在型豆类中的核核蛋白基因的塑性核共进化
Lydia G Tressel1, Bikash Shrestha2, Chaehee Lee3
1Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA.
Molecular phylogenetics and evolution
|December 29, 2024
概括
植物基因组协调细胞功能,但核和塑体核糖体蛋白基因表现出快速的进化和共同进化,影响豆类的物种化和作物改善.
科学领域:
- 植物分子生物学 植物分子生物学
- 进化遗传学的进化遗传学
- 基因组学就是基因组学.
背景情况:
- 植物中的细胞功能依赖于协调的核,线粒体和塑基因组.
- 塑体中的多子单元蛋白质复合体涉及来自核和塑体基因组的基因.
- 了解塑核共同进化对于植物生物学来说至关重要.
研究的目的:
- 研究豆类中核编码的塑向性核体蛋白基因 (NuCpRP) 和塑编码的核体蛋白基因 (CpRP) 的共同进化.
- 分析不同基因组的替代率,以了解进化压力.
- 识别细胞核共同进化的信号及其对物种化和作物增强的影响.
主要方法:
- 对50种豆类类的5个基因组的替代率 (dN和dN/dS) 的比较分析.
- 利用了共同进化的统计和进化速率的共变.
- 检查的基因组包括NuCpRP,NuCyRP,NuCpOT,CpRP和CpPS.
主要成果:
- 与其他基因组相比,在CpRP和NuCpRP中观察到高的非同义替代率 (dN) 和dN/dS比率 (ω).
- 在特定的豆类类之间发现了CpRP和NuCpRP的dN的显著差异.
- 确定了细胞核共同进化的强烈信号,在CpRP和NuCpRP基因中同时发生替代.
结论:
- 由放松净化选择和积极选择驱动的细胞核共同进化,在豆类物种化中发挥着作用.
- 塑核基因不相容性可能会限制帕皮利诺伊德作物物种的基因增强.
- 这项研究突出了植物中核和塑基因组之间的进化动态.
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