Principles of Plant Breeding (2+1)

Random drift or Genetic drift

• It is a random change in gene frequency due to sampling error. Random drift is more in small population than larger.Ultimately the frequency of one of the allele becomes zero and that of the other allele becomesone. The allele with the frequency one is fixed in the population because there would be no change in the frequency. So all genes become homozygous. The genetic drift can be reduced by handling large population.