Genome sequence comparison of Col and Ler lines reveals the dynamic nature of Arabidopsis chromosomes.

ABSTRACT: Large differences in plant genome sizes are mainly due to numerous events of insertions or deletions (indels). The balance between these events determines the evolutionary direction of genome changes. To address the question of what phenomena trigger these alterations, we compared the genomic sequences of two Arabidopsis thaliana lines, Columbia (Col) and Landsberg erecta (Ler). Based on the resulting alignments large indels (>100 bp) within these two genomes were analysed. There are approximately 8500 large indels accounting for the differences between the two genomes. The genetic basis of their origin was distinguished as three main categories: unequal recombination (Urec)-derived, illegitimate recombination (Illrec)-derived and transposable elements (TE)-derived. A detailed study of the

SUBMITTER: Ziolkowski PA 

PROVIDER: S-EPMC2691826 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature