Haplodiploidy and the Evolution of Eusociality: Worker Reproduction

  title={Haplodiploidy and the Evolution of Eusociality: Worker Reproduction},
  author={Jo{\~a}o Alpedrinha and Stuart Andrew West and Andy Gardner},
  journal={The American Naturalist},
  pages={421 - 438}
Hamilton's haplodiploidy hypothesis suggests that the relatively higher relatedness of full sisters in haplodiploid populations promotes altruistic sib rearing and, consequently, the evolution of eusociality. [] Key Result Here, we relax these assumptions and find that worker reproduction has a negative influence on the evolution of helping, either reducing the extent to which it is promoted or leading to it being inhibited.

Haplodiploidy and the Evolution of Eusociality: Worker Revolution

Haplodiploidy has had a negligible influence on the evolution of eusociality, and a kin-selection approach is used to model the two scenarios suggested by Trivers and Hare.

Gene dynamics of haplodiploidy favor eusociality in the Hymenoptera

  • J. da Silva
  • Biology
    Evolution; international journal of organic evolution
  • 2022
The gene‐centric approach used here reveals the critical role of male haploidy in structuring the social group, and may favor eusociality in the absence of a female‐biased sex ratio in dispersing reproductive offspring.

The evolution of non-reproductive workers in insect colonies with haplodiploid genetics

This work derives precise conditions for natural selection to favor the evolution of non-reproductive workers from the effects, in situations where the queen of the colony has mated once or several times, of recessive and dominant sterility alleles acting in her offspring.

Ecology, Not the Genetics of Sex Determination, Determines Who Helps in Eusocial Populations

The evolutionary dynamics of adaptive virginity, sex‐allocation, and altruistic helping in haplodiploid animals

An analytical model for evolution of virgin reproduction, sex‐allocation, and altruistic female helping in haplodiploid taxa shows that when mating is costly, virginity can evolve as an adaptive female reproductive strategy, and shows that virginity can be an adaptive reproductive strategy also in primitively social haplodiPloids if workers bias the sex ratio toward females.

Sexual antagonism in haplodiploids

A series of evolutionary-genetic models of sexual antagonism for haplodiploids are developed, incorporating details of their molecular biology and social ecology, and it is found that PGE promotes female-beneficial alleles more than arrhenotoky.

Hybridization enables the fixation of selfish queen genotypes in eusocial colonies

Using mathematical modelling, it is shown that the coevolution of hybridization with caste determination readily triggers an evolutionary arms race between non-hybrid larvae that increasingly develop into queens, and queens that increasingly hybridize to produce workers.

A unified model of Hymenopteran preadaptations that trigger the evolutionary transition to eusociality

It is shown that the joint evolution of helping behaviour and maternal sex ratio adjustment can synergistically trigger both a behavioural change from solitary to eusocial breeding, and a demographic change from a life cycle with two reproductive broods to aLife cycle in which an unmated cohort of female workers precedes a final generation of dispersing reproductives.

Monogamous sperm storage and permanent worker sterility in a long-lived ambrosia beetle

The initially very challenging but ultimately long-term stable nesting habitat in live trees appears to have provided the crucial benefit/cost factor for maintaining selection for permanently sterile workers after strict monogamy and lifetime sperm storage had become established in this curculionid coleopteran lineage.

How to make a sterile helper

An explanation for the extraordinary lifespans of some cooperative species which hint at ways in which the authors can unlock the secrets of long life is offered.



Sex-biased dispersal, haplodiploidy and the evolution of helping in social insects

It is shown that haplodiploids are in fact more favourable than is diploidy to the evolution of reproductive altruism on the part of females, provided only that dispersal is male-biased and no sex-ratio bias or active kin discrimination is required.

Evolution of paternal care in diploid and haplodiploid populations

It is found that haplodiploidy may either inhibit or promote paternal care depending on model assumptions, but that under the most plausible scenarios it promotes – rather than inhibits – paternal care.

Haploidploidy and the evolution of the social insect.

Evidence is presented from 20 species that the ratio of investment in monogynous ants is, indeed, about 1 : 3, and this discovery is subject to a series of tests, which provide quantitative evidence in support of kinship theory, sex ratio theory, and the assumption that the offspring is capable of acting counter to its parents' best interests.

Advanced eusociality, kin selection and male haploidy

It is suggested that sex allocation is deep at the heart of the evolution of hymenopteran advanced eusociality, indicating the interacting roles of population genetics and general biology, and that relatedness is deeply intertwined with ecology so that both are essential.

Haplodiploidy and the Evolution of Facultative Sex Ratios in a Primitively Eusocial Bee

To test the prediction of sex-ratio biasing, relatedness asymmetries were experimentally manipulated in colonies of the primitively eusocial bee Augochlorella striata by removing or not removing foundress queens to produce a more female-biased sex ratio.

Haplodiploidy, Sex-Ratio Adjustment, and Eusociality

Hamilton’s “haplodiploidy hypothesis” holds that inflated sororal relatedness has promoted altruistic sib rearing in haplodiploids, potentially explaining their apparent predisposition to

Monogamy and haplodiploidy act in synergy to promote the evolution of eusociality.

It is shown, using a model that describes the dynamics of insect colony foundation, growth and death, that monogamy and haplodiploidy facilitate the evolution of eusociality in a novel, mutually reinforcing way.