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What is enantiotoky, and why doesn't it exist?

Christopher K Starr1

  • 1Caura Village, Trinidad and Tobago. ckstarr@gmail.com.

Journal of Genetics
|March 25, 2021
PubMed
Summary

The study explores enantiotoky, a rare form of reproduction where females are haploid and males diploid. This reproductive strategy is predicted to be highly unstable and unlikely to persist in animal populations.

Area of Science:

  • Reproductive biology
  • Evolutionary genetics
  • Hymenoptera

Background:

  • Arrhenotoky, where females develop from fertilized eggs and males from unfertilized eggs, is common in Hymenoptera.
  • Haplodiploidy is a reproductive system where sex is determined by chromosome number.

Purpose of the Study:

  • To investigate the theoretical possibility and stability of enantiotoky, a hypothetical form of haplodiploidy.
  • To analyze the evolutionary dynamics of a system where females are haploid and males are diploid.

Main Methods:

  • A thought experiment was designed to illustrate the concept of enantiotoky.
  • Theoretical modeling was used to assess the stability of enantiotoky.

Main Results:

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  • Enantiotoky, a system with haploid females and diploid males, has not been observed in nature.
  • The study predicts that enantiotoky would be evolutionarily unstable.
  • A theoretical model suggests enantiotoky would rapidly disappear if it were to evolve.

    • Conclusions:

    • Enantiotoky is a theoretically possible but evolutionarily unstable reproductive strategy.
    • The instability of enantiotoky suggests it is unlikely to evolve or persist in animal populations.
    • Further research could explore the genetic or ecological factors that might influence the stability of such systems.