Repeats of Unusual Size in Plant Mitochondrial Genomes: Identification, Incidence and Evolution.

ABSTRACT: Plant mitochondrial genomes have excessive size relative to coding capacity, a low mutation rate in genes and a high rearrangement rate. They also have abundant non-tandem repeats often including pairs of large repeats which cause isomerization of the genome by recombination, and numerous repeats of up to several hundred base pairs that recombine only when the genome is stressed by DNA damaging agents or mutations in DNA repair pathway genes. Early work on mitochondrial genomes led to the suggestion that repeats in the size range from several hundred to a few thousand base pair are underrepresented. The repeats themselves are not well-conserved between species, and are not always annotated in mitochondrial sequence assemblies. We systematically identified and compared these repeats, which

SUBMITTER: Wynn EL 

PROVIDER: S-EPMC6385970 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature