Conservation of a dinucleotide simple sequence repeat locus in sharks

A. P. Martin, A. T. Pardini, Leslie Robert Noble, Catherine Sue Jones

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Recent studies indicate that the flanking region and repeat motif structure of conserved microsatellite loci are useful for phylogenetic inference. Most comparative studies of microsatellite loci involve relatively closely related species, however, primarily because primers developed for one species often amplify only related species. We describe an analysis of a microsatellite locus in lamniform sharks that we estimate has been conserved for a billion years. Combined analysis of the flanking sequence and repeat motif structure resulted in a gene tree comparable to those reported from similar analyses of other genes. The conservation of the simple sequence repeat (SSR), and of the sequence flanking the SSR, is explained by a low substitution rate in sharks coupled with the possibility that mutations which interrupt perfect repeats are lost by replication slippage. (C) 2002 Elsevier Science (USA). All rights reserved.

Original languageEnglish
Pages (from-to)205-213
Number of pages8
JournalMolecular Phylogenetics and Evolution
Volume23
Issue number2
DOIs
Publication statusPublished - May 2002

Keywords

  • MICROSATELLITE LOCI
  • PHYLOGENETIC ANALYSIS
  • MULTILOCUS PHYLOGENY
  • ELASMOBRANCH FISHES
  • LAMNIFORM SHARKS
  • DNA
  • EVOLUTION
  • SUBSTITUTION
  • POPULATIONS
  • MORPHOLOGY

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