Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 May;32(10):2519-2533.
doi: 10.1111/mec.16927. Epub 2023 Apr 2.

Evolution of the rice blast pathogen on spatially structured rice landraces maintains multiple generalist fungal lineages

Sajid Ali  1   2 , Pierre Gladieux  1 , Sebastien Ravel  1   3 , Henri Adreit  1   3 , Isabelle Meusnier  1 , Joelle Milazzo  1   3 , Sandrine Cros-Arteil  1 , François Bonnot  1   3 , Baihui Jin  4 , Thomas Dumartinet  1 , Florian Charriat  1 , Alexandre Lassagne  3 , Xiahong He  5 , Didier Tharreau  1   3 , Huichuan Huang  6   7 , Jean-Benoît Morel  1 , Elisabeth Fournier  1
Affiliations

Evolution of the rice blast pathogen on spatially structured rice landraces maintains multiple generalist fungal lineages

Sajid Ali et al. Mol Ecol. 2023 May.

Abstract

Traditional agrosystems, where humans, crops and microbes have coevolved over long periods, can serve as models to understand the ecoevolutionary determinants of disease dynamics and help the engineering of durably resistant agrosystems. Here, we investigated the genetic and phenotypic relationship between rice (Oryza sativa) landraces and their rice blast pathogen (Pyricularia oryzae) in the traditional Yuanyang terraces of flooded rice paddies in China, where rice landraces have been grown and bred over centuries without significant disease outbreaks. Analyses of genetic subdivision revealed that indica rice plants clustered according to landrace names. Three new diverse lineages of rice blast specific to the Yuanyang terraces coexisted with lineages previously detected at the worldwide scale. Population subdivision in the pathogen population did not mirror pattern of population subdivision in the host. Measuring the pathogenicity of rice blast isolates on landraces revealed generalist life history traits. Our results suggest that the implementation of disease control strategies based on the emergence or maintenance of a generalist lifestyle in pathogens may sustainably reduce the burden of disease in crops.

Keywords: Oryza sativa; Pyricularia oryzae; intraspecific cultivated diversity; landraces; phenotype-genotype associations; population genomics; rice blast; traditional farming.

PubMed Disclaimer

References

REFERENCES

    1. Adreit, H., Andriantsimialona, D., Utami, D. W., Nottéghem, J.-L., Lebrun, M.-H., & Tharreau, D. (2007). Microsatellite markers for population studies of the rice blast fungus, Magnaporthe grisea. Molecular Ecology Notes, 7, 667-670. https://doi.org/10.1111/j.1471-8286.2006.01672.x
    1. Ali, S., Gladieux, P., Leconte, M., Gautier, A., Justesen, A. F., Hovmøller, M. S., Enjalbert, J., & de Vallavieille-Pope, C. (2014). Origin, migration routes and worldwide population genetic structure of the wheat yellow rust pathogen Puccinia striiformis f.sp. tritici. PLoS Pathogens, 10, e1003903. https://doi.org/10.1371/journal.ppat.1003903
    1. Arbelaez, J. D., Moreno, L. T., Singh, N., Tung, C. W., Maron, L., Ospina, Y., Martinez, C. P., Grenier, C., Lorieux, M., & McCouch, S. (2015). Development and GBS genotyping of introgression lines (ILs) using two wild species of rice, O. meridionalis and O. rufipogon, in a common recurrent parent, O. sativa cv. Curinga. Molecular Breeding, 35, 81. https://doi.org/10.1007/s11032-015-0276-7
    1. Blanquart, F., Klatz, O., Nuismer, S. L., & Gandon, S. (2013). A practical guide to measuring local adaptation. Ecology Letters, 16, 1195-1205. https://doi.org/10.1111/ele.12150
    1. Brown, J. K. M. (1994). Chance and selection in the evolution of barley mildew. Trends in Microbiology, 2, 470-475.

Publication types

LinkOut - more resources