非编码元素的融合进化与鸟类的短长相关
Subir B Shakya1,2, Scott V Edwards3, Timothy B Sackton4,3
1Informatics Group, Harvard University, Cambridge, MA, USA. subirshakya@gmail.com.
BMC biology
|February 21, 2025
概括
鸟类的融合进化显示了骨发育基因附近的加速调节元素,而不是蛋白质编码基因,驱动了类似的长度适应.
科学领域:
- 进化生物学 进化生物学
- 基因组学就是基因组学.
- 比较解剖学的比较解剖学
背景情况:
- 融合进化描述了在非相关物种中独立进化的相似特征.
- 基因组签名,就像改变的替代率一样,可以揭示分子水平的融合.
- 这项研究使用基因组和种群数据调查鸟类长的融合进化.
研究的目的:
- 为了识别鸟类长的独立变化.
- 为了检测较短的鸟类的分子水平上的融合进化变化. tarsi.
- 将基因组变化与骨特征的进化联系起来.
主要方法:
- 分析了来自5400种鸟类的塔尔索斯测量结果.
- 利用了932,467个鸟类保存的非外来元素 (CNEEs) 的数据集和79只鸟类的全基因组对齐.
- 进行了比较的基因组和人口遗传分析.
主要成果:
- 在短鸟类群中,在14422个CNEE中发现了对汇聚加速的有力证据.
- 在9854个编码蛋白质的基因中没有观察到收的积极选择模式.
- 加速元素集中在参与骨系统发育的基因附近,这表明调节元素参与其中.
结论:
- 调节元件显示趋同加速,在趋同的骨特征中发挥关键作用.
- 这些发现支持了调控因素在骨表型演变中的重要性.
- 确定了四肢发育基因调节中的融合变化.
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