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New approach for rice improvement using a pleiotropic QTL gene for lodging resistance and yield

Author

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  • Taiichiro Ookawa

    (Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu)

  • Tokunori Hobo

    (Bioscience and Biotechnology Center, Nagoya University, Nagoya)

  • Masahiro Yano

    (QTL Genomics Research Center, National Institute of Agrobiological Sciences, Tsukuba)

  • Kazumasa Murata

    (Agricultural Research Institute, Toyama Agricultural, Forestry & Fisheries Research Center, Toyama)

  • Tsuyu Ando

    (Institute of the Society for Techno-Innovation of Agriculture, Forestry, and Fisheries, Tsukuba)

  • Hiroko Miura

    (Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu)

  • Kenji Asano

    (Bioscience and Biotechnology Center, Nagoya University, Nagoya)

  • Yusuke Ochiai

    (Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu)

  • Mayuko Ikeda

    (Bioscience and Biotechnology Center, Nagoya University, Nagoya)

  • Ryoichi Nishitani

    (Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu)

  • Takeshi Ebitani

    (Agricultural Research Institute, Toyama Agricultural, Forestry & Fisheries Research Center, Toyama)

  • Hidenobu Ozaki

    (Agricultural Research Institute, Toyama Agricultural, Forestry & Fisheries Research Center, Toyama)

  • Enrique R. Angeles

    (Bioscience and Biotechnology Center, Nagoya University, Nagoya)

  • Tadashi Hirasawa

    (Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu)

  • Makoto Matsuoka

    (Bioscience and Biotechnology Center, Nagoya University, Nagoya)

Abstract

The use of fertilizer results in tall rice plants that are susceptible to lodging and results in reduced plant yields. In this study, using chromosome segment substitution lines, we identified an effective quantitative trait loci (QTL) for culm strength, which was designated STRONG CULM2 (SCM2). Positional cloning of the gene revealed that SCM2 was identical to ABERRANT PANICLE ORGANIZATION1 (APO1), a gene previously reported to control panicle structure. A near-isogenic line carrying SCM2 showed enhanced culm strength and increased spikelet number because of the pleiotropic effects of the gene. Although SCM2 is a gain-of-function mutant of APO1, it does not have the negative effects reported for APO1 overexpression mutants, such as decreased panicle number and abnormal spikelet morphology. The identification of lodging-resistance genes by QTL analysis combined with positional cloning is a useful approach for improving lodging resistance and overall productivity in rice.

Suggested Citation

  • Taiichiro Ookawa & Tokunori Hobo & Masahiro Yano & Kazumasa Murata & Tsuyu Ando & Hiroko Miura & Kenji Asano & Yusuke Ochiai & Mayuko Ikeda & Ryoichi Nishitani & Takeshi Ebitani & Hidenobu Ozaki & Enr, 2010. "New approach for rice improvement using a pleiotropic QTL gene for lodging resistance and yield," Nature Communications, Nature, vol. 1(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:1:y:2010:i:1:d:10.1038_ncomms1132
    DOI: 10.1038/ncomms1132
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