European Journal of Plant Pathology

, Volume 141, Issue 1, pp 159–168 | Cite as

Sexual reproduction contributes to genotypic variation in the population of Puccinia graminis in Tajikistan

  • Anna Berlin
  • Mahbubjon Rahmatov
  • Hafiz Muminjanov
  • Jonathan Yuen


Stem rust, caused by Puccinia graminis, is a potential threat to wheat production in Central Asia. To investigate if sexual reproduction is important for the epidemiology of the disease, the population biology of the fungus was studied. Samples of P. graminis were collected from six wheat fields and from wild oats within two of the wheat fields during the growing season of 2010. The population structure of P. graminis was investigated by evaluating a total of 121 single uredinia collected from wheat and wild oats, using nine polymorphic simple sequence repeat (SSR) markers. The results presented in this study indicate that there is a selection process by the grass host, in particular wheat, that favours certain clones, which in turn affects the population structure of P. graminis in Tajikistan. The genotypic variation was large, both within and between the wheat fields and three populations were in linkage equilibrium, indicating that sexual reproduction within the P. graminis population takes place. This leads to the conclusion that the presence of Berberis spp. in Tajikistan has an important role in the population dynamics of P. graminis within the country, even if the fungus must reproduce primarily in a clonal manner during most of the year. Results also confirm that the two formae speciales, P. graminis f. sp. tritici and P. graminis f. sp. avenae, are genetically different even if they were collected in the same field.


Avena fatua Triticum aestivum microsatellites alternate host Berberis spp Puccinia graminis f. sp. tritici Puccinia graminis f. sp. avenae 



The authors wish to thank Bernt Pett for assistance with sample collection, Annika Djurle for valuable comment on the manuscript and the Swedish University for Agricultural Sciences (SLU) for funding this research.

Supplementary material

10658_2014_534_MOESM1_ESM.docx (97 kb)
Supplementary Table 1BLASTn identity based on the Internal transcribed spacer (ITS) region (DOCX 97 kb)
10658_2014_534_Fig3_ESM.gif (121 kb)
Supplementary Figure 1

Structure output for K=5. Samples denominated as P. graminis f. sp. tritici are represented by yellow, green, pink and blue, and samples denominated as P. graminis f. sp. avenae are represented in red. (GIF 120 kb)

10658_2014_534_MOESM2_ESM.eps (768 kb)
High Resolution Image(EPS 768 kb)
10658_2014_534_Fig4_ESM.gif (9 kb)
Supplementary Figure 2

Neighbor-joining tree based on the ITS sequences of the collected samples with 1,000 bootstrap replications (GIF 8 kb)

10658_2014_534_MOESM3_ESM.eps (325 kb)
High Resolution Image(EPS 324 kb)


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Copyright information

© Koninklijke Nederlandse Planteziektenkundige Vereniging 2014

Authors and Affiliations

  • Anna Berlin
    • 1
  • Mahbubjon Rahmatov
    • 2
    • 3
  • Hafiz Muminjanov
    • 2
  • Jonathan Yuen
    • 1
  1. 1.Department of Forest Mycology and Plant PathologySwedish University of Agricultural SciencesUppsalaSweden
  2. 2.Tajik Agrarian UniversityDushanbeTajikistan
  3. 3.Department of Plant BreedingSwedish University of Agricultural SciencesAlnarpSweden

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