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Global Invasion History of the Fire Ant Solenopsis invicta
An assessment of genetic variation at a diverse set of molecular markers in 2144 fire ant colonies from 75 geographic sites worldwide revealed that at least nine separate introductions of S. invicta have occurred into newly invaded areas and that the main southern U.S. population is probably the source of all but one of these introductions.
Identification of a Major Gene Regulating Complex Social Behavior
It is shown that single genes of major effect can underlie the expression of complex behaviors important in social evolution, and regulation of social organization by Gp-9 is conserved in South American fire ant species exhibiting social polymorphism.
The Breeding System of the Fire Ant Solenopsis invicta: Effects on Colony Genetic Structure
- K. Ross
- BiologyAmerican Naturalist
- 1 April 1993
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.
Molecular ecology of social behaviour: analyses of breeding systems and genetic structure
- K. Ross
- BiologyMolecular Ecology
- 1 February 2001
A conceptual and mathematical framework that links attributes of the breeding system to group composition and genetic structure is presented here, and recent empirical studies are reviewed in the context of this framework.
The social biology of wasps.
Selfish genes: a green beard in the red fire ant
It is shown that BB queens initiating reproduction are killed by workers, and that it is primarily Bb rather than BB workers that are responsible for these executions.
ECOLOGY AND EVOLUTION OF SOCIAL ORGANIZATION: Insights from Fire Ants and Other Highly Eusocial Insects
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.
Genetic control of social organization in an ant.
Findings reveal how a single genetic factor can have major effects on complex social behavior and influence the nature of social organization in the fire ant Solenopsis invicta.
Kin selection and the problem of sperm utilization in social insects
- K. Ross
- 30 October 1986
This first study of long-term sperm utilization in natural populations of highly social insects shows that queens of two social wasp species use sperm from different males in relatively constant proportions through time, resulting in consistently low relatedness among female nestmates.
Wolbachia infections in native and introduced populations of fire ants (Solenopsis spp.)
- D. D. Shoemaker, K. Ross, L. Keller, E. Vargo, J. Werren
- BiologyInsect molecular biology (Print)
- 1 December 2000
The presence of Wolbachia is reported in native South American populations of the fire ant Solenopsisinvicta, but the apparent absence of the bacteria in introduced populations of this pest species in the USA is reported.