Convergent subgenome dominance but with lineage-specific functional divergence of homoeologs during cave adaptation: insights from full-length transcriptomes of Sinocyclocheilus species.

ABSTRACT: Allopolyploidy creates duplicated genomes that drives evolutionary innovation and adaptive diversification under extreme environmental pressures. Although subgenomic architecture is recognized as pivotal in post-polyploid evolution, the mechanisms by which divergent subgenome dynamics shape adaptive potential remain unclear. We investigated how subgenome evolution relates to environmental adaptation in Sinocyclocheilus cavefish, an allotetraploid lineage that repeatedly colonized caves across the karst landscapes of Southwest China. We integrated full-length and short-read transcriptomes from a surface-dwelling species (S. angustiporus) and two independently cave-adapted species (S. microphthalmus and S. furcodorsalis). The two cave dweller species showed consistent B-subgenome dominance i

SUBMITTER: Xu S 

PROVIDER: S-EPMC12763860 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature