Topological and variational modularity: A case study using the pectoral girdle across the Chrosomus eos-neogaeus hybridization complex.

4区 医学 Q2 Agricultural and Biological Sciences
Anatomical Record Pub Date : 2025-04-24 DOI:10.1002/ar.25666
Kevin K Duclos, Thomas Grünbaum, Bernard Angers, Richard Cloutier, Heather A Jamniczky
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引用次数: 0

Abstract

Modularity and integration are key developmental properties and have remained central in evo-devo research because of how they relate to evolvability. While modularity and integration have commonly been assessed with landmark-based geometric morphometrics (GMM), other methods such as anatomical network analysis (AnNA) are increasingly being explored. Nonetheless, AnNA has seldom been used to assess variability within taxa, and there have been no attempts to verify whether its results are commensurate with GMM. We used the pectoral girdle of members of the Chrosomus eos-neogaeus hybridization complex as a case study system to assess differences between AnNA and GMM-based approaches and discuss how they should be best used. The general anatomy and composition of the pectoral girdle do not vary much within the complex; however, bones within the pectoral girdle show significant diversity in morphology and in the presence of sutures. Indeed, C. neogaeus displays characteristically enlarged coracoids and radials, and bone fusion between the cleithra, coracoids, and radials, while C. eos displays a gracile and unfused pectoral girdle. Hybrids display morphologies that are distinct from both parental species. AnNA detected multiple potential patterns of modularity, and GMM supported similar patterns of modularity across the complex but suggested different trajectories of morphological variation. Altogether, AnNA can be a valuable tool to formulate novel hypotheses in understudied taxa, which may then be tested using GMM, but careful morphological descriptions of skeletal systems are a valuable addition to the interpretation of both AnNA and GMM approaches.

拓扑和变分模块化:一个案例研究,使用胸带跨越染色体eos-neogaeus杂交复合体。
模块化和集成是关键的发展特性,由于它们与可进化性的关系,一直是进化研究的中心。虽然模块化和集成度通常是用基于地标的几何形态计量学(GMM)来评估的,但其他方法,如解剖网络分析(AnNA)也在不断地被探索。然而,AnNA很少被用来评估分类群内部的变异性,也没有人试图验证其结果是否与GMM相称。我们使用了染色体eos-neogaeus杂交复合体的胸带成员作为一个案例研究系统来评估AnNA和基于gmm的方法之间的差异,并讨论如何最好地使用它们。一般解剖结构和胸带的组成在复合体内变化不大;然而,胸带内的骨骼在形态和缝合线的存在上表现出显著的多样性。事实上,C. neogaeus表现出典型的喙状骨和桡骨增大,锁骨、喙状骨和桡骨之间融合,而C. eos表现出纤细且不融合的胸带。杂交种表现出不同于亲本种的形态。AnNA检测到多种潜在的模块化模式,而GMM在整个复合体中支持类似的模块化模式,但显示出不同的形态变化轨迹。总之,AnNA可以成为在未充分研究的分类群中制定新假设的有价值的工具,然后可以使用GMM进行测试,但是骨骼系统的仔细形态学描述是对AnNA和GMM方法解释的有价值的补充。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Anatomical Record
Anatomical Record Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
4.30
自引率
0.00%
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0
期刊介绍: The Anatomical Record
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