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在头两动物物种的本体遗传头骨变异
Leandro Dos S L Hohl1, Concepción Azorit2, Aldo I Vassallo3
1Departamento de Zoologia, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, Laboratório de Zoologia de Vertebrados - Tetrapoda (LAZOVERTE), Rio de Janeiro, Rio de Janeiro, Brazil.
Journal of morphology
|October 19, 2023
概括
挖洞爬行动物Leposternon microcephalum的形头骨在发育过程中经历了显著的形状变化. 机体性全量学,或与大小相关的生长,是从青少年到成年阶段这些头骨形态变化的主要驱动因素.
科学领域:
- * 动物学 动物学
- * 比较解剖学研究
- * 形态测量方法 形态测量方法
背景情况:
- * Amphisbaenia是挖洞爬行动物,他们的头骨适合挖掘.
- *Leposternon小头具有高度专业化的形头骨,适合于紧的土壤.
- * 这种物种在南美洲广泛分布,在巴西的所有生物体中都能找到.
研究的目的:
- * 分析勒波斯特农小脑菌的本体遗传系列中的头骨形态变异.
- * 调查形形状发展中的本体遗传度学的作用.
- * 为了测试假设,骨分化模式在Amphisbaenia物种中得到保护.
主要方法:
- * 三维几何形态测量 (3D-GMM) 应用于L. microcephalum.的13个标本 (8个青少年,5个成年人) 上.
- *对计算机断层扫描中的20个同源地标进行分析.
- *主要组件和回归分析,以将头骨形状与大小相关联.
主要成果:
- * 在青少年和成年L. microcephalum.之间观察到头骨形态的显著差异.
- * 青少年呈现出一个高高的神经头骨和一个更前向的鼻子尖.
- * 头骨形状的变化与大小有很强的相关性,这表明具有主导性的本体遗传异构.
结论:
- * 在L. microcephalum的整个发育过程中,体遗传学对塑造其头骨起着至关重要的作用.
- *这些发现提供了关于安菲斯巴尼亚头骨进化适应的见解.
- * 需要进一步的比较研究来确认安菲斯巴尼亚中保存的分化模式.
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