Mycobiology

The Korean Society of Mycology (한국균학회)
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Widespread Occurrence of a CYP51A Pseudogene in Calonectria pseudonaviculata

  • Stravoravdis, Stefanos (Biology Department, Eastern Connecticut State University) ;
  • LeBlanc, Nicholas R. (Mycology and Nematology Genetic Diversity and Biology Laboratory, United States Department of Agriculture, Agricultural Research Service) ;
  • Marra, Robert E. (Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station) ;
  • Crouch, Jo Anne (Mycology and Nematology Genetic Diversity and Biology Laboratory, United States Department of Agriculture, Agricultural Research Service) ;
  • Hulvey, Jonathan P. (Biology Department, Eastern Connecticut State University)
  • Received : 2019.08.08
  • Accepted : 2019.10.14
  • Published : 2020.02.29
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Abstract

Calonectria pseudonaviculata and C. henricotiae are two closely related fungal species responsible for boxwood blight disease of ornamental shrubs (Buxus spp.) in the U.S. and Europe. A previous study has shown isolates of the latter species, which is restricted to Europe, to be less sensitive to tetraconazole, an azole fungicide. In this study, we have analyzed the CYP51 paralogs for polymorphism in 26 genomes, representing geographically disparate populations of C. pseudonaviculata (n = 19) and C. henricotiae (n = 7), from the U.S., Europe, Asia, and New Zealand. The presence of a CYP51A pseudogene and lack of a functional CYP51A paralog in all C. pseudonaviculata genomes examined is a novel discovery for fungi and could have implications for the evolution of resistance to antifungal chemicals.

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References

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