The evolutionary impact of Robertsonian fusions: linking genomic architecture, recombination and reproduction

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ID: 326477
2026
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Abstract
Determining the genomic basis of speciation remains a central challenge in evolutionary biology, including the role of large-scale structural genome reorganizations, such as inversions and chromosomal fusions. While extensive theoretical and empirical work has shown that inversions can facilitate adaptation and speciation by suppressing recombination and maintaining co-adapted gene complexes, the evolutionary role of chromosomal fusions remains comparatively underexplored. This gap contrasts with the widespread occurrence of chromosomal fusions across eukaryotes. Here, we synthesize current knowledge on the mechanisms driving the formation of chromosomal fusions in mammals and their consequences for genome architecture, recombination and evolution. We discuss how fusions reshape recombination landscapes and meiotic patterns, highlighting emerging evidence that these structural rearrangements influence higher-order chromatin organization. Together, the available data support a mechanistic link between genome architecture, reproduction and evolutionary processes. Integrating molecular and cellular insights into evolutionary frameworks is therefore essential to understand how structural variation contributes to adaptive divergence and the emergence of reproductive isolation.
Reference Key
openalex_W7204271741 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Cristina Marín-García, Aurora Ruiz‐Herrera
Journal journal of evolutionary biology
Year 2026
DOI
10.1093/jeb/voag080
URL
https://doi.org/10.1093/jeb/voag080
Keywords Keywords not found

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