Non-detection of mycoviruses in amphibian chytrid fungus (Batrachochytrium dendrobatidis) from Australia

Webb, Rebecca J., Roberts, Alexandra A., Wylie, Stephen, Kosch, Tiffany, Toledo, Luís Felipe, Merces, Marcia, Skerratt, Lee F., and Berger, Lee (2022) Non-detection of mycoviruses in amphibian chytrid fungus (Batrachochytrium dendrobatidis) from Australia. Fungal Biology, 126 (1). pp. 75-81.

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Mycoviruses may influence the pathogenicity of disease-causing fungi. Although mycoviruses have been found in some chytrid fungi, limited testing has not detected them in Batrachochytrium dendrobatidis (Bd), the cause of the devastating amphibian disease, chytridiomycosis. Here we conducted a survey for mycovirus presence in 38 Bd isolates from Australia (n = 31), Brazil (n = 5) and South Korea (n = 2) with a combination of modern high-throughput sequencing and conventional dsRNA cellulose chromatography. Mycoviruses were not detected in any isolates. This result was unexpected, given the long evolutionary history of Bd, as well as the high prevalence of mycoviruses in related fungal species. Given our widespread sampling in Australia and the limited number of Bd introductions, we suggest that mycoviruses are uncommon or absent from Australian Bd. Testing more isolates from regions where Bd originated, as well as regions with high diversity or low fungal virulence may identify mycoviruses that could aid in disease control.

Item ID: 74811
Item Type: Article (Research - C1)
ISSN: 1878-6162
Keywords: Amphibia, Batrachochytrium dendrobatidis, Biocontrol, Chytrid, Mycovirus, Wildlife diseases
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Copyright Information: © 2021 British Mycological Society. Published by Elsevier Ltd. All rights reserved.
Funders: Australian Research Council (ARC)
Projects and Grants: ARC FT190100462
Date Deposited: 12 Dec 2022 04:16
FoR Codes: 31 BIOLOGICAL SCIENCES > 3107 Microbiology > 310705 Mycology @ 80%
31 BIOLOGICAL SCIENCES > 3107 Microbiology > 310706 Virology @ 20%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1806 Terrestrial systems and management > 180606 Terrestrial biodiversity @ 100%
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