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适应性进化和流动物中假定磁受体的损失

Corinna Langebrake^1,2, Georg Manthey^1,3, Anders Frederiksen³

¹Institute of Avian Research 'Vogelwarte Helgoland', 26386 Wilhelmshaven, Germany.

Proceedings. Biological sciences

|February 6, 2024

概括

密码染色体 (Cry) 是鸟类导航的关键. 这项研究揭示了Cry4a在歌鸟中演变为磁感应,而其他物种的基因损失为鸟类磁感应提供了新的研究途径.

科学领域:

* 进化生物学进化生物学
* 鸟类学鸟类学
* 分子生物学 * 分子生物学

背景情况:

* 迁徙鸟类使用复杂的导航,包括磁性指南针系统.
* 磁感应的主要生物传感器仍未确定.
*加密染色体 (Cry) 是潜在的磁传感器,鸟类的Cry4a显示出有前途.

研究的目的:

* 为了研究加密色素 (Cry) 在鸟类磁感受中的进化作用.
* 为了识别特定的Cry基因和参与磁感应的突变.

主要方法:

*对363个鸟类基因组进行了植物遗传学分析.
* 分子进化分析和蛋白质动态建模.
*比较基因组学以确定基因存在/缺席和选择压力.

主要成果:

* 鸟类Cry4a表现出强烈的阳性选择和高可变性,这是传感器蛋白质的特征.
* 在Cry4a中,特定的位置被确定为歌鸟在夜间定位的关键.
*观察到蜂鸟,和的Cry4基因丢失,而Cry1和Cry2则保留.

结论:

*Cry4a显示了歌鸟在磁感应方面的专业化证据.
*在某些鸟类群体中删除Cry4基因为功能研究提供了机会.
* Cry1和Cry2很可能在鸟类中提供保存的非感官功能.

关键词:

副盆地副盆地副盆地适应适应适应适应鸟类鸟类鸟类鸟类鸟类这就是加密染色.磁接收磁接收磁接收选择的选择选择的选择.

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