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Beringian origins and cryptic speciation events in the fly agaric (Amanita muscaria).
Mol Ecol. 2006 Jan; 15(1):225-39.ME

Abstract

Amanita muscaria sensu lato has a wide geographic distribution, occurring in Europe, Asia, Africa, Australia, New Zealand, and North, Central and South America. Previous phylogenetic work by others indicates three geographic clades (i.e. 'Eurasian', 'Eurasian-alpine' and 'North American' groups) within A. muscaria. However, the historical dispersal patterns of A. muscaria remained unclear. In our project, we collected specimens from arctic, boreal and humid temperate regions in Alaska, and generated DNA sequence data from the protein-coding beta-tubulin gene and the internal transcribed spacer (ITS) and large subunit (LSU) regions of the ribosomal DNA repeat. Homologous sequences from additional A. muscaria isolates were downloaded from GenBank. We conducted phylogenetic and nested clade analyses (NCA) to reveal the phylogeographic history of the species complex. Although phylogenetic analyses confirmed the existence of the three above-mentioned clades, representatives of all three groups were found to occur sympatrically in Alaska, suggesting that they represent cryptic phylogenetic species with partially overlapping geographic distributions rather than being allopatric populations. All phylogenetic species share at least two morphological varieties with other species, suggesting ancestral polymorphism in pileus and wart colour pre-dating their speciations. The ancestral population of A. muscaria likely evolved in the Siberian-Beringian region and underwent fragmentation as inferred from NCA and the coalescent analyses. The data suggest that these populations later evolved into species, expanded their range in North America and Eurasia. In addition to range expansions, populations of all three species remained in Beringia and adapted to the cooling climate.

Authors+Show Affiliations

Institute of Arctic Biology, 311 Irving I Building, 902 N. Koyukuk Drive, PO Box 757000, University of Alaska Fairbanks, Fairbanks, AK 99775, USA. jgeml@iab.alaska.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16367842

Citation

Geml, J, et al. "Beringian Origins and Cryptic Speciation Events in the Fly Agaric (Amanita Muscaria)." Molecular Ecology, vol. 15, no. 1, 2006, pp. 225-39.
Geml J, Laursen GA, O'neill K, et al. Beringian origins and cryptic speciation events in the fly agaric (Amanita muscaria). Mol Ecol. 2006;15(1):225-39.
Geml, J., Laursen, G. A., O'neill, K., Nusbaum, H. C., & Taylor, D. L. (2006). Beringian origins and cryptic speciation events in the fly agaric (Amanita muscaria). Molecular Ecology, 15(1), 225-39.
Geml J, et al. Beringian Origins and Cryptic Speciation Events in the Fly Agaric (Amanita Muscaria). Mol Ecol. 2006;15(1):225-39. PubMed PMID: 16367842.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Beringian origins and cryptic speciation events in the fly agaric (Amanita muscaria). AU - Geml,J, AU - Laursen,G A, AU - O'neill,K, AU - Nusbaum,H C, AU - Taylor,D L, PY - 2005/12/22/pubmed PY - 2006/9/14/medline PY - 2005/12/22/entrez SP - 225 EP - 39 JF - Molecular ecology JO - Mol. Ecol. VL - 15 IS - 1 N2 - Amanita muscaria sensu lato has a wide geographic distribution, occurring in Europe, Asia, Africa, Australia, New Zealand, and North, Central and South America. Previous phylogenetic work by others indicates three geographic clades (i.e. 'Eurasian', 'Eurasian-alpine' and 'North American' groups) within A. muscaria. However, the historical dispersal patterns of A. muscaria remained unclear. In our project, we collected specimens from arctic, boreal and humid temperate regions in Alaska, and generated DNA sequence data from the protein-coding beta-tubulin gene and the internal transcribed spacer (ITS) and large subunit (LSU) regions of the ribosomal DNA repeat. Homologous sequences from additional A. muscaria isolates were downloaded from GenBank. We conducted phylogenetic and nested clade analyses (NCA) to reveal the phylogeographic history of the species complex. Although phylogenetic analyses confirmed the existence of the three above-mentioned clades, representatives of all three groups were found to occur sympatrically in Alaska, suggesting that they represent cryptic phylogenetic species with partially overlapping geographic distributions rather than being allopatric populations. All phylogenetic species share at least two morphological varieties with other species, suggesting ancestral polymorphism in pileus and wart colour pre-dating their speciations. The ancestral population of A. muscaria likely evolved in the Siberian-Beringian region and underwent fragmentation as inferred from NCA and the coalescent analyses. The data suggest that these populations later evolved into species, expanded their range in North America and Eurasia. In addition to range expansions, populations of all three species remained in Beringia and adapted to the cooling climate. SN - 0962-1083 UR - https://www.unboundmedicine.com/medline/citation/16367842/Beringian_origins_and_cryptic_speciation_events_in_the_fly_agaric__Amanita_muscaria__ L2 - https://doi.org/10.1111/j.1365-294X.2005.02799.x DB - PRIME DP - Unbound Medicine ER -