bioRxiv preprint doi: https://doi.org/10.1101/2021.04.30.442184; this version posted May 1, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 Transcriptomics reveals the mycoparasitic strategy of the mushroom Entoloma 2 abortivum on species of the mushroom Armillaria 3 4 Running title: Mycoparasitism of Entoloma abortivum 5 6 Rachel A. Koch1 and Joshua R. Herr1,2,# 7 8 1Department of Plant Pathology, University of NeBraska, Lincoln, NE 68503, USA; 9 2Center for Plant Science Innovation, University of NeBraska, Lincoln, NE 68588, USA; 10 #Correspondence: Joshua R. Herr (
[email protected]) 11 12 Abstract word count (including aBstract and importance): 363 13 Text word count: 4938 14 15 16 17 18 19 20 21 22 23 24 1 bioRxiv preprint doi: https://doi.org/10.1101/2021.04.30.442184; this version posted May 1, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 25 ABSTRACT 26 During mycoparasitism, a fungus—the host—is parasitized By another fungus—the 27 mycoparasite . The genetic underpinnings of these relationships have Been Best 28 characterized in Ascomycete fungi. However, within Basidiomycete fungi, there are rare 29 instances of mushroom-forming species parasitizing the reproductive structures, or 30 sporocarps, of other mushroom-forming species.