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

Taiichiro Ookawa (), Tokunori Hobo, Masahiro Yano, Kazumasa Murata, Tsuyu Ando, Hiroko Miura, Kenji Asano, Yusuke Ochiai, Mayuko Ikeda, Ryoichi Nishitani, Takeshi Ebitani, Hidenobu Ozaki, Enrique R. Angeles, Tadashi Hirasawa and Makoto Matsuoka
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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

Nature Communications, 2010, vol. 1, issue 1, 1-11

Abstract: 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.

Date: 2010
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DOI: 10.1038/ncomms1132

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