Large-scale analysis reveals that the genome features of simple sequence repeats are generally conserved at the family level in insects.

ABSTRACT:

Background

Simple sequence repeats (SSR), also called microsatellites, have been widely used as genetic markers, and have been extensively studied in some model insects. At present, the genomes of more than 100 insect species are available. However, the features of SSRs in most insect genomes remain largely unknown.

Results

We identified 15.01 million SSRs across 136 insect genomes. The number of identified SSRs was positively associated with genome size in insects, but the frequency and density per megabase of genomes were not. Most insect SSRs (56.2-93.1%) were perfect (no mismatch). Imperfect (at least one mismatch) SSRs (average length 22-73 bp) were longer than perfect SSRs (16-30 bp). The most abundant insect SSRs were the di- and trinucleotide types, which accounted f

SUBMITTER: Ding S 

PROVIDER: S-EPMC5674736 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature