Interspecific evolution in plant microsatellite structure

Marianne Barrier, Elizabeth Friar, Robert Robichaux, Michael Purugganan

Research output: Contribution to journalArticlepeer-review


Several intragenically linked microsatellites have been identified in the floral regulatory genes A. sandwicense APETALA1 (ASAP1) and A. sandwicense APETALA3/TM6 (ASAP3/TM6) in 17 species of the Hawaiian and North American Madiinae (Asteraceae). Thirty-nine microsatellite loci were observed in the introns of these two genes, suggesting that they are hotspots for microsatellite formation. The sequences of four of these microsatellites were mapped onto the phylogenies of these floral regulatory genes, and the structural evolution of these repeat loci was traced. Both nucleotide substitutions and insertion/deletion mutations may be responsible for the formation of perfect microsatellites from imperfect repeat regions (and vice versa). (C) 2000 Published by Elsevier Science B.V. All rights reserved.

Original languageEnglish (US)
Pages (from-to)101-105
Number of pages5
Issue number1
StatePublished - Jan 4 2000


  • Adaptive radiation
  • Floral regulatory genes
  • Hawaiian silversword alliance
  • Imperfect microsatellites
  • Simple sequence repeats

ASJC Scopus subject areas

  • Genetics


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