A "new" allele at the C pigment locus in the fowl

J. A. Brumbaugh, T. W. Bargar, W. S. Oetting

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A genetically defined autosomal albino (a) stock of the domestic fowl was developed. By appropriate crosses it was found to be an allele of recessive white (C), but not pink eye (pk) or blue (Bl). Its allelism with recessive white necessitates a change in symbol since it was thought to be at a separate locus. Therefore the C locus in the fowl is multipleallelic. The most dominant allele is wild type, C+, which allows full pigmentation. The most recessive allele is autosomal albinism, which allows the least amount of pigment to develop. The symbol ca would appropriately designate this allele. The slightly more pigmented (faint yellow tinge) allele, which is incompletely dominant to Ca, is the recessive white mutation, c. Concomitant electron microscope studies of both retinal and feather melanocytes were made, which showed both mutant alleles are cytothemically tyrosinase negative, possess hypertrophied golgi systems, and contain numerous vesicles that appear to be incompletely formed, unpigmented granules. Retinal melanocytes possess a few pigmented granules, more in recessive white (C) cells than in albino (Ca) cells.

Original languageEnglish (US)
Pages (from-to)331-336
Number of pages6
JournalJournal of Heredity
Issue number5
StatePublished - Sep 1983

Bibliographical note

Funding Information:
The first two authors are, respectively, professor of genetics, cellular and molecular biology in the School of Life Sciences, University of Nebraska, Lincoln, NE 68588; and electron microscope technologist, in the Laboratory for Electron Microscopy of the School of Life Sciences, University of Nebraska, Lincoln. The third author is currently research associate in the Division of Biorrredical Sciences, University of California, Riverside. This work was supported, in part, by NIH grant 18969 from NIGMS. Please address reprint requests to Dr. Brumbaugh. The authors would like to thank Jean Clay for her assistance in preparing the manuscript. © 1983, American Genetic Association.


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