Global Sexual Fertility in the Opportunistic Pathogen Aspergillus fumigatus and Identification of New Supermater Strains
| Autor: | Joanne Del Buono, Matthias Brock, Janyce A. Sugui, Wenyue Du, Paul S. Dyer, Kyung J. Kwon-Chung, Céline M. O’Gorman, Sameira S. Swilaiman, George Szakacs |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Microbiology (medical)
Mating type Population Plant Science Article Aspergillus fumigatus Gene flow 03 medical and health sciences Genetic variation Mating education lcsh:QH301-705.5 Ecology Evolution Behavior and Systematics 030304 developmental biology Genetics sexual fertility 0303 health sciences education.field_of_study biology 030306 microbiology cleistothecia biology.organism_classification Sexual reproduction lcsh:Biology (General) supermater Ascospore |
| Zdroj: | Journal of Fungi, Vol 6, Iss 258, p 258 (2020) Journal of Fungi Volume 6 Issue 4 |
| Popis: | A sexual cycle in Aspergillus fumigatus was first described in 2009 with isolates from Dublin, Ireland. However, the extent to which worldwide isolates can undergo sexual reproduction has remained unclear. In this study a global collection of 131 isolates was established with a near 1:1 ratio of mating types. All isolates were crossed to MAT1-1 or MAT1-2 Irish strains, and a subset of isolates from different continents were crossed together. Ninety seven percent of isolates were found to produce cleistothecia with at least one mating partner, showing that sexual fertility is not limited to the Irish population but is a characteristic of global A. fumigatus. However, large variation was seen in numbers of cleistothecia produced per cross, suggesting differences in the possibility for genetic exchange between strains in nature. The majority of crosses produced ascospores with > 50% germination rates, but with wide variation evident. A high temperature heat shock was required to induce ascospore germination. Finally, a new set of highly fertile MAT1-1 and MAT1-2 supermater strains were identified and pyrimidine auxotrophs generated for community use. Results provide insights into the potential for the A. fumigatus sexual cycle to generate genetic variation and allow gene flow of medically important traits. |
| Databáze: | OpenAIRE |
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