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Ants exhibit social polymorphism, with queen number variation driven by large supergenes. These supergenes, comprising hundreds of linked genes, are crucial for understanding ant social evolution and polymorphism.

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Area of Science:

  • Evolutionary Biology
  • Genomics
  • Social Insects

Background:

  • Species often display alternative morphs, influenced by genetics or environment.
  • Ants show social polymorphism, particularly in queen number (single vs. multiple queens).
  • This variation correlates with traits like colony founding, queen lifespan, and colony size.

Purpose of the Study:

  • To synthesize findings on supergene-based social polymorphism in ants.
  • To highlight commonalities and unique aspects across five ant lineages.
  • To discuss implications for the evolution of polymorphisms.

Main Methods:

  • Review and synthesis of existing research on ant social polymorphism.
  • Analysis of genetic underpinnings, specifically focusing on supergenes.
  • Examination of evolutionary dynamics, including speciation and introgression.

Main Results:

  • Social morph in ants is consistently determined by large supergenes across studied lineages.
  • These supergenes are formed by serial inversions and contain numerous linked genes.
  • Supergenes have evolutionary persistence, spread via introgression, and exhibit complex dynamics.

Conclusions:

  • Supergenes are a key genomic feature driving social polymorphism in ants.
  • Understanding these supergenes provides insights into the evolution of complex traits.
  • The study emphasizes the significant role of genomic architecture in evolutionary outcomes.