Further studies on the inheritance of the marbled chickdown phenotype of the domestic fowl.
1. An investigation was conducted among the progeny from crosses between Birchen Modern Game and Silver Sebright bantams into the inheritance of the marbled chickdown phenotype of the latter. 2. The marbled chickdown phenotype has been shown to depend upon homozygocity of both the birchen allele ER at the E-locus and the eumelanin restrictor gene Db. However, all stock used to establish this result were also homozygous for the linked eumelanin intensifier melanotic Ml and the pattern gene Pg, therefore yielding no information on the roles of Ml or Pg in the marbled chickdown phenotype. 3. Examination of the F2 generation both of chickdown and of adult plumage demonstrated the marbled chickdown to be homozygous ER (Db-Pg) with Ml dosage having an effect on adult plumage.
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D000818:Animals; D002645:Chickens / Q000235:genetics*; D005241:Feathers; D005260:Female; D006720:Homozygote; D008297:Male; D010641:Phenotype; D010858:Pigmentation / Q000235:genetics*