Australasian Plant Pathology

, Volume 40, Issue 5, pp 497–503 | Cite as

Unexpected genetic diversity revealed in the Eucalyptus canker pathogen Teratosphaeria gauchensis

  • M. N. Cortinas
  • I. Barnes
  • B. D. WingfieldEmail author
  • M. J. Wingfield


Teratosphaeria gauchensis causes a serious canker disease on Eucalyptus spp. in plantations in South America and Africa. The pathogen is closely related to, but distinct from T. zuluensis that causes a similar stem canker disease on Eucalyptus. The objective of this study was to use 10 previously developed polymorphic microsatellite markers to study the population diversity of T. gauchensis, based on collections of the fungus made in Argentina and Uruguay. The alleles were size-analyzed to determine population genetic parameters of the T. gauchensis populations. The results showed that isolates from the two collection sites represent the same population. Overall, the genetic diversity amongst isolates was higher than expected and inconsistent with the notion that the pathogen represents a recent introduction into South America.


Ascomycete Eucalyptus stem canker Forest pathogen Teratosphaeria gauchensis Teratosphaeria zuluensis Microsatellites Population structure Population genetics 



We are grateful for the assistance from forestry companies in Uruguay and Argentina and express our gratitude to Sophie Arnaud-Haond for her comments and help using GENCLONE 2.O. We also acknowledge the National Research Foundation (NRF), members of the Tree Protection Co-operative Program (TPCP), the THRIP initiative of the Department of Trade and Industry and the DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), University of Pretoria, South Africa for financial support.


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Copyright information

© Australasian Plant Pathology Society Inc. 2011

Authors and Affiliations

  • M. N. Cortinas
    • 1
  • I. Barnes
    • 1
  • B. D. Wingfield
    • 1
    Email author
  • M. J. Wingfield
    • 1
  1. 1.Department of GeneticsForestry and Agriculture Biotechnology Institute (FABI)PretoriaSouth Africa

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