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Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation

Author

Listed:
  • Feng Li

    (University of Minnesota)

  • Narayana M. Upadhyaya

    (Agriculture and Food)

  • Jana Sperschneider

    (The Australian National University)

  • Oadi Matny

    (University of Minnesota)

  • Hoa Nguyen-Phuc

    (University of Minnesota)

  • Rohit Mago

    (Agriculture and Food)

  • Castle Raley

    (Leidos Biomedical Research
    The George Washington University)

  • Marisa E. Miller

    (University of Minnesota
    Pairwise)

  • Kevin A. T. Silverstein

    (Minnesota Supercomputing Institute)

  • Eva Henningsen

    (University of Minnesota)

  • Cory D. Hirsch

    (University of Minnesota)

  • Botma Visser

    (University of the Free State)

  • Zacharias A. Pretorius

    (University of the Free State)

  • Brian J. Steffenson

    (University of Minnesota)

  • Benjamin Schwessinger

    (The Australian National University)

  • Peter N. Dodds

    (Agriculture and Food)

  • Melania Figueroa

    (Agriculture and Food)

Abstract

Parasexuality contributes to diversity and adaptive evolution of haploid (monokaryotic) fungi. However, non-sexual genetic exchange mechanisms are not defined in dikaryotic fungi (containing two distinct haploid nuclei). Newly emerged strains of the wheat stem rust pathogen, Puccinia graminis f. sp. tritici (Pgt), such as Ug99, are a major threat to global food security. Here, we provide genomics-based evidence supporting that Ug99 arose by somatic hybridisation and nuclear exchange between dikaryons. Fully haplotype-resolved genome assembly and DNA proximity analysis reveal that Ug99 shares one haploid nucleus genotype with a much older African lineage of Pgt, with no recombination or chromosome reassortment. These findings indicate that nuclear exchange between dikaryotes can generate genetic diversity and facilitate the emergence of new lineages in asexual fungal populations.

Suggested Citation

  • Feng Li & Narayana M. Upadhyaya & Jana Sperschneider & Oadi Matny & Hoa Nguyen-Phuc & Rohit Mago & Castle Raley & Marisa E. Miller & Kevin A. T. Silverstein & Eva Henningsen & Cory D. Hirsch & Botma V, 2019. "Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation," Nature Communications, Nature, vol. 10(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12927-7
    DOI: 10.1038/s41467-019-12927-7
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    Cited by:

    1. Yogesh K. Gupta & Francismar C. Marcelino-Guimarães & Cécile Lorrain & Andrew Farmer & Sajeet Haridas & Everton Geraldo Capote Ferreira & Valéria S. Lopes-Caitar & Liliane Santana Oliveira & Emmanuell, 2023. "Major proliferation of transposable elements shaped the genome of the soybean rust pathogen Phakopsora pachyrhizi," Nature Communications, Nature, vol. 14(1), pages 1-16, December.
    2. Yuanwen Guo & Bliss Betzen & Andres Salcedo & Fei He & Robert L. Bowden & John P. Fellers & Katherine W. Jordan & Alina Akhunova & Mathew N. Rouse & Les J. Szabo & Eduard Akhunov, 2022. "Population genomics of Puccinia graminis f.sp. tritici highlights the role of admixture in the origin of virulent wheat rust races," Nature Communications, Nature, vol. 13(1), pages 1-16, December.

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