Chromosome-level assembly and analysis of three hydroxy fatty acid-producing Physaria species.

ABSTRACT: Several Physaria species (Brassicaceae) produce abundant hydroxy fatty acids in their seeds, with industrial applications. Here, we report three chromosome-level genomes of Physaria species: P. lindheimeri, P. pallida and P. fendleri, with sizes of 344 Mb, 329 Mb and 452 Mb, respectively. Comparative genome analysis reveals that these three Physaria species diverged from Arabidopsis thaliana approximately 14.10-14.46 million years ago and underwent two consecutive Physaria-specific whole-genome duplication events. Their centromeres harbor an 111-bp satellite repeat and two retrotransposon classes (Gypsy/CRM, Copia/Ale). Transcriptomic analysis identifies seed-highly expressed lipid synthesis genes potentially underlying unique fatty acid profiles. Furthermore, we pinpoint the two residues

SUBMITTER: Wang S 

PROVIDER: S-EPMC12749981 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature