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High population diversity and increasing importance of the Eucalyptus stem canker pathogen, Teratosphaeria zuluensis, in South China

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Abstract

Coniothyrium stem canker, caused by Teratosphaeria zuluensis, is one of the most important diseases of plantation-grown Eucalyptus trees in tropical and sub-tropical areas of the world. Previous research on the population structure of T. zuluensis in China, Malawi and South Africa has suggested that T. zuluensis in these countries had independent origins, with the highest genetic diversity found in a population from South China. In this study, the genetic diversity of three T. zuluensis populations from different regions in South China was determined using ten microsatellite markers. Results showed that more than one genotype of T. zuluensis can occur on a single tree in all three populations and that a moderate to high genetic diversity exists within the populations. Population differentiation was evident between populations, and in one population there was evidence for a low level of genetic recombination. Comparisons among the three populations of T. zuluensis from South China suggest that they originated independently of each other.

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Acknowledgements

This study was initiated through a bilateral agreement between South Africa and China, and funded through projects 30771732, 2007DFA31190 and 2008B050100014. We also appreciate the financial and logistical support of the members of Tree Protection Co-operative Programme (TPCP). We are grateful to Mr Albe Van Der Merwe for advice and discussion, and Chinese colleagues at the XiJiang Forestry Bureau, JinGui Nursery and DongMen Forestry Farm, XinTao Mou and GuiXiang Zhao for their valuable assistance in the field.

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Authors and Affiliations

  1. Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002, South Africa

    Shuai Fei Chen, Donald Chungu, Jolanda Roux, Michael J. Wingfield & Xu Dong Zhou

  2. Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002, South Africa

    Irene Barnes

  3. China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), ZhanJiang, 524022, GuangDong Province, China

    Shuai Fei Chen, Yao Jian Xie & Xu Dong Zhou

Authors
  1. Shuai Fei Chen
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  2. Irene Barnes
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  3. Donald Chungu
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  4. Jolanda Roux
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  5. Michael J. Wingfield
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  6. Yao Jian Xie
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  7. Xu Dong Zhou
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Correspondence to Xu Dong Zhou.

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Chen, S.F., Barnes, I., Chungu, D. et al. High population diversity and increasing importance of the Eucalyptus stem canker pathogen, Teratosphaeria zuluensis, in South China. Australasian Plant Pathol. 40, 407–415 (2011). https://doi.org/10.1007/s13313-011-0051-0

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