Subgenome Dominance in Allotetraploid Actinidia valvata Regulates RNA m⁶A Modification for Waterlogging Tolerance.

ABSTRACT: Polyploidization is a major driving force for evolutionary innovation and environmental adaptation in plants and is notably prevalent in kiwifruits. However, the molecular mechanisms through which subgenome interactions influence vigor and stress resilience remain largely unclear. Here, the high-quality genome of the tetraploid kiwifruit Actinidia valvata, which exhibits strong waterlogging tolerance compared to cultivated varieties is reported. The analysis reveals that the polyploid genome is of hybrid origin and exhibits subgenome dominance. The enhanced gene expression in the dominant subgenome is accompanied by fewer transposable elements, lower DNA methylation levels, increased chromatin accessibility, and biased global RNA m⁶A methylation abundance and distribution. It is

SUBMITTER: Hu X 

PROVIDER: S-EPMC12407272 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature