Corpus ID: 18012962

Multilocus evolution in fire ants: effects of selection, gene flow and recombination.

@article{Ross1997MultilocusEI,
  title={Multilocus evolution in fire ants: effects of selection, gene flow and recombination.},
  author={Kenneth G. Ross},
  journal={Genetics},
  year={1997},
  volume={145 4},
  pages={
          961-74
        }
}
  • K. Ross
  • Published 1 April 1997
  • Biology, Medicine
  • Genetics
The reproductive success of individual fire ant queens (Solenopsis invicta) previously has been shown to be strongly influenced by their genotype at a single enzyme-encoding gene, designated Pgm-3. This paper presents evidence that a second, tightly linked gene, designated Gp-9, is under similarly strong selection in these ants. Selection appears to act independently on the two genes and is detectable in only one of the two social forms of this species (the "polygyne" social form in which nests… Expand
A FORMAL ASSESSMENT OF GENE FLOW AND SELECTION IN THE FIRE ANT SOLENOPSIS INVICTA
TLDR
A novel mathematical model is constructed and analyzed to delimit the effects of monogyne male gene flow and selection on the joint genotypes at the Pgm‐3/Gp‐9 superlocus and found that selection on polygyne queens and workers alone provides the most parsimonious explanation for the observed genotype frequencies. Expand
Potential cause of lethality of an allele implicated in social evolution in fire ants
TLDR
Data are consistent with the hypothesis that the Lys151 residue in GP-9 protein confers the deleterious effects of the b allele in homozygous condition, possibly by impairing the protein’s function through interference with ligand binding/release or hindrance of dimer formation. Expand
Male reproductive fitness and queen polyandry are linked to variation in the supergene Gp-9 in the fire ant Solenopsis invicta
TLDR
It is shown that both male reproductive success and facultative polyandry in queens have a simple genetic basis and are dependent on male Gp-9 genotype, and how strong worker-induced selection acting to maintain the G p-9b allele in the polygyne social form may simultaneously result in reduced reproductive fitness for individual sexual offspring. Expand
Selective Male Mortality in the Red Imported Fire Ant, Solenopsis invicta
TLDR
The bb genotype, rather than an obligate, developmental lethal, was present in some queens and common in alates, workers, and brood, suggesting some frequency of multiple mating in polygyne populations of Solenopsis invicta. Expand
Molecular Variation at a Candidate Gene Implicated in the Regulation of Fire Ant Social Behavior
TLDR
No single b-like residue is completely predictive of polygyne behavior and, thus, potentially causally involved in its expression, so naturally occurring variation at Gp-9 in fire ants is described, and several unique alleles bearing various combinations of b- like and B-like codons are found. Expand
MOLECULAR BASIS OF LETHALITY OF AN ALLELE IMPLICATED IN SOCIAL EVOLUTION IN FIRE ANTS
Gp-9 has a major effect on social organization in fire ants. Queens and workers of polygyne Solenopsis invicta homozygous for the b-like allele b suffer reduced viability, and bb queens neverExpand
Simple inheritance, complex regulation: Supergene‐mediated fire ant queen polymorphism
TLDR
The distinctive supergene‐associated gene expression trajectories recorded at the onset of a queen’s reproductive life expand the known record of relevant molecular correlates of a complex social polymorphism and point to putative genetic factors underpinning the alternate social syndromes. Expand
GENETIC REGULATION OF COLONY SOCIAL ORGANIZATION IN FIRE ANTS: AN INTEGRATIVE OVERVIEW
TLDR
Information that reveals the links between molecular variation, individual phenotype, and colony‐level behaviors, combined with behavioral models that incorporate details of the chemical communication involved in regulating queen number, will yield a novel integrated view of the evolutionary changes underlying a key social adaptation. Expand
Frequency and origin of triploidy in the fire ant Solenopsis invicta
TLDR
The results suggest that triploid females of social Hymenoptera may be more common than appreciated and are most likely to be found in populations with substantial numbers of fertile diploid males. Expand
Evidence of Selective Mating and Triploidy Among Two Social Forms of Solenopsis invicta (Hymenoptera: Formicidae)
TLDR
This study examined the genotypes of queens and their stored sperm during a mating flight in Florida where polygyne colonies predominate, and provides evidence of non-random mating. Expand
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References

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Joint Influence of Gene Flow and Selection on a Reproductively Important Genetic Polymorphism in the Fire Ant Solenopsis invicta
We present evidence that gene flow counteracts directional selection to maintain a high level of polymorphism at Pgm-3, a gene known to have a major effect on reproduction in the population ofExpand
SIMPLE GENETIC BASIS FOR IMPORTANT SOCIAL TRAITS IN THE FIRE ANT SOLENOPSIS INVICTA
TLDR
Patterns establish that a single mendelian gene influences queen reproductive role in S. invicta and that this gene uniformly is under strong directional selection in the polygyne social form only. Expand
The Breeding System of the Fire Ant Solenopsis invicta: Effects on Colony Genetic Structure
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TLDR
Significant differences within nests in the matrilineal composition of worker and queen brood are revealed, constituting further evidence for inequities among nest-mate queens in the allocation of their progeny to the two castes at a single point in time. Expand
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TLDR
There is a counterintuitive relation between the potential and realized reproductive success of queens in multiple-queen societies of this ant, which is an unusual example of genotype-environment interaction in gene expression in which the environmental component is the social environment. Expand
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TLDR
It is concluded that diploid males have increased in frequency in introduced populations because of a loss of allelic diversity at the sex-determining locus (loci) of S. invicta, which has generated a substantial increase in the estimated segregational genetic load associated with production of sterile diploids males in introducing populations over the load in native populations. Expand
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TLDR
The existence of a single mendelian factor that strongly influences success in reproductive competition in multiple-queen societies of an ant is reported and a mechanism by which variation is maintained at this gene despite the presence of strong directional selection is proposed. Expand
ECOLOGY AND EVOLUTION OF SOCIAL ORGANIZATION: Insights from Fire Ants and Other Highly Eusocial Insects
TLDR
Evolution of social organization can be important in generating intrinsic selective regimes that channel subsequent social evolution and in initiating the development of significant population genetic structure, including barriers to gene flow important in cladogenesis. Expand
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TLDR
The level of genetic differentiation among partially isolated subpopulations will, in the absence of selection (and ignoring mutation), depend on effective sizes of demes and the migration rates between them. Expand
Estimates of heterozygosity in two social insects using a large number of electrophoretic markers
An extensive electrophoretic survey of enzyme and protein markers was conducted for a haplodiploid eusocial insect, the red imported fire ant (Solenopsis invicta), and for a diploid communal insect,Expand
Social evolution in a new environment: the case of introduced fire ants.
  • K. Ross, E. Vargo, L. Keller
  • Biology, Medicine
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TLDR
It is reported that several important elements of social organization in multiple-queen nests differ consistently and dramatically between ants in Argentina and the United States. Expand
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