类生物合成基因的重复和次功能化在Leguminosae根结节的共生进化中起着重要作用
Tengfei Liu1,2, Haiyue Liu2,3, Wenfei Xian4,5
1Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
Journal of integrative plant biology
|August 2, 2024
概括
基因重复导致豆类中的新基因,增强固化. 特定的重复基因,如 chalcone isomerase (CHI),在根结节共生 (RNS) 中演变为不同的角色.
科学领域:
- 进化生物学是进化的生物学.
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
背景情况:
- 豆类 (Leguminosae) 对于通过根结交生 (RNS) 进行农业固至关重要.
- 推动豆类RNS进化的基因创新尚未得到充分理解.
研究的目的:
- 调查促进豆类RNS演变的基因增益事件.
- 了解RNA中复制基因的功能分歧.
主要方法:
- 综合的家族基因分析以确定Leguminosae特定的基因增益.
- 基因和基因组的京都百科全书 (KEGG) 途径分析.
- 基因复制分析,包括串联复制和外子-内子结构比较.
- 在 *Glycine max* (大豆) 和 *Medicago truncatula* 中进行基因淘汰实验.
主要成果:
- 豆类特异性基因是通过重复获得的,并且正在进行净化选择.
- 创新的基因被丰富了黄类生物合成途径,特别是下游的 chalcone 合成酶 (CHS).
- 第二种类型的石同质酶 (CHI) 基因重复成CHI1A和CHI1B,显示结构分歧.
- 抑制CHI1B显著影响结节,而抑制CHI1A没有影响,表明功能分歧.
结论:
- 豆类获得的II型CHI对RNS至关重要.
- 重复的CHI1A和CHI1B基因表现出亚功能化,有助于豆类中的RNA适应.
- 这项研究揭示了豆类RNS进化中的遗传创新和功能分歧.
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