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Citation for Study 591

About Citation title: "Phylogenetic relationships in the genus Hebeloma based on ITS 1 and 2 sequences, with special emphasis on the Hebeloma crustuliniforme complex.".
About This study was previously identified under the legacy study ID S419 (Status: Published).

Citation

Aanen D., Kuyper T., Boekhout T., & Hoekstra R. 2000. Phylogenetic relationships in the genus Hebeloma based on ITS 1 and 2 sequences, with special emphasis on the Hebeloma crustuliniforme complex. Mycologia, 92(2): 269-281.

Authors

  • Aanen D.
  • Kuyper T.
  • Boekhout T.
  • Hoekstra R.

Abstract

Phylogenetic relationships within the genus Hebeloma (Cortinariaceae, Agaricales) were determined, based on nuclear ribosomal ITS sequences, using cladistic methods. Special emphasis was on phylogenetic relationships within the H. crustuliniforme complex. In total 52 collections were analysed, representing 39 taxa. Agrocybe praecox and two species of Alnicola were used as outgroups. The genus Hebeloma appears to be monophyletic. Several well supported clades could be recognized. However, many of the basal relationships are unresolved or only weakly supported. Alternative topologies could not be rejected. It is therefore impossible to derive a revised infrageneric classification of Hebeloma. The H. crustuliniforme complex appears paraphyletic, consisting of two clades with three and 17 InterCompatibility Groups respectively. In the second clade many of the phylogenetic relationships are also unresolved, reflecting a high rate of recent speciation events. Most of the species in this clade form ectomycorrhizae with members of the Salicaceae. The taxon that is basal to this clade, however, is not associated with these hosts. The host tree switch to Salicaceae has been followed by extensive and rapid speciation.

Keywords

Agaricales; ectomycorrhiza; evolution; host specificity; phylogeny; sexual intercompatibility

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  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S591
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