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Updated: Jun 19, 2025

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多个胚胎来源汇聚在一起,形成斑马鱼的胸围骨架

Shunya Kuroda^1,2, Robert L Lalonde³, Thomas A Mansour⁴

¹Department of Genetics, Rutgers the State University of New Jersey, Piscataway, NJ, 08854, USA. kurodashunya@gmail.com.

Nature communications

|July 26, 2024

概括

研究人员追溯了斑马鱼胸皮带的胚胎起源,确定了cleithrum作为四足动物中丢失的祖先元素. 这一发现揭示了脊椎动物从水到陆的演变.

科学领域:

进化发育生物学进化发育生物学
比较解剖学的比较解剖学.
脊椎动物的古生物学

背景情况:

脊椎动物从水生生物向陆生生物的过渡涉及胸部和肩膀带的显著形态变化.
虽然四足动物肩带的发育已被理解,但鱼的胸带起源在很大程度上是未知的,这阻碍了我们对这种进化转变的理解.

研究的目的:

为了阐明斑马鱼 (Danio rerio) 胸皮带的胚胎起源.
为了确定祖先的腰带元素,并了解它们对从水到陆地过渡的贡献.
为乳房/肩带进化建立胚胎学框架.

主要方法:

在斑马鱼胚胎中利用了一种结合方法,整合了光转换和遗传血统追踪.
分析了不同胚胎细胞种群对清发育的贡献.
与化石和现存的脊椎动物解剖学相比较的胸皮带祖先数据.

主要成果:

确定了斑马鱼胸皮带的胚胎起源,包括cleithrum,一个在现存四足动物中缺少的祖先元素.
证明了cleithrum的发展涉及到四个相邻的胚胎种群的整合.
关联了对部进化至关重要的清损失,以及它在头部/干界面的独特发育的消失.

结论:

建立了胸部和肩膀腰带形成的详细胚胎学框架.
提供了关于腰带从水生鱼到陆地四足动物的进化轨迹的见解.
突出了脊椎动物陆地殖民时期祖先腰带元素丧失的发展基础.

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