完整的叶绿体基因组 perforatum 和动态进化 在 (Hypericaceae)
Xinyu Liu1, Yuran Bai1, Yachao Wang2
1School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China.
International journal of molecular sciences
|November 25, 2023
概括
包括圣约翰草在内的五种Hypericum物种的叶绿体基因组显示出显著的变异和重排. 这些变化与反转的重复区域动态和基因丢失有关,影响基因组大小.
科学领域:
- 植物基因组学 植物基因组学
- 分子进化是分子进化的过程.
- 药用植物学 药用植物学
背景情况:
- 胡草 (Hypericum perforatum) 是一种重要的药用植物.
- 叶绿体基因组对于植物的进化和功能至关重要.
- 了解基因组变异有助于识别进化机制.
研究的目的:
- 测序了Hypericum perforatum的整个叶绿体基因组.
- 在五种Hypericum物种中比较基因组变异.
- 在Hypericum中阐明 хлоропласт基因组重组背后的机制.
主要方法:
- 整个叶绿体基因组测序H. perforatum. 的.
- 对五种Hypericum物种进行比较基因组分析.
- 鉴定基因损失,伪基因化和内部损失事件.
主要成果:
- H. perforatum хлоропласт的基因组为 139,725 bp,具有典型的四部分结构.
- 在Hypericum物种中观察到显著的基因组大小变化和重组.
- 基因组变异与IR扩张/收缩,基因损失 (trnK-UUU,infA,rps16) 和伪基因化 (rps7,rpl23,rpl32) 有关.
- 在clpP,rps12和ycf3中注意到了特定内子的损失.
- 长时间的重复序列可能会促进重新排列.
- 大多数基因都在进行净化选择.
结论:
- 化的基因组表现出动态的重组和变异.
- 反向重复区域和基因丢失是基因组大小变化的关键驱动因素.
- 重复序列在促进基因组重组方面发挥着重要作用.
- 这些发现提供了对Hypericum chloroplast基因组的进化动态的见解.
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