开花的LOCUS T类基因的进化:一个核心的Lamiiales特异性的多样化
Jiu-Xia Zhao1,2, Shu Wang3,2,4, Jing Wen1,2
1Yunnan Key Laboratory of Crop Wild Relatives Omics, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China.
Journal of experimental botany
|April 20, 2024
概括
植物的开花时间由FT和TFL1基因调节. 这项研究揭示了Lamiiales序列内的FT类基因的广泛,谱系特异性的扩张和多样化,推动了开花时间的多样性.
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:
- 植物生命史取决于发芽和开花时间,这些时间由酸乙醇胺结合蛋白 (PEBPs) 调节,如开花地点T (FT) 和终端花1 (TFL1).
- 类似FT的基因在植物谱系中表现出显著的副本数变异,与保存的类似TFL1的基因形成鲜明对比.
研究的目的:
- 系统地分析血管苗中FT类基因的扩张和多样化,重点关注Lamiales序列.
- 研究进化机制,包括全基因组复制和并联放大,驱动FT类基因扩张在核心Lamiales家族.
- 基于表达模式和结构变异,探索扩展的FT类基因的功能分歧.
主要方法:
- 对血管种中PEBP基因的系统分析,重点关注来自Lamiales序列的12种具有高质量基因组的代表物种.
- 比较基因组学用于识别特定系谱的基因扩展事件,包括全基因组重复 (cL-WGD) 和并列重复.
- 对基因表达模式和结构变异的分析,以推断功能多样化.
主要成果:
- 在核心Lamiales家族中确定了FT类基因的连续,谱系特定的扩张.
- 与FT1相似的基因主要通过核心Lamiiales特异的全基因组重复 (cL-WGD) 扩展,而与FT2相似的基因则来自随机重复.
- 扩展的FT类基因表现出多样化的表达模式和结构变异,表明功能多样化. 一些Lamiiales物种保留了古老的MFT2基因.
结论:
- 类似FT的基因在Lamiiales中经历了动态的,谱系特定的扩张,对开花时间的多样性做出了重大贡献.
- 像cL-WGD和合重复等进化机制已经塑造了Lamiales的FT类基因库.
- 这项研究提供了关键的进化见解,对基因调节网络控制花期时间在Lamiiales和angiosperms.
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