Replaying the evolutionary tape to investigate subgenome dominance in allopolyploid Brassica napus.

ABSTRACT: Allopolyploidisation merges evolutionarily distinct parental genomes (subgenomes) into a single nucleus. A frequent observation is that one subgenome is 'dominant' over the other subgenome, often being more highly expressed. Here, we 'replayed the evolutionary tape' with six isogenic resynthesised Brassica napus allopolyploid lines and investigated subgenome dominance patterns over the first 10 generations postpolyploidisation. We found that the same subgenome was consistently more dominantly expressed in all lines and generations and that >70% of biased gene pairs showed the same dominance patterns across all lines and an in silico hybrid of the parents. Gene network analyses indicated an enrichment for network interactions and several biological functions for the Brassica oleracea subgen

SUBMITTER: Bird KA 

PROVIDER: S-EPMC7986222 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature