Biology

Phylogeny of Calostoma, the gelatinous-stalked puffball, based on nuclear and mitochondrial ribosomal DNA sequences

Document Type

Article

Abstract

Nucleotide sequence of the nuclear small and large subunit and the mitochondrial small and large ribosomal genes of Calostoma were used to investigate evolutionary relationships with other Basidiomycetes. In separate analyses with each gene, Calostoma was placed within the Boletales and outside the clades containing most gilled mushrooms, puffballs, stalked puffballs, earthstars, stinkhorns and nonboletalean Gasteromycetes. This contradicted previous taxonomic hypotheses. Calostoma was most closely related to Gyroporus, Pisolithus, and Scleroderma based on maximum parsimony and maximum likelihood analysis of the mitochondrial large ribosomal gene database, which contained several representatives of most genera of the Boletales. In three of the four gene trees Calostoma shows an unusually high number of inferred nucleotide substitutions relative to other Boletales; this corresponds to its extreme morphological divergence.

Publication Title

Mycologia

Publication Date

2000

Volume

92

Issue

1

First Page

94

Last Page

104

ISSN

0027-5514

DOI

10.2307/3761453

Keywords

12S rDNA, 18s rDNA, 28s rDNA, Boletales, evolution, Gasteromycete, Gyroporus, Mitremyces, Pisolithus, Scleroderma

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