• Heteroauxin and the production of tetraploid shoots by the callus method inBrassica oleracea

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    • Abstract

       

      1. InBrassica oleracea the frequency of tetraploid callus shoots obtained by decapitation only was found to be about 1 %. The frequency from calluses obtained by heteroauxin treatment was also about 1 %.

      2. The origin of new meristems from vacuolated cells in calluses is described.

      3. Theories to account for the occurrence of tetraploid callus shoots are considered. It is suggested that the tetraploid areas in calluses are caused by the division of vacuolated cells which contain nuclei with diplochromosomes.

    • Author Affiliations

       

      H. W. Howard1

      1. School of Agriculture, Cambridge
    • Dates

       
  • Journal of Genetics | News

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