Guinea fowl plumage color inheritance, with particular attention on the dun color.
The genetic basis of the dun-dundotte plumage colour of the pearl guinea fowl was determined, and the relationship of this locus with the locus that causes the blue colouration was also studied. Results of test matings showed that the dun colour was controlled by a single autosomal recessive gene, to which the gene symbol d was assigned. This locus was independent of the blue gene locus, and when both loci were homozygous for their mutant genes, a very dilute blue-dun colour was produced. The results led to a hypothesis of gene action for the blue and dun genes.