Sexual selection in mushroom-forming basidiomycetes.

Proceedings. Biological Sciences
B P S NieuwenhuisDuur K Aanen

Abstract

We expect that sexual selection may play an important role in the evolution of mushroom-forming basidiomycete fungi. Although these fungi do not have separate sexes, they do play female and male roles: the acceptance and the donation of a nucleus, respectively. The primary mycelium (monokaryon) of basidiomycete fungi, growing from a germinating sexual spore, is hermaphroditic, but it loses female function upon the acceptance of a second nucleus. The resulting dikaryon with two different nuclei in each cell retains a male potential as both nuclei can fertilize receptive mycelia. We tested the occurrence of sexual selection in the model species of mushroom-forming basidiomycetes, Schizophyllum commune, by pairing monokaryons with fully compatible dikaryons. In most pairings, we found a strong bias for one of the two nuclei although both were compatible with the monokaryon when paired alone. This shows that sexual selection can occur in mushroom-forming basidiomycetes. Since the winning nucleus of a dikaryon occasionally varied depending on the receiving monokaryon, we infer that sexual selection can operate through choosiness of the receiving individual (analogous to female choice). However, in other cases the same nucleus won, i...Continue Reading

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Citations

Apr 30, 2013·Fungal Biology·Bart P S NieuwenhuisDuur K Aanen
Nov 21, 2012·Journal of Evolutionary Biology·B P S Nieuwenhuis, D K Aanen
May 7, 2013·Fungal Genetics and Biology : FG & B·Bart P S NieuwenhuisDuur K Aanen
Sep 14, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Sabine VreeburgDuur K Aanen
Sep 14, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Madeleine BeekmanJonathan P Evans
Apr 22, 2015·Mycobiology·Sinil KimHyeon-Su Ro
May 18, 2020·Heredity·Elvira Hörandl, Franz Hadacek

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