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N-banded karyotypes of wheat species

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Abstract

Nine of the twenty-one chromosome pairs of the hexaploid wheat Triticum aestivum var. Chinese Spring (genome constitution AABBDD) show distinctive N-banding patterns. These nine chromosomes are 4A, 7A and all of the B genome chromosomes. The remaining chromosomes show either faint bands or no bands at all. Tetraploid wheat, T. dicoccoides (AABB), showed banded chromosomes similar to those observed in the hexaploid. Of the diploid species T. monococcum, T. boeoticum, T. urartu and Aegilops sauarrosa showed little or no banding as would be expected of donors of the A and D genomes. Ae. speltoides had a number of N-banded chromosomes as would be expected of a candidate for the B genome donor. Since N-bands are not evident on some nucleolar organiser chromosomes, the staining specificity cannot be correlated with the presence of nucleolar organiser regions.

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References

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

    Google Scholar 

  • Chen, K., Gray, J.C., Wildman, S.G.: Fraction 1 protein and the origin of polyploid wheat. Science 190, 1304–1306 (1975)

    Google Scholar 

  • Crosby, A.R.: Nucleolar activity of lagging chromosomes in wheat. Amer. J. Bot. 44, 813–822 (1957)

    Google Scholar 

  • Dhaliwal, H.S., Johnson, B.L.: Anther morphology and the origin of the tetraploid wheats. Amer. J. Bot. 63, 363–368 (1976)

    Google Scholar 

  • Faust, J., Vogel, W.: Are N-bands selective staining of specific heterochromatin? Nature (Lond.) 249, 352–353 (1974)

    Google Scholar 

  • Flavell, R.B., Smith, D.B.: Variation in nucleolar organiser gene multiplicity in wheat and rye. Chromosoma (Berl.) 47, 327–334 (1974)

    Google Scholar 

  • Funaki, K., Matsui, S., Sasaki, M.: Location of nucleolar organisers in animal and plant chromosomes by means of an improved N-banding technique. Chromosoma (Berl.) 49, 357–370 (1975)

    Google Scholar 

  • Gill, B.S., Kimber, G.: Giemsa C-banding and the evolution of wheat. Proc. nat. Acad. Sci. (Wash.) 71, 4086–4090 (1974)

    Google Scholar 

  • Gupta, P.K.: Cytogenetic evolution in Triticum and related genera. In: Advancing frontiers in cytogenetics in evolution and improvement of plants (Kachroo, P., ed.), pp. 32–37. Delhi: Hindustan 1974

    Google Scholar 

  • Johnson, B.L.: Identification of the apparent B-genome donor of wheat. Canad. J. Genet. Cytol. 17, 21–39 (1975)

    Google Scholar 

  • Kimber, G., Larsen, J.: The B-genome of polyploid wheat. Cereal Res. Comm. 1, 17–24 (1973)

    Google Scholar 

  • McFadden, E.S., Sears, E.R.: The origin of Triticum spelta and its free threshing hexaploid relatives. J. Hered. 37, 81–116 (1946)

    Google Scholar 

  • McFadden, E.S., Sears, E.R.: The origin of Triticum spelta and its free threshing relatives. J. Hered. 37, 81–116 (1946)

    Google Scholar 

  • Morris, R., Sears, E.R.: The cytogenetics of wheat and its relatives. In: Wheat and wheat improvement (K.S. Quisenberry and L.P. Reitz, eds.), pp. 19–87. Amer. Soc. Agron. 1967

  • Pimpinelli, S., Santini, G., Gatti, M.: Characterization of Drosophila heterochromatin II C- and N-banding. Chromosoma (Berl.) 57, 377–386 (1976)

    Google Scholar 

  • Rees, H., Walters, M.R.: Nuclear DNA and the evolution of wheat. Heredity 20, 73–82 (1965)

    Google Scholar 

  • Riley, R., Chapman, V.: The D genome of hexaploid wheat. Wheat Inf. Serv. 11, 18–19 (1960)

    Google Scholar 

  • Riley, R., Unrau, J., Chapman, W.: Evidence on the origin of the B genome of wheat. J. Hered. 49, 91–99 (1958)

    Google Scholar 

  • Sakar, P., Stebbins, G.L.: Morphological evidence concerning the origin of the B genome in wheat. Amer. J. Bot. 43, 297–304 (1956)

    Google Scholar 

  • Sears, E.R.: The B genome of Triticum. Wheat Inform. Serv. 4, 8–10 (1956)

    Google Scholar 

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Gerlach, W.L. N-banded karyotypes of wheat species. Chromosoma 62, 49–56 (1977). https://doi.org/10.1007/BF00328439

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  • DOI: https://doi.org/10.1007/BF00328439

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