在米花发育中涉及的微RNA目标基因上进行基因组范围内的选择剖析
Fen Zhang1, Li-Zhen Ling2, Li-Zhi Gao1,2
1Engineering Research Center for Selecting and Breeding New Tropical Crop Varieties, Ministry of Education, Tropical Biodiversity and Genomics Research Center, Hainan University, Haikou 570228, China.
Plants (Basel, Switzerland)
|December 17, 2024
概括
花的发育涉及到对微RNA (miRNA) 标的明显选择压力. 保存的miRNA结合部位显示净化选择,而非保存的部位表现出种群特定的变异,表明在表型多样性中的作用.
科学领域:
- 植物遗传学和基因组学
- 进化生物学是进化的生物学.
- 分子生物学分子生物学
背景情况:
- 全基因组研究已经确定了在养物种中选择的区域.
- 在特定的生物过程中,对微RNA (miRNA) 相关动机的特征选择模式仍然未得到充分研究.
研究的目的:
- 进行基因组范围内的核酸变异和与米花发育相关的miRNA点的选择分析.
- 描述不同水种群对这些目标产生的不同选择压力.
主要方法:
- 来自全球多样化的亚洲种植大米和野生亲属的26个miRNA目标的重新测序.
- 在保存和非保存miRNA结合位点对核酸变异和选择模式的分析.
主要成果:
- 净化选择减少了保存的miRNA结合点的遗传变异,保持了序列完整性.
- 非中性进化,包括积极和/或人工选择,以特定种群的方式推动了非保存的结合点的高变异.
- 这些变异可能有助于花发展的表型多样性.
结论:
- 参与花发育的MiRNA标受到不同的进化选择制度的约束.
- 保存的结合点是通过净化选择来维持的,而非保存的结合点表现出适应变异,影响表型.
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