Summary
Fruiting in the basidiomycete Schizophyllum commune readily occurs in a homokaryon with constitutive mutations in both the A and B mating-type genes. Such a homokaryon frequently expresses a mutation, fbf, which completely blocks fruiting and leads to a somewhat faster growth rate. The mutation is unlinked to the A and B genes, frequently reverts to its wild-type allele, and is recessive with respect to fruiting in matings with wild-type homokaryons. The mutation suppresses the accumulation of a number of mRNAs which are regulated by the mating-types genes and are specific for fruiting. The expression of the Sc-3 gene, structurally related to two of the fruiting genes (Sc-1 and Sc-4) but not regulated by the mating-type genes, is unaffected.
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References
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Communicated by C.A.M.J.J. van den Hondel
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Springer, J., Wessels, J.G.H. A frequently occurring mutation that blocks the expression of fruiting genes in Schizophyllum commune . Mol Gen Genet 219, 486–488 (1989). https://doi.org/10.1007/BF00259624
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DOI: https://doi.org/10.1007/BF00259624