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Linkage in the tetraploidPrimula sinensis

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Summary

  1. 1.

    An account is given of six types of linkage observed between three pairs of factors in the tetraploidPrimula sinensis, and of a seventh theoretically possible type.

  2. 2.

    The intensity of linkage is nearly, but not quite, the same in the tetraploid as in the diploid. It is the same on the two sides in the tetraploid.

  3. 3.

    As regards the factors considered, there is no evidence of crossingover involving more than two chromosomes at a time, or of two chromosomes going to the same pole after crossing-over.

  4. 4.

    The six readily available gametic series contain only one adjustable constantp, and since the experimental results in other cases agree reasonably well with prediction whenp has been calculated from the results of single coupling, this affords substantial support of the chromosome theory of inheritance.

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References

  • Bridges, C. B. andAnderson, E. G. (1925). “Crossing-over in the X chromosomes of triploid females ofDrosophila melanogaster.”Genetics, x, 418.

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  • Darlington, C. D. (1931). “Meiosis in Diploid and TetraploidPrimula sinensis.“Journ. Gen. xxiv, 65.

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  • Fisher, R. A. andBalmukand, B. (1928). “The estimation of linkage from the offspring of selfed heterozygotes.”Ibid. xx, 79.

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  • Gregory, R. P., de Winton, D. andBateson, W. (1923). “Genetics ofPrimula sinensis.”Ibid. xiii, 219.

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  • Gregory, R. P. (1914). “On the genetics of tetraploid planta inPrimula sinensis.”Proc. Roy. Soc. B, lxxxvii, 484.

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  • Haldane, J. B. S. (1930). “Theoretical genetics of Autopolyploids.”Journ. Gen. xxii, 359.

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  • Sverdrup Sömme, A. (1930). “Genetics and Cytology of the Tetraploid Form ofPrimula sinensis.”Ibid. xxiii, 447.

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Authors and Affiliations

  1. John Innes Horticultural Institution, Merton

    D. de Winton & J. B. S. Haldane

Authors
  1. D. de Winton
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  2. J. B. S. Haldane
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de Winton, D., Haldane, J.B.S. Linkage in the tetraploidPrimula sinensis . Journ. of Genetics 24, 121–144 (1931). https://doi.org/10.1007/BF03020826

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  • DOI: https://doi.org/10.1007/BF03020826

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