Mitochondrial Genome Analysis of <i>Isatis tinctoria</i> L. (Brassicaceae) Reveals Strengthened Purifying Selection Resulting From Recombination-Driven Gene Duplication.

ABSTRACT: Plant mitochondrial genomes exhibit remarkable structural diversity and active recombination, yet their influence on the molecular evolutionary patterns of functional genes requires further empirical evidence across diverse lineages. Here, we assembled and annotated the complete mitochondrial genome of Isatis tinctoria L. (Brassicaceae), a phylogenetically informative species. The circular genome is 260,912 bp in length and contains 65 genes, including a pair of gene duplication events, ccmB and trnK-UUU, situated between large direct repeats. Comparative analysis across 73 mitochondrial genomes-including 71 Brassicaceae accessions and 2 outgroups-revealed that genome size is significantly correlated with SSR abundance. This result supports the "repeat-driven genome ex

SUBMITTER: Li Y 

PROVIDER: S-EPMC12423112 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature