RGN1 controls grain number and shapes panicle architecture in rice.

RGN1 controls grain number and shapes panicle architecture in rice.
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RGN1 控制水稻的粒数和塑造穗结构

DOI:
10.1111/pbi.13702
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发表时间:
2022-01
影响因子:
13.8
通讯作者:
Li Z
Li Z
中科院分区:
工程技术1区
文献类型:
--
作者:
Li G;Xu B;Zhang Y;Xu Y;Khan NU;Xie J;Sun X;Guo H;Wu Z;Wang X;Zhang H;Li J;Xu J;Wang W;Zhang Z;Li Z

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水稻的产量主要由穗结构决定。通过基于图位的克隆,我们鉴定了影响籽粒数量和穗结构的 R2R3 MYB 转录因子 REGULATOR OF GRAIN NUMBER1 (RGN1)。 RGN1 突变导致次生枝上侧粒缺失。我们证明 RGN1 通过调节 LONELY GUY (LOG) 表达来控制侧粒形成,从而控制粒数并塑造圆锥花序结构。源自野生稻 Or-I 组的一种新型有利等位基因 RGN1 C 通过更长的圆锥花序影响圆锥花序的结构。 RGN1的鉴定为理解水稻侧粒形成的分子机制提供了理论基础; RGN1将成为高产分子育种的重要基因资源。
Yield in rice is determined mainly by panicle architecture. Using map‐based cloning, we identified an R2R3 MYB transcription factor REGULATOR OF GRAIN NUMBER1 (RGN1) affecting grain number and panicle architecture. Mutation of RGN1 caused an absence of lateral grains on secondary branches. We demonstrated that RGN1 controls lateral grain formation by regulation of LONELY GUY (LOG) expression, thus controlling grain number and shaping panicle architecture. A novel favourable allele, RGN1 C, derived from the Or‐I group in wild rice affected panicle architecture by means longer panicles. Identification of RGN1 provides a theoretical basis for understanding the molecular mechanism of lateral grain formation in rice; RGN1 will be an important gene resource for molecular breeding for higher yield.
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