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 321550
Title Sex Slows Down the Accumulation of Deleterious Mutations in the Homothallic Fungus Aspergillus nidulans
Author(s) Bruggeman, I.M.; Debets, A.J.M.; Wijngaarden, P.J.; Visser, J.A.G.M. de; Hoekstra, R.F.
Source Genetics 164 (2003). - ISSN 0016-6731 - p. 479 - 485.
Department(s) Laboratory of Genetics
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) drosophila-melanogaster - offspring quality - selection - viability - abortion - fitness - mosaics - locus - gene
Abstract Coexistence of sexual and asexual reproduction within the same individual is an intriguing problem, especially when it concerns homothallic haplonts, like the fungus Aspergillus nidulans. In this fungus asexual and sexual offspring have largely identical genotypes. This genetic model organism is an ideal tool to measure possible fitness effects of sex (compared to asex) resulting from causes other than recombination. In this article we show that slightly deleterious mutations accumulate at a lower rate in the sexual pathway than in the asexual pathway. This secondary sex advantage may contribute to the persistence of sexual spores in this fungus. We propose that this advantage results from intra-organismal selection of the fittest gametes or zygotes, which is more stringent in the costly sexual pathway.
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