• The genetics ofArmadillidium vulgare latr. - III. dominant and recessive genes for red body colour

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    • Abstract

       

      1. The common colour m the woodlouse,Armadilldium vulgare, is black or grey.

      2. Bed animals occur at a frequency of from 5 to 8 % in many populations.

      3. Reel body colour may be due to animals being homozygous or heterozygous for a dominant gene R, or to animals being homozygous for a recessive gene r.

      4. Animals homozygous for the recessive gene r and homozygous or heterozygous for the dominant gene R cannot be distinguished.

      5. R and r are allelomorphic, the series being R (dominant red), + (black), r (recessivered).

      6. The black and red pigments are melanins.

      7. It is suggested that inA. vulgare, which is a polymorphic species, the nature of the original mutations has determined whether the genes for red body colour should be dominant or recessive. My thanks are due to Dr M. G. M. Pryor (of the Department of Zoology, Cambridge) for suggesting the silver staining method and to my wife for help in making the collections.

    • Author Affiliations

       

      H. W. Howard1

      1. University of Cambridge, School of Agriculture, Edinburgh
    • Dates

       
  • Journal of Genetics | News

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