Control of grain size, shape and quality by OsSPL16 in rice
Control of grain size, shape and quality by OsSPL16 in rice
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OsSPL16 对水稻籽粒大小、形状和品质的控制
DOI：
10.1038/ng.2327
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发表时间：
2012-08-01
期刊：
影响因子：
30.8
通讯作者：
Fu, Xiangdong
中科院分区：
文献类型：
--
作者：
Wang, Shaokui;Wu, Kun;Fu, Xiangdong
籽粒大小和形状是粮食产量和品质的重要组成部分，自谷物首次驯化以来就一直处于选择状态。在这里，我们证明了数量性状基因座GW8与OsSPL16同义，OsSPL16编码一种对细胞增殖起正向调节作用的蛋白质。该基因的高表达促进了细胞分裂和籽粒灌浆，对水稻的粒宽和产量产生了积极的影响。相反，巴斯马蒂水稻的功能缺失突变与形成更细长的谷粒和更好的外观质量有关。GW8基因座的籽粒大小和等位基因变异之间的相关性表明，在水稻育种中可能选择了启动子区域内的突变。我们还表明，针对GS3和OsSPL16的优势等位基因的标记辅助策略可以有效地用于同时改善籽粒品质和产量。
Grain size and shape are important components of grain yield and quality and have been under selection since cereals were first domesticated. Here, we show that a quantitative trait locus GW8 is synonymous with OsSPL16, which encodes a protein that is a positive regulator of cell proliferation. Higher expression of this gene promotes cell division and grain filling, with positive consequences for grain width and yield in rice. Conversely, a loss-of-function mutation in Basmati rice is associated with the formation of a more slender grain and better quality of appearance. The correlation between grain size and allelic variation at the GW8 locus suggests that mutations within the promoter region were likely selected in rice breeding programs. We also show that a marker-assisted strategy targeted at elite alleles of GS3 and OsSPL16 underlying grain size and shape can be effectively used to simultaneously improve grain quality and yield.