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GENE FREQUENCY CHANGES AT THE 
-AMYLASE LOCUS IN EXPERIMENTAL
POPULATIONS OF DROSOPHILA PSEUDOOBSCURA
Darrell G. Yardley 1, Wyatt W. Anderson 2, and Henry E. Schaffer 3
1 Department of Zoology, Clemson University, Clemson, South
Carolina 29631
2 Department of Zoology, University of Georgia, Athens, Georgia
30602
3 Department of Genetics, North Carolina State University, Raleigh,
North Carolina 27607
The frequencies of alleles at the 
-Amylase locus of
D. pseudoobscura were followed in both large and small experimental populations.
No evidence for balancing or directional selection was found, although our
ability to detect weak selection is limited. The gene frequency changes in
our experimental populations were consistent with the hypothesis of selective
neutrality and genetic drift due to sampling error.
Revised on May 20, 1977
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