Convergent Patterns of Karyotype Evolution Underlying Karyotype Uniformity in Conifers.

ABSTRACT: Karyotype diversity plays an important role in speciation and diversification. However, gymnosperms, particularly conifers, exhibit remarkable karyotype uniformity. To explore the evolutionary processes shaping karyotypes in gymnosperms, the karyotype evolutionary history is reconstructed through comparative genomic analyses. Synteny analysis confirms the absence of ancient polyploidy in conifers and its rarity across the gymnosperms as a whole. Further analysis reveals convergent patterns of reciprocal translocations between nonhomologous chromosomes in conifer genomes. Centromeric-centromeric reciprocal translocations (CRTs) have been identified as the primary mechanism of karyotype evolution in conifers, while telomeric-centromeric reciprocal translocations (TRTs) significantly contribu

SUBMITTER: Zhang RG 

PROVIDER: S-EPMC11831501 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature