引发EMS突变的非随机分布揭示了对大米中开放色素和表达基因的偏好
Xue-Feng Yao1, Yanhong Liu2, Zhiyong Li2
1Key Laboratory of Plant Molecular Physiology, State Key Laboratory of Forage Breeding-by-Design and Utilization, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 13, 2025
概括
中的甲基乙硫酸盐 (EMS) 突变发生并非随机发生. 突变优先发生在开放的染色质和活跃表达的基因中,特别是在转录开始地点附近.
科学领域:
- 遗传学 是一个遗传学.
- 基因组学就是基因组学.
- 植物科学 植物科学
背景情况:
- 突变发生对于作物改进和功能基因组学至关重要.
- 化学诱导突变的分布是有争议的,对它们的基因组位置和与染色质状态或基因表达的关系进行有限的系统调查.
研究的目的:
- 为了研究基因组中乙基甲硫酸盐 (EMS) 诱导的突变的分布模式.
- 为了确定EMS突变是否与染色质可访问性和基因表达水平相关.
主要方法:
- 从EMS处理中获得的4,619个变异性M3大米线的测序.
- 识别和分析超过700万个单核酸突变 (SNP).
- 基因组,表观基因组和基因表达数据的整合.
主要成果:
- 已识别的SNPms实现了大米基因 (>97%) 的高覆盖率.
- 发现EMS诱导的SNPms分布非随机,有利于开放的染色质区域.
- 突变丰富在活跃表达的基因中,与转录起点 (TSSs) 相比,对异合体和同合体SNPm的特定丰富模式.
结论:
- 中的乙基甲硫酸盐 (EMS) 诱导的突变并不随机分布在整个基因组中.
- 突变显示出对具有功能意义的基因组区域的偏好,包括开放色素和积极转录的基因.
- 这些发现挑战了随机突变分布的假设,并突出了基因组背景对突变发生的影响.
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