转录因子结合部位的遗传变异在很大程度上解释了玉米的表型遗传性
Julia Engelhorn1,2,3, Samantha J Snodgrass4, Amelie Kok1,2,5,6
1Heinrich Heine University Düsseldorf, Faculty of Mathematics and Natural Sciences, Institute for Molecular Physiology, Düsseldorf, Germany.
Nature genetics
|August 11, 2025
概括
这项研究绘制了干旱期间玉米 (玉米) 转录因子结合部位的功能变异,确定了超过20万个结合定量特征位点 (bQTL),将遗传变异与特征变异联系起来.
科学领域:
- 基因组学就是基因组学.
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
背景情况:
- 了解基因型-表型关系需要在转录因子 (TF) 结合位点 (cis-元素) 映射功能变异.
- 全面的cis元素地图对于剖析玉米等作物的复杂特征至关重要.
研究的目的:
- 在不同的水条件下,用玉米叶构建一个泛.
- 识别和描述与TF结合位点占用相关的绑定定量性特征位点 (bQTL).
- 评估bQTL与玉米特征相关的功能意义.
主要方法:
- 在25种玉米杂交品种的泛基因组中量化了单个单个单个类型的TF足迹.
- 绘制了超过20万个与cis元素占用相关的遗传和/或表观遗传变异 (bQTL).
- 通过与已知特征位点的巧合,基偏差分析和遗传变异分区来验证bQTL的意义.
主要成果:
- 在良好的灌和干旱条件下开发了玉米叶子的泛基组.
- 识别了超过20万个与TF绑定站点占用相关的bQTL.
- 证明bQTL解释了143种表型的遗传性特征变异的很大一部分 (~72%).
结论:
- 开发出来的泛组为了解玉米的功能性 cis 变异提供了宝贵的资源.
- bQTL具有功能意义,并捕获大量遗传性特征变异,有助于特征调节研究.
- 这种方法使得大规模的功能性 cis-变异发现能够用于遗传学研究和作物工程.
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