Isolation of a Novel Lodging Resistance QTL Gene Involved in Strigolactone Signaling and Its Pyramiding with a QTL Gene Involved in Another Mechanism
Isolation of a Novel Lodging Resistance QTL Gene Involved in Strigolactone Signaling and Its Pyramiding with a QTL Gene Involved in Another Mechanism
复制标题
DOI：
10.1016/j.molp.2014.10.009
复制
发表时间：
2015-02-02
期刊：
影响因子：
27.5
通讯作者：
Matsuoka, Makoto
中科院分区：
文献类型：
--
作者：
Yano, Kenji;Ookawa, Taiichiro;Matsuoka, Makoto
倒伏一直是提高作物产量的主要障碍。为了了解水稻秆力的作用机制，我们分离了一个有效的数量性状基因座（QTL）--STRONG CULM 3（SCM 3），其致病基因与水稻TEOS 1 NTE BRANCHED 1（OsTB 1）相同，后者是一个先前报道的正控制独脚金内酯（SL）信号传导的基因。携带SCM 3的近等基因系（NIL）表现出增强的秆强度和增加的小穗数，尽管预期的分蘖数减少，表明SL在增强秆强度和小穗数方面也具有积极作用。我们获得了一个携带SCM 3和SCM 2的转育系，SCM 2是另一个编码与穗发育有关的AP 01的QTL。NIL-SCM 2 + SCM 3比NIL-SCM 2和NIL-SCM 3具有更强的茎秆，并且这些QTL的加性效应导致了小穗数的增加。我们讨论了利用这些强茎QTL的合适等位基因而不诱导有害性状的育种的重要性。
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 TEOS1NTE 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.