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Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...

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Related Experiment Video

Updated: May 6, 2026

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks

Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks

Published on: May 13, 2016

Kin selection, genomics and caste-antagonistic pleiotropy.

David W Hall¹, Soojin V Yi, Michael A D Goodisman

¹Department of Genetics, University of Georgia, , Athens, GA 30602, USA.

Biology Letters

|October 18, 2013

Summary

Kin selection drives social evolution. New genomic data reveal caste-antagonistic pleiotropy in social insects, showing multiple mating by queens hinders worker evolution.

Keywords:

antagonistic selection eusocial insect caste molecular evolution sexual selection social conflict

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Area of Science:

Evolutionary biology
Behavioral ecology
Genomics

Background:

Kin selection theory is crucial for understanding social behavior evolution.
Genomic data offer new avenues to empirically test kin selection hypotheses.
Previous research linked genomic variation patterns to kin selection.

Purpose of the Study:

To present a novel theory on the evolution of genes in social insect development.
To investigate caste-antagonistic pleiotropy and its impact on social insect evolution.
To explore how multiple mating influences caste evolution.

Main Methods:

Theoretical modeling of gene evolution under kin selection.
Analysis of caste-antagonistic pleiotropy at single loci.
Simulation of allele fixation dynamics with varying mating rates.

Main Results:

Caste-antagonistic pleiotropy restricts polymorphic regions within the genome.
Multiple mating by queens significantly reduces the fixation of worker-beneficial alleles.
These findings suggest multiple mating impedes the evolution of the worker caste.

Conclusions:

Genomic approaches provide powerful tools to test kin selection theory.
Caste-antagonistic pleiotropy and mating systems are key factors in social insect evolution.
Future genomic studies can further elucidate the mechanisms of kin selection.