SummaryA search was made for association of egg numbers and egg quality traits with genes for frizzling (n, muffs and beard (Mb), and their normal alleles in domestic fowl. Hens from the fifth, sixth, and seventh generations of a segregating population were each studied for two months late in their first production year. Egg numbers, weight, shell thickness, albumen quality, and incidence of blood spots and meat spots were compared. Hens with muffs and beard produced eggs with thin shells (P < .01) compared to hens with the wild-type allele. There were no major effects of feathering loci on other egg characteristics examined.
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