Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 321168
Title Male and female roles in crosses of Aspergillus nidulans as revealed by vegetatively incompatible parents
Author(s) Bruggeman, I.M.; Debets, A.J.M.; Swart, K.; Hoekstra, R.F.
Source Fungal Genetics and Biology 39 (2003). - ISSN 1087-1845 - p. 136 - 141.
Department(s) Laboratory of Genetics
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) heterokaryon incompatibility - neurospora-crassa - inheritance - evolution - mutants - meiosis - genome - nuclei
Abstract To resolve the role of male and female nuclei and mitochondria in cleistothecium formation in the model organism Aspergillus nidulans, we analysed the genetic constituents of cleistothecia, from crosses between vegetatively compatible and incompatible parents. We used markers that enabled us to determine the nuclear genotype of the cleistothecial wall and the nuclear and mitochondrial genotype of the ascospores. In compatible parents, nuclear genomes and cytoplasm usually mix in the vegetative hyphae prior to the formation of the sexual stage after which any cleistothecial composition is possible. In incompatible parents, the maternal strain contributes the nuclei for the cleistothecial wall and one nucleus as well as mitochondria for the ascospore origin. The paternal strain donates one nucleus for the ascospore origin. Only in crosses between vegetatively incompatible partners, it is possible to assign a female and male role to the parental strains. Our results confirm that the vegetative heterokaryotic stage is not a prerequisite for cleistothecium formation. Using this tool, we analysed sexual sporulation mutants for male or female sterility. (C) 2003 Elsevier Science (USA). All rights reserved.
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