Encyclopedia of Entomology

2008 Edition
| Editors: John L. Capinera


  • Michael Bidochka
Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-6359-6_4577

Metarhizium is a haploid, deuteromycetous, insect-pathogenic fungus and a common inhabitant of soil worldwide. At least two species are formally recognized, Metarhizium anisopliae and Metarhizium flavoviride. Of the two, M. anisopliae is by far more common and occurs over a wide range of insect species. However, based on ITS (internally transcribed spacer region of DNA encodings ribosomal RNA) sequence analysis, vegetative compatibility groups, and population genetics analysis, Metarhizium may be represented by a large number of species found worldwide. Thus, the taxonomy and systematics of this genus are not fully resolved. Population genetics analysis showed that in nature Metarhiziumreproduces clonally but also has the potential for recombination. Recombination may occur through a process called parasexuality, a form of mitotic recombination, where vegetatively compatible hyphae fuse and exchange nuclei to form a heterokaryon. The nuclei fuse to produce a diploid homokaryon, the...

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© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Michael Bidochka
    • 1
  1. 1.Trent UniversityPeterboroughCanada