Means, motive and opportunity for biological invasions: Genetic introgression in a fungal pathogen

Rogério, Flávia, van Oosterhout, Cock ORCID:, Ciampi-Guillardi, Maisa, Correr, Fernando Henrique, Hosaka, Guilherme Kenichi, Cros-Arteil, Sandrine, Rodrigues Alves Margarido, Gabriel, Massola Júnior, Nelson S. and Gladieux, Pierre (2023) Means, motive and opportunity for biological invasions: Genetic introgression in a fungal pathogen. Molecular Ecology, 32 (10). pp. 2428-2442. ISSN 0962-1083

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Invasions by fungal plant pathogens pose a significant threat to the health of agricultural ecosystems. Despite limited standing genetic variation, many invasive fungal species can adapt and spread rapidly, resulting in significant losses to crop yields. Here, we report on the population genomics of Colletotrichum truncatum, a polyphagous pathogen that can infect more than 460 plant species, and an invasive pathogen of soybean in Brazil. We study the whole-genome sequences of 18 isolates representing 10 fields from two major regions of soybean production. We show that Brazilian C. truncatum is subdivided into three phylogenetically distinct lineages that exchange genetic variation through hybridization. Introgression affects 2%–30% of the nucleotides of genomes and varies widely between the lineages. We find that introgressed regions comprise secreted protein-encoding genes, suggesting possible co-evolutionary targets for selection in those regions. We highlight the inherent vulnerability of genetically uniform crops in the agro-ecological environment, particularly when faced with pathogens that can take full advantage of the opportunities offered by an increasingly globalized world. Finally, we discuss “the means, motive and opportunity” of fungal pathogens and how they can become invasive species of crops. We call for more population genomic studies because such analyses can help identify geographical areas and pathogens that pose a risk, thereby helping to inform control strategies to better protect crops in the future.

Item Type: Article
Additional Information: Special Issue: EVOLUTIONARY ECOLOGY OF HUMAN‐ASSOCIATED MICROBES Funding Information: The authors are grateful for the financial support given by São Paulo Research Foundation (FAPESP, Grant/Award No.: 2017/09178‐8), National Science and Technology Development Council (CNPq, Grant/Award No.: 153958/2016‐2), and National Council for the Improvement of Higher Education (CAPES/PDSE, Grant/Award No.: 88881.133223/2016‐01, PROEX/CAPES, Grant/Award No.: 330002037002P3).
Uncontrolled Keywords: colletotrichum truncatum,anthracnose,bridgehead,population genomics,recombination,soybean,ecology, evolution, behavior and systematics,genetics ,/dk/atira/pure/subjectarea/asjc/1100/1105
Faculty \ School: Faculty of Science > School of Environmental Sciences
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Depositing User: LivePure Connector
Date Deposited: 22 Feb 2022 11:30
Last Modified: 09 May 2023 14:30
DOI: 10.1111/mec.16366


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