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This article in CS

  1. Vol. 7 No. 6, p. 619-621
    Received: June 5, 1967

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Spread of an Undesirable Gene in Populations of Phaseolus lunatus L.1

  1. C. L. Tucker,
  2. Timothy Prout and
  3. James Harding2



An experimentally purified population of Phaseolus lunatus L. ‘Concentrated Fordhook’ was used to estimate the recurrent mutation rate of the recessive allele w to the dominant allele W. No mutations were found in the sample of 387,684 gametes tested and the maximum possible mutation rate was estimated to be 1.5 × 10−5. The frequency of the dominant allele was estimated in a commercial (unpurified) population and found to be 3.1 × 10−3. A mathematical analysis indicated that this maximum recurrent mutation rate could not account for the spread of the undesirable W allele in commercial populations of Concentrated Fordhook. A minimum selective advantage of 11% for the WW genotype was proposed and the disparity between this estimate and the previously reported estimate of a 40 per cent disadvantage was discussed.

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