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Miocene and Pliocene speciation of Russula subsection Roseinae in temperate forests of eastern North America

View ORCID ProfileBrian P. Looney, Slavomír Adamčík, P. Brandon Matheny
doi: https://doi.org/10.1101/770289
Brian P. Looney
aUniversity of Tennessee, Department of Ecology and Evolutionary Biology, Knoxville, TN, 37996, USA
1Duke University, Department of Biology, Durham, NC, 27708, USA
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  • ORCID record for Brian P. Looney
  • For correspondence: brian.looney@duke.edu
Slavomír Adamčík
bPlant Science and Biodiversity Centre, Slovak Academy of Sciences, 84523 Bratislava, Slovakia
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P. Brandon Matheny
aUniversity of Tennessee, Department of Ecology and Evolutionary Biology, Knoxville, TN, 37996, USA
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Abstract

Numerous lineages of mushroom-forming fungi have been subject to bursts of diversification throughout their evolutionary history, events that can impact our ability to infer well-resolved phylogenies. However, groups that have undergone quick genetic change may have the highest adaptive potential. As the second largest genus of mushroom-forming fungi, Russula provides an excellent model for studying hyper-diversification and processes in evolution that drives it. This study focuses on the morphologically defined group – Russula subsection Roseinae. Species hypotheses based on morphological differentiation and multi-locus phylogenetic analyses are tested in the Roseinae using different applications of the multi-species coalescent model. Based on this combined approach, we recognize fourteen species in Roseinae including the Albida and wholly novel Magnarosea clades. Reconstruction of biogeographic and host association history suggest that parapatric speciation in refugia during glacial cycles of the Pleistocene drove diversification within the Roseinae, which is found to have a Laurasian distribution with an evolutionary origin in the Appalachian Mountains of eastern North America. Finally, we detect jump dispersal at a continental scale that has driven diversification since the most recent glacial cycles.

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  • Declarations of interest: none

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted September 16, 2019.
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Miocene and Pliocene speciation of Russula subsection Roseinae in temperate forests of eastern North America
Brian P. Looney, Slavomír Adamčík, P. Brandon Matheny
bioRxiv 770289; doi: https://doi.org/10.1101/770289
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Miocene and Pliocene speciation of Russula subsection Roseinae in temperate forests of eastern North America
Brian P. Looney, Slavomír Adamčík, P. Brandon Matheny
bioRxiv 770289; doi: https://doi.org/10.1101/770289

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