COMB DIMORPHISM IN WYANDOTTE DOMESTIC FOWL. 2. POPULATION GENETICS OF THE ROSE COMB GENE

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Abstract
An explanation in terms of population genetics is presented which accounts for the high incidence of single comb segregants in the rose-combed Wyandotte breed of domestic fowL Based on evidence given in a preceding paper, it is assumed that the bred is reproduced using RR and Rr females mated only to Rr males; RR males, though present, are effectively sterile; single comb (rr) birds are discarded from the breeding population. Under these conditions, equilibrium is reached very rapidly, and a theoretical frequency of 0.1464 single comb individuals results. This frequency is in very close agreement with that actually found in several populations.