• The genetics of withering or deciduous bracteoles in cotton

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    • Abstract

       

      The character Withering Bracteole inGossypium hirsutum is shown to be controlled by a single recessive genebw. This gene has a pleiotropic action causing leaf crumpling and also sterility to a greater or less extent. Pollen grains carryingbw appear to have an advantage in fertilization.

      At a low modifier levelF2 ratios of 2·1 Normal: 1 Withering Bract were obtained, andbwbw plants were more or less sterile and had severely crumpled foliage. At a higher modifier levelF2 ratios rose to 7·2∶1, presumably because many of thebwbw plants were indistinguishable from normal. In such families the deleterious effects ofbw were largely masked, but as a result the bracteoles also failed to wither effectively. This gene is therefore considered to be useless as a means of removing the bracteoles to facilitate mechanical picking.

    • Author Affiliations

       

      R. L. Knight1

      1. Empire Cotton Growing Corporation and Sudan Government, Sudan
    • Dates

       
  • Journal of Genetics | News

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