Chloroplast DNA and isozyme analysis of the progenitor-derivative species relationship between Senecio nebrodensis L. and S. viscosus L.

JW Kadereit, HP Comes, DJ Curnow, JA Irwin, Richard John Abbott

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

A comparison of chloroplast DNA (cpDNA) and isozyme diversity in Senecio nebrodensis L., a species restricted to certain mountain ranges in Spain, and S. viscosus L., a widespread ruderal species in Europe, revealed that S. viscosus possessed the more common of two cpDNA haplotypes resolved in S. nebrodensis and contained only a small subset of the alleles found in S. nebrodensis at enzyme coding loci. The two species shared one restriction length mutation and one site mutation in their cpDNA, which distinguished them from other European Senecio species examined previously. Taken overall, these results support the hypothesis that S. nebrodensis and S. viscosus are related as a progenitor-derivative pair of species. The fact that no novel alleles were found in S. viscosus would suggest a relatively recent origin of the species, most probably in late glacial or postglacial times.

Original languageEnglish
Pages (from-to)1179-1185
Number of pages7
JournalAmerican Journal of Botany
Volume82
Publication statusPublished - Sept 1995

Keywords

  • ALLOZYME VARIATION
  • GENETIC DIVERSITY
  • ORIGIN
  • COMPOSITAE
  • HISTORY
  • PAIR

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