Transposable elements drive evolution and perturb gene expression in Brassica rapa and B. oleracea.

ABSTRACT: Transposable elements (TEs) significantly influence genomic diversity and gene regulation in plants. Brassica rapa and B. oleracea, with their distinct domestication histories, offer excellent models to explore TE dynamics. Here, we developed a refined TE classification method and systematically analyzed TEs across 12 B. rapa and B. oleracea genomes, identifying 1878 TE families. Approximately half (49.5%) of these TE families were shared between the two species, reflecting a common evolutionary origin, whereas species-specific expansions, particularly among long-terminal repeat (LTR) retrotransposons, underscore their roles in genomic differentiation. We notably characterized a heat-responsive Ty1-copia family (Copia0035) in B. oleracea roots, distinguished by low GC content and the absen

SUBMITTER: Zheng PX 

PROVIDER: S-EPMC12401559 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature