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Gene expression signatures of mating system evolution.

Suzy C P Renn1, Heather E Machado1,2, Nina Duftner3

  • 1a Department of Biology, Reed College.

Genome
|September 26, 2017
PubMed
Summary
This summary is machine-generated.

Convergent evolution of monogamy in cichlids involves similar gene expression changes. This study reveals shared molecular mechanisms underlying the independent evolution of social behavior in fish mating systems.

Keywords:
cichlidcichlidésdeep homologyexpression géniquegene expressionhomologie profondemonogamiemonogamypolygyniepolygyny

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Area of Science:

  • Evolutionary biology
  • Neurogenetics
  • Animal behavior

Background:

  • Mating systems exhibit remarkable diversity across taxa, with similar systems evolving independently.
  • Understanding the genomic basis of convergent social phenotypes remains a challenge.

Purpose of the Study:

  • To investigate the neuromolecular underpinnings of social organization evolution in Ectodini cichlids.
  • To test if independent transitions to monogamy recruit similar gene sets.

Main Methods:

  • Comparative transcriptomic analysis of field-collected male and female cichlids from four species.
  • Examining gene expression profiles related to social organization across independent evolutionary transitions.

Main Results:

  • Social phenotype, specifically monogamy, drives gene expression evolution alongside lineage and species.
  • 331 genes (approximately 6% of those assayed) were associated with monogamous mating systems, independent of species or sex.
  • A bias towards increased gene expression in monogamous individuals was observed.

Conclusions:

  • Convergent evolution of monogamy in Ectodini cichlids is associated with shared molecular mechanisms.
  • Deep molecular homologies likely underlie the parallel evolution of social behavior in these fish lineages.