Revisiting ancient whole-genome duplications in the seed and flowering plants through the lens of dosage-sensitive genes.

ABSTRACT: Whole-genome duplication (WGD) has been proposed as a catalyst for evolutionary innovation in seed plants and angiosperms, yet their occurrence remains contentious. By integrating gene dosage balance principles with phylogenomic reconciliation and probabilistic modeling, we revisit the debated ancestral seed and angiosperm WGDs. Leveraging dosage-sensitive orthologous gene groups (OGs) as evolutionary markers across representative plants for gene tree/species tree reconciliation, we demonstrate that gene retention patterns in Amborella and Aristolochia-early-diverging plants lacking post-angiosperm origin WGDs-reveal a single gene duplication peak predating the seed plant diversification, with no signal of ancestral angiosperm WGD. Correlation analyses of observed and expecte

SUBMITTER: Shi T 

PROVIDER: S-EPMC12758537 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature