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自然负反循环赋予大米中的谷粒大小恒温的印加-日语差异化

Xingxing Li^1,2, Meng-En Wu^1,2, Ziqi Qiao^1,2

¹National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|February 4, 2026

概括

研究人员确定了控制谷粒大小的三个大米基因 (OsGRX8,OsbZIP47,OsbZIP08). 这些基因形成一个负反循环,微调OsGRX8表达的恒常性和影响作物产量特征.

科学领域:

植物生物学植物生物学
遗传学遗传学是一个
农业学是一种农业学.

背景情况:

器官大小稳态对于植物发育至关重要.
谷物大小是影响作物产量和质量的关键农学特征.
调节最终颗粒大小的分子机制在很大程度上是未知的.

研究的目的:

为了确定控制大米中谷粒长度变化的基因.
为了阐明粒度恒温的分子机制.
了解印加-日本分化在产量特征中的遗传基础.

主要方法:

全基因组协会研究 (GWAS) 确定候选基因.
基因相互作用分析 (蛋白质与蛋白质相互作用).
基因表达分析和促进体结合试验.

主要成果:

三个基因 (OsGRX8,OsbZIP47,OsbZIP08) 被确定为大米粒长度的关键调节者.
这些基因形成一个负反调节循环:OsbZIP47和OsbZIP08调节OsGRX8的表达,而OsGRX8调节OsbZIP47的活动.
OsbZIP08与OsGRX8促进体的差异性结合解释了印加-日本的变异.
两个自我调节的单元类型 (SRHs) 对谷粒大小和产量特征有显著的贡献.

结论:

一个新的OsGRX8-(OsbZIP47) -OsbZIP08-OsGRX8调节循环控制了大米粒大小的恒常性.
这种反机制微调了OsGRX8的自我表达,影响了颗粒大小.
这些发现提供了关于重要作物特征的QTL相互作用和遗传多样性的见解.

关键词:

粒度大小的恒常性粒度大小的恒常性印加-日本的差异化自然的负反循环.米米饭米饭米饭米饭.

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