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Plant Systematics and Evolution

, Volume 192, Issue 3–4, pp 165–176 | Cite as

Comparison of the Giemsa C-banded and N-banded karyotypes of twoElymus species,E. dentatus andE. glaucescens (Poaceae: Triticeae)

  • Ib Linde-Laursen
  • Ole Seberg
  • Björn Salomon
Article

Abstract

The karyotypes ofElymus dentatus from Kashmir andE. glaucescens from Tierra del Fuego, both carrying genomesS andH, were investigated by C- and N-banding. Both taxa had 2n = 4x = 28. The karyotype ofE. dentatus was symmetrical with large chromosomes. It had 18 metacentric, four submetacentric and six satellited chromosomes. The karyotype ofE. glaucescens resembled that ofE. dentatus, but a satellited chromosome pair was replaced by a morphologically similar, non-satellited pair. The C-banding patterns of both species had from one to five conspicuous and a few inconspicuous bands per chromosome. N-banding differentiated the chromosomes of the constituent genomes by producing bands in theH genome only. TheS genomes of both species were similar with five metacentric and two satellited chromosomes having most conspicuous C-bands at telomeric and distal positions. They resembled theS genome of the genusPseudoroegneria. TheH genomes had four similar metacentric and two submetacentric chromosomes. The seventhH genome chromosome ofE. dentatus was satellited, that ofE. glaucescens nonsatellited, but otherwise morphologically similar. The C-bands were distributed at no preferential positions. TheH genome ofE. dentatus resembles theH genomes of some diploidHordeum taxa.

Key words

Poaceae Triticeae Elymus dentatus E. glaucescens Karyotype Giemsa C-banding N-banding genome differentiation 

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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • Ib Linde-Laursen
    • 1
  • Ole Seberg
    • 2
  • Björn Salomon
    • 3
  1. 1.Plant Genetics Section, Department of Environmental Science and TechnologyRisø National LaboratoryRoskildeDenmark
  2. 2.Botanical Institute, Botanical LaboratoryUniversity of CopenhagenCopenhagen KDenmark
  3. 3.Department of Plant Breeding ResearchThe Swedish University of Agricultural SciencesSvalövSweden

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