Heterokaryosis and parasexuality in Pyricularia oryzae Cavara. Academic Article

abstract

• Auxotrophs in three different races of Pyricularia oryzae were obtained following ultraviolet mutagenesis, and tested for complementarity on minimal medium. Prototrophic growth resulted between combinations of different auxotrophs of single strains, but not between strains. The growth did not result form crossfeeding, but required at least transitory heterokaryosis. Putative diploids, i.e., large prototrophic conidia, were readily isolated from the heterokaryons. In addition, conidia with nearly every possible combination of parental markers were found, showing that P. oryzae does indeed complete the parasexual cycle. The degree of genetic recombination found here may help to explain the extreme variability of this organism.

authors

• Genovesi, Anthony
• Magill, Clint

published proceedings

• Can J Microbiol

author list (cited authors)

• Genovesi, A. D., & Magill, C. W.

citation count

• 27

complete list of authors

• Genovesi, AD||Magill, CW

publication date

• April 1976

publisher

• Canadian Science Publishing  Publisher

published in

• Canadian Journal of Microbiology  Journal

keywords

• Cell Nucleus
• Diploidy
• Heterozygote
• Mitosporic Fungi
• Mutation
• Oryza
• Recombination, Genetic
• Spores, Fungal
• Temperature
• Ultraviolet Rays

PubMed Central ID

• 944080

Digital Object Identifier (DOI)

• 10.1139/m76-079

start page

• 531

end page

• 536

volume

• 22

issue

• 4

URL

• http://dx.doi.org/10.1139/m76-079