Host-associated genetic differentiation and origin of a recent host shift in the generalist parasitic weed Phelipanche ramosa

The branched broomrape, <em>Phelipanche ramosa</em> (L.) Pomel, is a parasitic weed that can infest several crops, notably tobacco, hemp and tomato. In western France, it has recently adapted to a new host, oilseed rape. We collected <em>P. ramosa</em> samples from fields cultivated with six different crops across Europe. Data from SSR markers and DNA sequences showed strong host-associated genetic differentiation. File SSRdata-Pramosa1611.txt contains sampling locations, host crops and microsatellite genotypes. Files BO1aligned.fas, ITSaligned.fas, RPL16aligned.fas and trnKtrnQaligned.fas contain aligned DNA sequences.分枝列当（*Phelipanche ramosa* (L.) Pomel）是一类可侵染多种作物的寄生性杂草，寄主涵盖烟草、大麻与番茄等。在法国西部，该物种近期已适应了新的寄主作物——油菜。研究团队从欧洲范围内种植六种不同作物的田块中采集了分枝列当样本。基于简单序列重复（SSR，Simple Sequence Repeat）标记与DNA序列的数据，分析结果显示该物种存在显著的寄主相关遗传分化。文件SSRdata-Pramosa1611.txt包含采样位点、寄主作物信息以及微卫星基因型数据。文件BO1aligned.fas、ITSaligned.fas、RPL16aligned.fas及trnKtrnQaligned.fas均包含经比对的DNA序列。