Isolation of a Novel Lodging Resistance QTL Gene Involved in Strigolactone Signaling and Its Pyramiding with a QTL Gene Involved in Another Mechanism

作     者：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 

作者机构：Bioscience and Biotechnology Center Nagoya University Nagoya Aichi 464-8601 Japan Graduate School of Agriculture Tokyo University of Agriculture and Technology Fuchu Tokyo 183-8509 Japan Agricultural Research Institute Toyama Agricultural Forestry & Fisheries Research Center Toyama 939-8153 Japan National Institute of Agrobiological Sciences Tsukuba Ibaraki 305-8602 Japan These authors contributed equally to this article. 

出 版 物：《Molecular Plant》 (分子植物（英文版）)

年 卷 期：2015年第8卷第2期

页      面：303-314页

核心收录：

学科分类：090601[农学-基础兽医学] 09[农学] 0906[农学-兽医学] 0901[农学-作物学] 

基　　金：Genomics-based for Agricultural Improvement supported by a grant from the Ministry of Agriculture, Forestry and Fisheries of Japan (Genomics for Agricultural Innovation by the Japan Society for the Promotion of Science through a Grant-in-Aid for Scientific Research (A) 

主　　题：culm OsTB1 strigolactone lodging resistance quantitative trait loci 

摘      要：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 AP01 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.