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- W4296157631 abstract "Abstract Biological introductions are unintended “natural experiments” that provide unique insights into evolutionary processes. Invasive phytophagous insects are of particular interest to evolutionary biologists studying adaptation, as introductions often require rapid adaptation to novel host plants. However, adaptive potential of invasive populations may be limited by reduced genetic diversity—a problem known as the “genetic paradox of invasions”. One potential solution to this paradox is if there are multiple invasive waves that bolster genetic variation in invasive populations. Evaluating this hypothesis requires characterizing genetic variation and population structure in the introduced range. To this end, we assemble a reference genome and describe patterns of genetic variation in the introduced white pine sawfly, Diprion similis . This species was introduced to North America in 1914, where it has undergone a rapid host shift to the thin-needled eastern white pine ( Pinus strobus ), making it an ideal invasion system for studying adaptation to novel environments. To evaluate evidence of multiple introductions, we generated whole-genome resequencing data for 64 D. similis females sampled across the North American range. Both model-based and model-free clustering analyses supported a single population for North American D. similis . Within this population, we found evidence of isolation-by-distance and a pattern of declining heterozygosity with distance from the hypothesized introduction site. Together, these results support a single-introduction event. We consider implications of these findings for the genetic paradox of invasion and discuss priorities for future research in D. similis , a promising model system for invasion biology." @default.
- W4296157631 created "2022-09-18" @default.
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- W4296157631 date "2022-09-17" @default.
- W4296157631 modified "2023-09-26" @default.
- W4296157631 title "Whole-genome resequencing data support a single introduction of the invasive white pine sawfly, <i>Diprion similis</i>" @default.
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- W4296157631 doi "https://doi.org/10.1101/2022.09.14.507957" @default.
- W4296157631 hasPublicationYear "2022" @default.
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