Discrepancy variation of dinucleotide microsatellite repeats in eukaryotic genomes

• HUAN GAO ^[1] ; SHENGLI CAI ^[2] ; BINLUN YAN ^[1] ; BAIYAO CHEN ^[3] ; FEI YU ^[3]
  1. [1] Huaihai Institute of Technology

     Huaihai Institute of Technology

     China

     
  2. [2] Shanghai Ocean University

     Shanghai Ocean University

     China

     
  3. [3] Marine Fisheries Research Institute of Lianyungang

  Mostrar afiliaciones +
• Localización: Biological Research, ISSN-e 0717-6287, ISSN 0716-9760, Vol. 42, Nº. 3, 2009, págs. 365-375
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • To address whether there are differences of variation among repeat motif types and among taxonomic groups, we present here an analysis of variation and correlation of dinucleotide microsatellite repeats in eukaryotic genomes. Ten taxonomic groups were compared, those being primates, mammalia (excluding primates and rodentia), rodentia, birds, fish, amphibians and reptiles, insects, molluscs, plants and fungi, respectively. The data used in the analysis is from the literature published in the Journal of Molecular Ecology Notes. Analysis of variation reveals that there are no significant differences between AC and AG repeat motif types. Moreover, the number of alleles correlates positively with the copy number in both AG and AC repeats. Similar conclusions can be obtained from each taxonomic group. These results strongly suggest that the increase of SSR variation is almost linear with the increase of the copy number of each repeat motif. As well, the results suggest that the variability of SSR in the genomes of low-ranking species seem to be more than that of high-ranking species, excluding primates and fungi.