The OsSPL16-GW7 regulatory module determines grain shape and simultaneously improves rice yield and grain quality
The OsSPL16-GW7 regulatory module determines grain shape and simultaneously improves rice yield and grain quality
复制标题
OsSPL16-GW7调控模块决定谷物形状，同时提高水稻产量和谷物品质
DOI：
10.1038/ng.3352
复制
发表时间：
2015-08-01
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;Li, Shan;Fu, Xiangdong
杂种优势在杂交水稻品种中的应用提高了粮食产量，但粮食品质的改善仍然是一个挑战。在这里，我们表明，一个数量性状位点的稻米品质，qGW 7，反映了等位基因变异的GW 7，基因编码的TONNEAU 1招募基序蛋白与人类中心体蛋白CAP 350的C-末端基序相似。GW 7表达的上调与更细长颗粒的产生相关，这是纵向细胞分裂增加和横向细胞分裂减少的结果。OsSPL 16（GW 8）是一个调节粒宽的SBP结构域转录因子，它直接与GW 7启动子结合并抑制其表达。热带粳稻半显性GW 7（TFA）等位基因的存在与较高的籽粒品质没有Basmati gw 8等位基因施加的产量惩罚。因此，操纵OsSPL 16-GW 7模块代表了同时提高水稻产量和谷粒品质的新策略。
The deployment of heterosis in the form of hybrid rice varieties has boosted grain yield, but grain quality improvement still remains a challenge. Here we show that a quantitative trait locus for rice grain quality, qGW7, reflects allelic variation of GW7, a gene encoding a TONNEAU1-recruiting motif protein with similarity to C-terminal motifs of the human centrosomal protein CAP350. Upregulation of GW7 expression was correlated with the production of more slender grains, as a result of increased cell division in the longitudinal direction and decreased cell division in the transverse direction. OsSPL16 (GW8), an SBP-domain transcription factor that regulates grain width, bound directly to the GW7 promoter and repressed its expression. The presence of a semidominant GW7(TFA) allele from tropical japonica rice was associated with higher grain quality without the yield penalty imposed by the Basmati gw8 allele. Manipulation of the OsSPL16-GW7 module thus represents a new strategy to simultaneously improve rice yield and grain quality.