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Rose comb: an example of operational over-dominance in the domestic fowl*

Published online by Cambridge University Press:  14 April 2009

Thomas W. Fox ,
Roy D. Crawford  and
J. Robert Smyth Jr
Thomas W. Fox
Affiliation:
University of Massachusetts, Amherst, Mass., U.S.A.
Roy D. Crawford
Affiliation:
University of Massachusetts, Amherst, Mass., U.S.A.
J. Robert Smyth Jr
Affiliation:
University of Massachusetts, Amherst, Mass., U.S.A.
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The pleiotropic effect of the rose-comb gene (R) on fertility when combined with artificial selection against the single-comb type (r) results in an interesting example of operational over-dominance. An evaluation of the equilibrium frequency of the rose-comb gene based on this over-dominance concept provides a plausible explanation for the relatively high frequency of single-comb birds appearing in the Wyandotte breed of fowls.

Type
Research Article
Information
Genetics Research , Volume 5 , Issue 3 , November 1964 , pp. 379 - 383
Copyright
Copyright © Cambridge University Press 1964

References

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