Conversion between 100-million-year-old duplicated genes contributes to rice subspecies divergence.

ABSTRACT:

Background

Duplicated gene pairs produced by ancient polyploidy maintain high sequence similarity over a long period of time and may result from illegitimate recombination between homeologous chromosomes. The genomes of Asian cultivated rice Oryza sativa ssp. indica (XI) and Oryza sativa ssp. japonica (GJ) have recently been updated, providing new opportunities for investigating ongoing gene conversion events and their impact on genome evolution.

Results

Using comparative genomics and phylogenetic analyses, we evaluated gene conversion rates between duplicated genes produced by polyploidization 100 million years ago (mya) in GJ and XI. At least 5.19-5.77% of genes duplicated across the three rice genomes were affected by whole-gene conversion after the divergence of GJ and X

SUBMITTER: Wei C 

PROVIDER: S-EPMC8214281 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature