazakhstan!!! • Two distinct regional populations - mountain barrier • Limited migration between regions - very few SSR-virulence genotypes in common • Strong relationship between virulence and SSR genotypes

  8. Population Genetics of P. triticina - Future Goals • Describe world-wide populations 20 Tc line differentials 23 SSR loci • North America, Central Asia, Middle East, South America, Europe • Determine genetic relationships between populations - (MCDS - USA- S. America)

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