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• W2144669198 abstract "Herbivore host specialization includes changes in behavior, driven by locally induced adaptations to specific plants. These adaptations often result in sexual isolation that can be gauged through detection of reduced gene flow between host associated populations. Hypothetically, reduced gene flow can be mediated both by differential response to specific plant kairomones and by the influence of larval diet on some adult traits such as pheromone composition. These hypotheses could serve as a model to explain rapid radiation of phytophagous tephritid fruit flies, a group that includes several complexes of cryptic species. The South American Fruit Fly Anastrepha fraterculus (Wiedemann) is a complex of at least seven cryptic species among which pheromone mediated sexual isolation resulted in rapid differentiation. Cryptic species also exhibit differences in host affiliation. In search of a model explaining rapid radiation in this group, we studied host plant chemical composition and genetic structure of three host associated sympatric populations of A. fraterculus. Chemical composition among host plant fruit varied widely both for nutrient and potentially toxic secondary metabolite content. Adaptation to plant chemistry appears to have produced population differentiation. We found host mediated differentiation to be stronger between populations exploiting sympatric synchronic hosts differing in chemical composition, than between populations that exploit hosts that fruit in succession. Gene flow among such host associated populations was extremely low. We propose as a working hypothesis for future research, that for those differences to persist over time, isolating mechanisms such as male produced sex pheromones and female preferences resulting from adaptation to different larval diets should evolve." @default.
• W2144669198 created "2016-06-24" @default.
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• W2144669198 date "2013-08-01" @default.
• W2144669198 modified "2023-09-26" @default.
• W2144669198 title "Effect of Host Plant Chemistry on Genetic Differentiation and Reduction of Gene Flow Among<i>Anastrepha fraterculus</i>(Diptera: Tephritidae) Populations Exploiting Sympatric, Synchronic Hosts" @default.
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• W2144669198 doi "https://doi.org/10.1603/en13020" @default.
• W2144669198 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23905743" @default.
• W2144669198 hasPublicationYear "2013" @default.
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