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Allopatric genetic origins for sympatric host-plant shifts and race formation in Rhagoletis
TLDR
Evidence is reported suggesting a surprising source of genetic variation contributing to sympatric host shifts forephritid fruit flies belonging to the Rhagoletis pomonella sibling species complex, which originated in a different time and place than the proximate ecological host shifts triggering sympatrics divergence. Expand
Evidence for inversion polymorphism related to sympatric host race formation in the apple maggot fly, Rhagoletis pomonella.
TLDR
Substantial gametic disequilibrium is found among allozyme and complementary DNA markers encompassing the three chromosomal regions differentiating apple and hawthorn flies, suggesting that genes affecting diapause traits involved in host race formation reside within large complexes of rearranged genes. Expand
Natural selection and sympatric divergence in the apple maggot Rhagoletis pomonella
TLDR
A gene–environment interaction (fitness trade-off) that is related to host phenology and that genetically differentiates the races is documented. Expand
THE EFFECTS OF WINTER LENGTH ON THE GENETICS OF APPLE AND HAWTHORN RACES OF RHAGOLETIS POMONELLA (DIPTERA: TEPHRITIDAE)
TLDR
The second in a series of studies testing for host‐related selection on pupal life‐history characteristics of apple and hawthorn infesting races of the Tephritid fruit fly, Rhagoletis pomonella, examines the effects of winter length on the genetics of these flies. Expand
Selective maintenance of allozyme differences among sympatric host races of the apple maggot fly.
TLDR
The findings confirm that postzygotic reproductive isolation can evolve as a pleiotropic consequence of host-associated adaptation, a central tenet of nonallopatric speciation and suggest that one reason for the paucity of reported fitness trade-offs is a failure to consider adequately costs associated with coordinating an insect's life cycle with the phenology of its host plant. Expand
A FIELD TEST FOR HOST‐PLANT DEPENDENT SELECTION ON LARVAE OF THE APPLE MAGGOT FLY, RHAGOLETIS POMONELLA
Host‐plant dependent fitness trade‐offs refer to traits that enhance the performance of an insect on one plant species to its detriment on others. Such trade‐offs are central to models of sympatricExpand
Effects of Photoperiod and Light Intensity on the Genetics of Diapause in the Apple Maggot (Diptera: Tephritidae)
TLDR
It is reported that variation in photoperiod, but not light intensity, during the larval stage affects adult eclosion, and daylength is probably of secondary importance relative to temperature and season length in genetically differentiating the host races. Expand
Evidence for Broad-Scale Conservation of Linkage Map Relationships Between Rhagoletis pomonella (Diptera: Tephritidae) and Drosophila melanogaster (Diptera: Drosophilidae)
TLDR
Evidence for broad-scale synteny between Drosophila and Rhagoletis suggests that a comparative genomics approach could be useful for addressing a number of basic and applied issues in Diptera, including speciation, systematics and biocontrol. Expand
Toward a Molecular Genetic Linkage Map for the Apple Maggot Fly (Diptera: Tephritidae): Comparison of Alternative Strategies
TLDR
The development of a molecular genetic linkage map for the fly is reported on and the relative merits of alternative strategies that were used to build the map are evaluated. Expand
Two attacin antibacterial genes of Drosophila melanogaster.
TLDR
The cloning of two closely linked attacin genes from Drosophila melanogaster are reported and the amino acid sequences are found to be more highly conserved than the nucleotide sequences, suggesting that both genes are expressed. Expand
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