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.