转录组范围的关联研究与eQTL分析相结合,揭示了Arabidopsis中基因表达和开花时间之间的遗传联系
Pei-Shan Chien1, Pin-Hua Chen1, Cheng-Ruei Lee2,3
1Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan.
Journal of experimental botany
|July 7, 2023
概括
转录全基因组关联研究 (TWAS) 与表达量化特征位置 (eQTL) 分析相结合,有效地确定了调节Arabidopsis.com花期的关键基因. 这种方法揭示了涉及FRIGIDA基因的监管热点,影响下游目标,如FLC和SOC1.1.
科学领域:
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
- 人口遗传学 人口遗传学
背景情况:
- 全基因组关联研究 (GWAS) 识别了与特征相关的遗传变异,但难以区分因果关系与链接不平衡.
- 全转录组关联研究 (TWAS) 提供了一种方法,可以直接将基因表达与表型变异联系起来,从而有助于候选基因优先级.
研究的目的:
- 评估TWAS在识别与复杂特征相关的基因中的实用性,特别是Arabidopsis.
- 通过将TWAS与表达量化特征位置 (eQTL) 分析相结合,研究支开花时间的调控机制.
主要方法:
- 进行了TWAS,以识别与阿拉比多普西斯的各种特征相关的基因,包括开花时间.
- 进行了与开花时间相关的6个TWAS识别基因的功能验证.
- 利用eQTL分析识别监管热点及其对基因表达的影响.
主要成果:
- TWAS成功地发现了以前已知的调节生长和新陈代谢的基因,以及六个用于开花时间的新基因.
- 一个跨调节热点被确定,包括FRIGIDA (FRI) 基因,影响下游基因的表达,如FLOWERING LOCUS C (FLC) 和CO 1 (SOC1) 的过度表达抑制器.
- 在自然加入中发现了FRI多个独立的功能丧失途径.
结论:
- TWAS是一种可行的方法,用于识别与复杂特征相关的候选基因.
- 整合TWAS和eQTL分析对于剖析监管模块,如FRI-FLC-SOC1路径,控制自然种群中的定量特征,是非常强大的.
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