Isolation of a Novel Lodging Resistance QTL Gene Involved in Strigolactone Signaling and Its Pyramiding with a QTL Gene Involved in Another Mechanism
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Kenji Yano, Taiichiro Ookawa, Koichiro Aya, Yusuke Ochiai, Tadashi Hirasawa, Takeshi Ebitani, Takeshi Takarada, Masahiro Yano, Toshio Yamamoto, Shuichi Fukuoka, Jianzhong Wu, Tsuyu Ando, Reynante Lacsamana Ordonio, Ko Hirano, Makoto Matsuoka
Molecular Plant, 2015, 8(2): 303-314 DOI: 10.1016/j.molp.2014.10.009; 追溯原文......本站官方QQ群：62473826
culm; OsTB1; strigolactone; lodging resistance; quantitative trait loci
1
Bioscience and Biotechnology Center, Nagoya University, Nagoya, Aichi 464-8601, Japan
2
Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
3
Agricultural Research Institute, Toyama Agricultural, Forestry & Fisheries Research Center, Toyama 939-8153, Japan
4
National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan
Lodging has been a major roadblock to attaining increased crop productivity. In an attempt to understand the mechanism for culm strength in rice, we isolated an effective quantitative trait locus (QTL), STRONG CULM3 (SCM3), the causal gene of which is identical to rice TEOSINTE BRANCHED1 (OsTB1), a gene previously reported to positively control strigolactone (SL) signaling. A near-isogenic line (NIL) carrying SCM3 showed enhanced culm strength and increased spikelet number despite the expected decrease in tiller number, indicating that SL also has a positive role in enhancing culm strength and spikelet number. We produced a pyramiding line carrying SCM3 and SCM2, another QTL encoding APO1 involved in panicle development. The NIL-SCM2+SCM3 showed a much stronger culm than NIL-SCM2 and NIL-SCM3 and an increased spikelet number caused by the additive effect of these QTLs. We discuss the importance of utilizing suitable alleles of these STRONG CULM QTLs without inducing detrimental traits for breeding.
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基因列表◄
TCP轉(zhuǎn)錄因子; 分蘗調(diào)控基因; 莖稈強(qiáng)度 OsTB1; FC1; SCM3; MP3