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. 2022 Aug 24;8(34):eabo5115. doi: 10.1126/sciadv.abo5115

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Fig. 1. — (A) PCA of A. artemisiifolia samples. NA populations are defined on the basis of genetic clustering and geography. Dark pink, modern West NA; light pink, historical West NA; dark orange, modern Mideast NA; light orange, historical Mideast NA; dark turquoise, modern South NA; light turquoise, historical South NA; dark blue, modern East NA; light blue, historical East NA; dark gray, modern Europe; light gray, historical Europe. Circles, historical herbarium samples; triangles, contemporary samples. (B) Genetic structure estimated by pairwise F_ST (weighted) between native-range populations and Europe. Populations are split by time period (historical and modern). Shading of the boxes corresponds to the F_ST value, with yellow boxes indicating low F_ST and purple boxes indicating high F_ST.