Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts
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 ca...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0046225X_v42_n4_p790_Orono http://hdl.handle.net/20.500.12110/paper_0046225X_v42_n4_p790_Orono |
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paper:paper_0046225X_v42_n4_p790_Orono2023-06-08T15:05:28Z Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts Cryptic species complex Gene flow Host mediated differentiation South American fruit fly adaptive radiation biochemical composition crypsis entomology fly fruit gene flow genetic differentiation host plant kairomone phytochemistry plant-herbivore interaction secondary metabolite sex pheromone specialization species complex sympatry pheromone animal Argentina article chemistry female food chain gene flow genetics interspersed repeat physiology polymerase chain reaction Prunus Psidium species differentiation sympatry Tephritidae walnut Animals Argentina Female Food Chain Gene Flow Genetic Speciation Interspersed Repetitive Sequences Juglans Pheromones Polymerase Chain Reaction Prunus Psidium Sympatry Tephritidae 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. © 2013 Entomological Society of America. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0046225X_v42_n4_p790_Orono http://hdl.handle.net/20.500.12110/paper_0046225X_v42_n4_p790_Orono |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cryptic species complex Gene flow Host mediated differentiation South American fruit fly adaptive radiation biochemical composition crypsis entomology fly fruit gene flow genetic differentiation host plant kairomone phytochemistry plant-herbivore interaction secondary metabolite sex pheromone specialization species complex sympatry pheromone animal Argentina article chemistry female food chain gene flow genetics interspersed repeat physiology polymerase chain reaction Prunus Psidium species differentiation sympatry Tephritidae walnut Animals Argentina Female Food Chain Gene Flow Genetic Speciation Interspersed Repetitive Sequences Juglans Pheromones Polymerase Chain Reaction Prunus Psidium Sympatry Tephritidae |
| spellingShingle |
Cryptic species complex Gene flow Host mediated differentiation South American fruit fly adaptive radiation biochemical composition crypsis entomology fly fruit gene flow genetic differentiation host plant kairomone phytochemistry plant-herbivore interaction secondary metabolite sex pheromone specialization species complex sympatry pheromone animal Argentina article chemistry female food chain gene flow genetics interspersed repeat physiology polymerase chain reaction Prunus Psidium species differentiation sympatry Tephritidae walnut Animals Argentina Female Food Chain Gene Flow Genetic Speciation Interspersed Repetitive Sequences Juglans Pheromones Polymerase Chain Reaction Prunus Psidium Sympatry Tephritidae Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts |
| topic_facet |
Cryptic species complex Gene flow Host mediated differentiation South American fruit fly adaptive radiation biochemical composition crypsis entomology fly fruit gene flow genetic differentiation host plant kairomone phytochemistry plant-herbivore interaction secondary metabolite sex pheromone specialization species complex sympatry pheromone animal Argentina article chemistry female food chain gene flow genetics interspersed repeat physiology polymerase chain reaction Prunus Psidium species differentiation sympatry Tephritidae walnut Animals Argentina Female Food Chain Gene Flow Genetic Speciation Interspersed Repetitive Sequences Juglans Pheromones Polymerase Chain Reaction Prunus Psidium Sympatry Tephritidae |
| description |
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. © 2013 Entomological Society of America. |
| title |
Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts |
| title_short |
Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts |
| title_full |
Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts |
| title_fullStr |
Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts |
| title_full_unstemmed |
Effect of host plant chemistry on genetic differentiation and reduction of gene flow among Anastrepha fraterculus (Diptera: Tephritidae) populations exploiting sympatric, synchronic hosts |
| title_sort |
effect of host plant chemistry on genetic differentiation and reduction of gene flow among anastrepha fraterculus (diptera: tephritidae) populations exploiting sympatric, synchronic hosts |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0046225X_v42_n4_p790_Orono http://hdl.handle.net/20.500.12110/paper_0046225X_v42_n4_p790_Orono |
| _version_ |
1768544770830893056 |