Evolutionary rearrangements of X chromosomes in voles (Arvicolinae, Rodentia)

Sci Rep. 2020 Aug 6;10(1):13235. doi: 10.1038/s41598-020-70226-4.

Abstract

Euchromatic segments of the X chromosomes of placental mammals are the most conservative elements of the karyotype, only rarely subjected to either inter- or intrachromosomal rearrangements. Here, using microdissection-derived set of region-specific probes of Terricola savii we detailed the evolutionary rearrangements found in X chromosomes in 20 vole species (Arvicolinae, Rodentia). We show that the evolution of X chromosomes in this taxon was accompanied by multiple para- and pericentric inversions and centromere shifts. The contribution of intrachromosomal rearrangements to the karyotype evolution of Arvicolinae species was approximately equivalent in both the separate autosomal conserved segments and the X chromosomes. Intrachromosmal rearrangements and structural reorganization of the X chromosomes was likely accompanied by an accumulation, distribution, and evolution of repeated sequences.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Arvicolinae / genetics*
  • Chromosome Inversion
  • Chromosome Painting / veterinary*
  • Evolution, Molecular
  • Microdissection
  • Repetitive Sequences, Nucleic Acid
  • X Chromosome / genetics*