Plant Pathology Department

 

Document Type

Article

Date of this Version

2000

Citation

Mycologia 92:1 (2000), pp. 94–104.

doi: 10.1080/00275514.2000.12061133

Comments

Copyright © 2000 The Mycological Society of America. Published by Taylor & Francis. Used by permission.

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.

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