ArticleFrontiers in plant science2026
Population genomics reveals genetic structure and dispersal sources of the invasive herb
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: The invasion of Methods: We integrated population genomics and invasion history by analyzing genome-wide single nucleotide polymorphisms (SNPs) from 261 individuals across 30 populations. Populations were categorized as early-invaded (long-established), mid-invaded (moderately recent), or newly invaded based on county-level invasion records. Phylogenetic relationships, population structure, gene flow patterns, and dispersal networks were reconstructed using phylogenetic, clustering, and gene flow analyses to trace evolutionary relationships and potential dispersal routes. Results: Phylogenetic analysis resolved seven major monophyletic groups (A-G), while population structure analysis inferred seven ancestral gene pools (P1-P7), with strong concordance between the two independent datasets. Early-invaded populations exhibited clear spatial genetic differentiation. In contrast, newly invaded populations showed genetic admixture with ancestries overlapping multiple gene pools, indicating multiple origins and supporting a mixed dispersal pattern involving both local spread and long-distance jump dispersal. Specifically, new invasions in the Xilin Gol (XL) grassland were traced to agricultural regions in Zhangjiakou (ZJ) and Chifeng (CF). Gene flow and network analyses identified these early-invaded agricultural regions as key dispersal hubs supplying migrants to newly invaded areas. Source populations exhibited higher genetic diversity ( Discussion: These findings confirm the hypothesis of asymmetric, human-mediated jump dispersal and clarify the invasion genetic architecture of
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