Temporal decline of genetic differentiation among populations of western flower thrips across an invaded range

文献类型： 外文期刊

第一作者： Sun, Li-Na

作者： Sun, Li-Na;Cao, Li-Jun;Chen, Jin-Cui;Ma, Li-Jun;Wei, Shu-Jun;Sun, Li-Na;Wu, San-An;Zhang, Gui-Fen;Hoffmann, Ary Anthony;Hoffmann, Ary Anthony

作者机构：

关键词： Frankliniella occidentalis; Alien invasive species; Population genetics; Genetic admixture; Temporal variation

期刊名称：BIOLOGICAL INVASIONS （ 影响因子：2.9； 五年影响因子：3.1 ）

ISSN： 1387-3547

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Colonizing populations of alien invasive species are often unstable due to their small population size, ongoing gene flow, and ongoing adaptation to local conditions. These processes should lead to molecular signatures at the population level. However, temporal changes in genetic patterns after introduction are rarely examined. The western flower thrips, Frankliniella occidentalis (Pergande), is a globally invasive pest of vegetables and ornamental crops. Populations collected early in the invasion of China by this pest exhibited a strong population structure reflecting different invasion sources. Here, we re-examine this pattern after ten years. Over this period, genetic diversity has increased significantly, and the strong population genetic structure found in early sampling has declined. Gene flow between both geographically close and distant populations was identified. The loss of population structure likely reflects ongoing gene flow after colonization. Our results emphasize the importance of continuing to manage gene flow among invaded areas to limit the exchange of alleles that might facilitate further adaptive changes following a pest invasion.

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