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An avirulence gene to rice cultivar K60 is located on the 1.6-Mb chromosome in Magnaporthe oryzae isolate 84R-62B

  • Fungal Diseases
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Abstract

A Japanese differential rice cultivar K60 was tested with 114 F1 cultures of Magnaporthe oryzae from a cross between isolates 84R-62B and Y93-245c-2. Segregation patterns of avirulence and virulence in the progeny suggested that avirulence on cv. K60 was controlled by a single gene derived from 84R-62B and tentatively named AvrK60. In the F1 population, AvrK60 cosegregated with avirulence gene AvrPik on a small 1.6-Mb chromosome of 84R-62B and with the 1.6-Mb chromosome itself. Therefore, we suggest that, along with AvrPik, AvrK60 is also located on the 1.6-Mb chromosome of 84R-62B.

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Acknowledgments

We are grateful to H. Sezaki of Saga University for technical support in the inoculation experiments. Special thanks are due to H. Yaegashi, former professor at Saga University, for providing valuable suggestions.

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Authors and Affiliations

  1. Laboratory of Plant Pathology, Faculty of Agriculture, Saga University, Honjo1, Saga, 840-8502, Japan

    Motoaki Kusaba, Hiromi Hanamura, Masakazu Misaka & Taiga Mochida

  2. Department of Entomology, Soils, and Plant Sciences, Clemson University, Clemson, SC, USA

    Chao-Xi Luo

  3. National Agricultural Research Center, Rice Disease Resistance Research Team, Tsukuba, Ibaraki, Japan

    Yoshikatsu Fujita

  4. Laboratory of Plant Pathology, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan

    Yukio Tosa

Authors
  1. Motoaki Kusaba
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  2. Chao-Xi Luo
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  3. Hiromi Hanamura
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  4. Masakazu Misaka
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  5. Taiga Mochida
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  6. Yoshikatsu Fujita
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  7. Yukio Tosa
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Correspondence to Motoaki Kusaba.

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Kusaba, M., Luo, CX., Hanamura, H. et al. An avirulence gene to rice cultivar K60 is located on the 1.6-Mb chromosome in Magnaporthe oryzae isolate 84R-62B. J Gen Plant Pathol 74, 250–253 (2008). https://doi.org/10.1007/s10327-008-0094-4

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  • DOI: https://doi.org/10.1007/s10327-008-0094-4

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