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Fitness of three chemotypes of Fusarium graminearum species complex in major winter wheat-producing areas of China

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  • Yang-yang Liu
  • Han-yan Sun
  • Wei Li
  • Yun-lei Xia
  • Yuan-yu Deng
  • Ai-xiang Zhang
  • Huai-gu Chen

Abstract

In China, Fusarium head blight is caused mainly by the Fusarium graminearum species complex (FGSC), which produces trichothecene toxins. The FGSC is divided into three chemotypes: 3-acetyldeoxynivalenol (3-ADON), 15-acetyldeoxynivalenol (15-ADON), and nivalenol (NIV). In order to predict the geographical changes in the distribution of these chemotype populations in major winter wheat-producing areas in China, the biological characteristics of twenty randomly selected isolates from each of the three chemotypes were studied. No significant difference was exhibited in the growth rate of 3-ADON, 15-ADON, and NIV isolates at 15°C. At 20°C and 25°C, the growth rate of 15-ADON isolates was the highest. At 30°C, the growth rate of NIV and 3-ADON isolates was significantly higher than that of 15-ADON isolates. The 15-ADON isolates produced the highest quantities of perithecia and two to three days earlier than the other two populations at each temperature, and released more ascospores at 18°C. The aggressiveness test on wheat seedlings and ears indicated there was no significant difference between the 3-ADON and 15-ADON isolates. However, the aggressiveness of NIV isolates was significantly lower than that of the 3-ADON and 15-ADON isolates. The DON content in grains from heads inoculated with the 3-ADON isolates was higher than the content of 15-ADON and NIV isolates. The results showed that 15-ADON population had the advantage in perithecia formation and ascospore release, and the 3-ADON population produced more DON in wheat grains. We suggested that distribution of these three chemotype populations may be related to these biological characteristics.

Suggested Citation

  • Yang-yang Liu & Han-yan Sun & Wei Li & Yun-lei Xia & Yuan-yu Deng & Ai-xiang Zhang & Huai-gu Chen, 2017. "Fitness of three chemotypes of Fusarium graminearum species complex in major winter wheat-producing areas of China," PLOS ONE, Public Library of Science, vol. 12(3), pages 1-13, March.
    • Handle: RePEc:plo:pone00:0174040
    DOI: 10.1371/journal.pone.0174040
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    Cited by:

    1. Chen Huang & Manu P Gangola & Seedhabadee Ganeshan & Pierre Hucl & H Randy Kutcher & Ravindra N Chibbar, 2019. "Spike culture derived wheat (Triticum aestivum L.) variants exhibit improved resistance to multiple chemotypes of Fusarium graminearum," PLOS ONE, Public Library of Science, vol. 14(12), pages 1-12, December.

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