• The bearing of the frequencies of x-ray induced interchanges in maize upon the mechanism of their induction

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    • Abstract


      A study of X-ray induced interchanges in maize has shown, in theF1 progeny from irradiated pollen, that individuals with two rings of four chromosomes are slightly more frequent than those with a ring of six chromosomes. Similar relations between these two classes hold at different X-ray doses. These facts may be accounted for on the contact hypothesis or on the breakage hypothesis if it be supposed that structural rearrangements chiefly follow breaks occurring in nearby positions. The data cannot be used to decide whether translocations require one or more hits for their production.

    • Author Affiliations


      D. G. Catcheside1 2

      1. the Rockefeller Foundation, Wm. G. Kerckhoff Laboratories, California Institute of Technology, Pasadena
      2. Connecticut Agricultural Experiment Station, New Haven
    • Dates

  • Journal of Genetics | News

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