PMID: 9435064Jan 22, 1998Paper

Molecular analysis of hypervirulent somatic hybrids of the entomopathogenic fungi Beauveria bassiana and Beauveria sulfurescens

Applied and Environmental Microbiology
M ViaudG Riba

Abstract

Protoplast fusion of diauxotrophic mutants of a Beauveria bassiana entomopathogenic strain (Bb28) and a Beauveria sulfurescens toxinogenic strain (Bs2) produced hybrids which were significantly different from the parents in pathogenicity. Some of the hybrids were hypervirulent and killed insects more quickly than the Bb28 strain, probably because these hybrids had acquired the toxic activity of the Bs2 strain. By using six nuclear genes and a telomeric fingerprint probe, the molecular structures of the hybrids were studied. The results demonstrated the occurrence of parasexual events. Hybrids appeared to be diploid or aneuploid, with portions of the genome being heterozygous. A mitochondrial molecular marker indicated homoplasmy of the hybrids and inheritance of mitochondria from strain Bs2 or Bb28. The pathogenicities and the ploidies of the hybrids remained stable after passage through the host insect, showing that somatic hybridization provides an attractive method for the genetic improvement of biocontrol efficiency in the genus Beauveria.

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Citations

Apr 23, 2008·Infection and Immunity·Xiaorong LinJoseph Heitman
Dec 17, 2002·The Journal of General and Applied Microbiology·Siu Wai ChiuMing Jie Chen
Jun 27, 2018·Scientific Reports·S E GreenspanC G Becker
Jun 3, 2005·Molecular Genetics and Genomics : MGG·Peter W InglisM Cléria Valadares-Inglis
Aug 2, 2005·FEMS Microbiology Letters·Eiji YokoyamaAkira Hara
Sep 27, 2003·Environmental Microbiology·Chengshu WangTariq M Butt
Dec 17, 2014·Applied Microbiology and Biotechnology·Almudena Ortiz-UrquizaNemat O Keyhani

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