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Topographic fragmentation shapes maternal lineage divergence and plastome variation in the seed dispersal limited alpine herb Rhodiola bupleuroides
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DOI：10.1016/j.pld.2026.06.006.png)
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Abstract
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• 468 plastomes of the alpine herb Rhodiola bupleuroides reveal four deep QXP maternal lineages. • Intraspecific divergence in this seed-limited species initiated during the Pliocene. • Topographic isolation primarily restricts seed-mediated gene flow and shapes plastome structure. • The Hengduan lineage retains high chloroplast DNA diversity and enriched complex SSR motifs. • The southwestern plateau lineage exhibits stronger codon usage bias and lower diversity.
Keywords:
Rhodiola bupleuroides
Population plastomics
Seed dispersal limitation
Maternal lineage divergence
Topographic barriers
Qinghai–Xizang Plateau
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