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Divergence and Parallelism in Two Tropical Drosophilids Simultaneously Invading a Desert Environment
Ahmed M El-Sabrout1, Céline Moreno2, Mélody Temperville2
1Department of Applied Entomology and Zoology, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria 21545, Egypt.
Genome Biology and Evolution
|July 30, 2025
Summary
Two related invasive fruit fly species, Zaprionus indianus and Zaprionus tuberculatus, show parallel genetic adaptations to arid environments in Egypt. Distinct adaptations in genes related to detoxification and host preference likely facilitate their coexistence.
Area of Science:
- Evolutionary Biology
- Genomics
- Ecology
Background:
- Invasive species present unique evolutionary research opportunities.
- Understanding parallel adaptation and coexistence in coinvading species is crucial.
Purpose of the Study:
- Investigate the genetic basis of adaptation in two Zaprionus fruit fly species invading Egypt.
- Determine how these species coexist in arid agrarian environments.
Main Methods:
- Population genomic analyses of Zaprionus indianus and Zaprionus tuberculatus.
- Comparison of genetic differentiation before and after introduction.
- Assessment of desiccation resistance and fruit preference.
Main Results:
- Both species exhibit correlated genetic differentiation in thermal adaptation and circadian rhythm genes.
- Species-specific gene outliers include chemoreceptor and detoxification genes.
- Egyptian populations show parallel increases in desiccation resistance but distinct fruit preferences.
Conclusions:
- Shared genetic basis for adaptation to arid conditions exists in these invasive species.
- Divergent adaptations in diet and detoxification contribute to their coexistence.
- Findings offer insights into simultaneous invasive success and pest potential.
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