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The identification of the nucleolus organiser chromosomes of diploid wheat

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Summary

The two nucleolus organiser chromosomes of diploid wheat are identified as 1A and 5A by the combination of in situ hybridisation and cytological markers.

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References

  1. Chapman V, Miller TE, Riley R (1976) Equivalence of the A genome of bread wheat and that of Triticum urartu. Genet Res 27:69–76

  2. Dvořák J (1976) The relationship of Triticum urartu and the A and B genomes of Triticum aestivum. Can J Genet Cytol 18:371–377

  3. Flavell RB, O'Dell M (1976) Ribosomal RNA genes on homoeologous chromosomes of groups 5 and 6 in hexaploid wheat. Heredity 37:377–385

  4. Flavell RB, Smith DB (1974) Variation in nucleolar organizer rRNA gene multiplication in wheat and rye. Chromosoma 47:327–331

  5. Gerlach WL, Miller TE, Flavell RB (1980) The nucleolus organizers of diploid wheats revealed by in situ hybridization. Theor Appl Genet 58:97–100

  6. Gerlach WL, Bedbrook JR (1979) Cloning and characterisation of ribosomal RNA genes from wheat and barley. Nucleic Acid Res 7:1869–1885

  7. Hutchinson J, Chapman V, Miller TE (1980) Chromosome pairing at meiosis in hybrids between Aegilops and Secale species: a study by in situ hybridisation using cloned DNA. Heredity 45:245–254

  8. Hutchinson J, Miller TE (1982) The nucleolar organisers of tetraploid and hexaploid wheats revealed by in situ hybridisation. Theor Appl Genet 61:285–288

  9. Miller TE, Gerlach WL, Flavell RB (1980) Nucleolus organiser variation in wheat and rye revealed by in situ hybridisation. Heredity 45:377–382

  10. Miller TE, Reader SM (1980) Variation in the meiotic chromosome pairing of hybrids between hexaploid and diploid wheats. Cereal Res Commun 8:477–483

  11. Miller TE, Shepherd KW, Riley R (1981) The relationship of chromosome 4A of diploid wheat to that of hexaploid wheat: a clarification of an earlier study. Cereal Res Commun 9:327–329

  12. Teoh SB, Hutchinson J (in preparation) A comparison of the chromosomal distribution of cloned repetitive DNA sequences in different Aegilops species

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Miller, T.E., Hutchinson, J. & Reader, S.M. The identification of the nucleolus organiser chromosomes of diploid wheat. Theoret. Appl. Genetics 65, 145–147 (1983). https://doi.org/10.1007/BF00264881

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Key words

  • Diploid wheat
  • Nucleolus organiser
  • In situ hybridisation
  • Telocentric markers