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Updated: Jul 11, 2025

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基因表达的广泛变化伴随着线虫体型的进化

Gavin C Woodruff^1,2, John H Willis¹, Erik Johnson¹

¹University of Oregon, Eugene, Oregon, USA.

bioRxiv : the preprint server for biology

|November 14, 2023

概括

在Caenorhabditis inopinata中,大型线虫体型与细胞扩张有关. 基因表达分析揭示了C. inopinata和C. elegans之间广泛的转录分歧,为体型演变提供了洞察力.

科学领域:

进化生物学进化生物学
发展生物学发展生物学
基因组学就是基因组学.

背景情况:

身体尺寸是影响生态和进化模式的关键特征.
无花果相关的线虫Caenorhabditis inopinata,与C. elegans.等同类相比,表现出异常的大小.
以前的研究表明,C. inopinata的大小是由于幼虫到成人的发育过程中胚胎后细胞扩张引起的.

研究的目的:

研究C. inopinata和C. elegans之间体型差异的转录基础.
为了比较两种物种在幼虫到成人的过渡期间的基因表达模式.
识别与体型变异相关的不同表达动态的基因.

主要方法:

对C. elegans和C. inopinata在L3,L4和成年阶段进行了RNA测序 (RNA-seq).
在不同发育阶段进行了差异基因表达分析.
一种模型比较方法确定了与物种之间不同表达动态的ortologs.

主要成果:

大多数基因在两种物种的所有发育阶段都表现出差异性表达.
与神经元功能,行为,应激反应,发育时间和染色质调节相关的基因表现出不同的动态.
皮下原蛋白,变基因和TGF-β信号通路基因显示出独特的转录模式.
两种物种之间观察到广泛的转录分歧.

结论:

这项研究显示,在发育过程中,C. inopinata和C. elegans之间存在显著的转录分歧.
这种分歧可能反映了C. inopinata的独特生态和形态或Caenorhabditis属的一般发育系统漂移.
这些发现为未来的功能性研究提供了基础,这些研究将以身体尺寸进化的遗传基础为基础.

关键词:

这里是C. elegans.卡因诺哈比迪斯炎是什么?身体的尺寸身体的大小这就是Evo-devo的意思.翻译学翻译学翻译学翻译学

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