Mycorrhiza

, Volume 7, Issue 5, pp 243–248

Genetic diversity of the ectomycorrhizal fungus Pisolithus tinctorius based on RAPD-PCR analysis

Authors

  • D. T. Junghans
    • Universidade Federal de Viçosa, Departamento de Microbiologia/BIOAGRO, Viçosa, MG, 36571-000 - Brazil Fax: +55-31-899-2573; e-mail: ezfa@mail.ufv.br
  • E. A. Gomes
    • Universidade Federal de Viçosa, Departamento de Microbiologia/BIOAGRO, Viçosa, MG, 36571-000 - Brazil Fax: +55-31-899-2573; e-mail: ezfa@mail.ufv.br
  • W. V. Guimarães
    • Universidade Federal de Viçosa, Departamento de Microbiologia/BIOAGRO, Viçosa, MG, 36571-000 - Brazil Fax: +55-31-899-2573; e-mail: ezfa@mail.ufv.br
  • E. G. Barros
    • Universidade Federal de Viçosa, Departamento de Biologia Geral/BIOAGRO, Viçosa, MG, 36571-000 - Brazil
  • E. F. Araújo
    • Universidade Federal de Viçosa, Departamento de Microbiologia/BIOAGRO, Viçosa, MG, 36571-000 - Brazil Fax: +55-31-899-2573; e-mail: ezfa@mail.ufv.br
ORIGINAL PAPER

DOI: 10.1007/s005720050187

Cite this article as:
Junghans, D., Gomes, E., Guimarães, W. et al. Mycorrhiza (1998) 7: 243. doi:10.1007/s005720050187

Abstract

 Twenty Pisolithus tinctorius isolates from different geographic locations and different hosts were characterized by the random amplified polymorphic DNA technique. Thirteen arbitrary primers generated 87 DNA fragments, all of them polymorphic. These data were used to calculate genetic distances among the isolates. The pairwise genetic distances ranged from 1 to 100%, with an average of 58.7%. Cluster analysis based on the amplified fragments grouped the isolates according to their host and geographical origins. Group I contained isolates collected in Brazil and group II those collected in the Northern Hemisphere. In addition to the diversity seen at the molecular level, the isolates also showed host specificity. Greenhouse experiments demonstrated that isolates from the Northern Hemisphere colonized mainly Pinus whereas isolates from Brazil colonized only Eucalyptus. The molecular data suggest that the Pisolithus tinctorius isolates analyzed belong to two distinct groups. The data also suggest new guidelines for future investigations on the taxonomy and systematic of this important fungus species. Furthermore, these results support future experiments aimed at the selection and development of improved isolates of P. tinctorius.

Key words DNA polymorphismEctomycorrhizal fungiGenetic diversityPisolithus tinctoriusRAPD
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© Springer-Verlag Berlin Heidelberg 1998