Comparative cytogenetic analysis of hexaploid Avena L. species

  • E. D. Badaeva
  • O. Yu. Shelukhina
  • O. S. Dedkova
  • I. G. Loskutov
  • V. A. Pukhalskyi
Plant Genetics


Using C-banding method and in situ hybridizatiion with the 45S and 5S rRNA gene probes, six hexaploid species of the genus Avena L. with the ACD genome constitution were studied to reveal evolutionary karyotypic changes. Similarity in the C-banding patterns of chromosomal patterns and in the patterns of distribution of the rRNA gene families suggests a common origin of all hexaploid species. Avena fatua is characterized by the broadest intraspecific variation of the karyotype; this species displays chromosomal variants typical of other hexaploid species of Avena. For instance, a translocation with the involvement of chromosome 5C marking A. occidentalis was discovered in many A. fatua accessions, whereas in other representatives of this species this chromosome is highly similar to the chromosome of A. sterilis. Only A. fatua and A. sativa show slight changes in the morphology and in the C-banding pattern of patterns of chromosome 2C. These results can be explained either by a hybrid origin of A. fatua or by the fact that this species is an intermediate evolutionary form of hexaploid oats. The 7C–17 translocation was identified in all studied accessions of wild and weedy species (A. sterilis, A. fatua, A. ludoviciana, and A. occidentalis) and in most A. sativa cultivars, but it was absent in A. byzantina and in two accessions of A. sativa. The origin and evolution of the Avena hexaploid species are discussed in context of the results.


Genome Chromosome Hexaploid Species Avena Fatua Avena Species Intergenomic Translocation 
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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • E. D. Badaeva
    • 1
    • 2
  • O. Yu. Shelukhina
    • 1
  • O. S. Dedkova
    • 1
  • I. G. Loskutov
    • 3
  • V. A. Pukhalskyi
    • 1
  1. 1.Vavilov Institute of General GeneticsRussian Academy of SciencesMoscowRussia
  2. 2.Engelhardt Institute of Molecular BiologyRussian Academy of SciencesMoscowRussia
  3. 3.Vavilov Institute of Plant IndustryRussian Academy of Agricultural SciencesSt. PetersburgRussia

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