Dynamic Genetic Changes Reveal: Intra-Lineage Diversity, Not Admixture, Explains <i>Amaranthus palmeri</i>'s Success in China.

ABSTRACT: Global trade facilitates multiple introductions of alien species, yet the role of genetic admixture between divergent lineages in driving invasion success remains debated. Here, we address this question by analyzing dynamic genetic changes across invasion stages in the dioecious weed Amaranthus palmeri, introduced to China from North and South America. Combining chloroplast phylogeography with nuclear genetic analyses, we systematically investigated genetic changes in populations at casual, naturalized, invasive, and dispersal stages. Initial casual populations originated from distinct North and South American lineages, but all established populations (naturalized, invasive, dispersal) retained only North American haplotypes. South American genetic introgression decreased progressiv

SUBMITTER: Cao JJ 

PROVIDER: S-EPMC12427824 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature