The impact of range expansions on genomic parasitism in Lepidoptera

摘要：本项目将研究鳞翅目基因组寄生的动态变化。以前的研究表明鳞翅目的基因组入侵率特别高，但没有对最近的水平转移进行系统的研究。该项目将受益于一个独特的资源——一个庞大的种群基因组数据集，比较了来自20种鳞翅目物种的100年前和现在的样本。利用这些数据，我们将：-表征这些鳞翅目物种的转座元素含量-测试范围移动是否触发转座元素活性，对比有范围移动和没有范围移动的物种-检查每个物种是否有新的转座元素入侵的证据-收集和分析来自物种子集的新序列数据，以调查过去与转座元素相遇的影响

Summary: In this project, we will investigate the dynamics of recent genomic parasitism in Lepidoptera. Previous work suggests that Lepidoptera show especially high rates of genomic invasions, but no systematic study of recent horizontal transfer has been attempted. The project will benefit from a unique resource-- a large population genomic data set comparing ~100-year-old and present-day samples from 20 Lepidopteran species. Using these data, we will:-Characterise the transposable element content of these Lepidopteran species-Test whether range shifts trigger transposable element activity, contrasting species with and without range shifts-Examine each species for evidence of invasions of new transposable elements-Collect and analyse new sequence data from a subset of the species, to investigate the impact of past encounters with transposable elements