在器官大小上出现了一种新的左右不对称的演变,通过组织旋转过程的选择
Bénédicte M Lefèvre1, Marine Delvigne1, Aurélie Camprodon2
1Université Paris Cité, CNRS, Institut Jacques Monod, F-75013 Paris, France.
概括
男性果生殖器的新型左右不对称性是通过保存组织旋转过程进化而来的. 不对称的叶片大小取决于旋转完成,而方向决定了侧向,揭示了器官不对称的新机制.
科学领域:
- 发展生物学 发展生物学
- 进化生物学 进化生物学
- 动物行为 动物行为
背景情况:
- 左右不对称性在动物中很常见,影响器官的形状和功能.
- 新型不对称性的进化起源仍然不太清楚.
- 雄性Drosophila pachea表现出独特的不对称的生殖器和右侧交配姿势.
研究的目的:
- 研究Drosophila pachea新型生殖器不对称性背后的发育机制.
- 为了确定不对称的生殖器是如何演变的,以及它们是否影响交配行为.
- 确定组织旋转在产生器官不对称性中的作用.
主要方法:
- 在Drosophila pachea的幼旋转期间检查了男性生殖器的发育.
- 使用药物应用和CRISPR-Cas9来改变生殖器的旋转.
- 评估操纵的生殖器不对称性对交配姿势的影响.
主要成果:
- 男性不对称的生殖器叶片在保存的360°时针方向的组织旋转过程中发展.
- 不对称的叶片大小取决于生殖器轮转的完成.
- 旋转的方向决定了叶片不对称性的侧面性.
- 反向的生殖器不对称性并没有改变典型的右侧交配姿势.
结论:
- 在Drosophila pachea中,新的生殖器不对称性是通过先前存在的组织重塑过程的合作选择而演变的.
- 组织旋转是一种新发现的机制,用于产生双边器官大小不对称.
- 在这种物种中,右侧交配行为是独立于男性生殖器不对称的.
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