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

作者：Ookawa Taiichiro^*; Hobo Tokunori; Yano Masahiro; Murata Kazumasa; Ando Tsuyu; Miura Hiroko; Asano Kenji; Ochiai Yusuke; Ikeda Mayuko; Nishitani Ryoichi; Ebitani Takeshi; Ozaki Hidenobu; Angeles Enrique R; Hirasawa Tadashi; Matsuoka Makoto

来源：Nature Communications, 2010, 1(1): 132.

DOI：10.1038/ncomms1132

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.

• 出版日期2010-11