Homoeolog expression bias and expression level dominance in resynthesized allopolyploid Brassica napus.

ABSTRACT:

Background

Allopolyploids require rapid genetic and epigenetic modifications to reconcile two or more sets of divergent genomes. To better understand the fate of duplicate genes following genomic mergers and doubling during allopolyploid formation, in this study, we explored the global gene expression patterns in resynthesized allotetraploid Brassica napus (AACC) and its diploid parents B. rapa (AA) and B. oleracea (CC) using RNA sequencing of leaf transcriptomes.

Results

We found that allopolyploid B. napus formation was accompanied by extensive changes (approximately one-third of the expressed genes) in the parental gene expression patterns ('transcriptome shock'). Interestingly, the majority (85%) of differentially expressed genes (DEGs) were downregulated in the allotetr

SUBMITTER: Wu J 

PROVIDER: S-EPMC6080508 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature