Theoretical and Applied Genetics

, Volume 64, Issue 1, pp 31–40 | Cite as

Comparison of the chromosomes of Triticum timopheevi with related wheats using the techniques of C-banding and in situ hybridization

  • J. Hutchinson
  • T. E. Miller
  • J. Jahier
  • K. W. Shepherd
Article

Summary

The chromosomes of the tetraploid wheats Triticum timopheevi (Genome AAGG) and T. araraticum (Genome AAGG) were C-banded at mitosis. The identity of the banded and unbanded chromosomes was then established by firstly making comparisons with the hexaploid species T. zhukovskyi which has the genome formula AAAAGG. Secondly, the meiotic pairing in F1 hybrids between T. timopheevi and diploid wheats was examined by means of C-banding. The results showed that the banded chromosomes belonged to the G genome, while the unbanded chromosomes belonged to the A genome. Only one of the two pairs of satellited chromosomes had strong heterochromatic bands. The relationship between the genomes of T. timopheevi and T. dicoccum (Genome AABB) was then assessed at meiosis in hybrids between these species, using the techniques of C-banding and in situ hybridisation of a cloned ribosomal RNA gene probe. It was concluded that there were differences both in the amount and distribution of heterochromatin and also translocation differences between the species.

Key words

Triticum timopheevi Chromosomes C-banding In situ hybridisation Heterochromatin Translocation 

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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • J. Hutchinson
    • 1
  • T. E. Miller
    • 1
  • J. Jahier
    • 2
  • K. W. Shepherd
    • 3
  1. 1.Plant Breeding InstituteTrumpingtonEngland
  2. 2.Station d'Amelioration des Plants, Domaine de la Motte-au-VicomteCentre de Recherches de RennesLe RheuFrance
  3. 3.Waite InstituteAdelaideAustralia

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