The genetics of poultry color in poultry

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2017-05-17
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Knox, C.
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Extension and Experiment Station Publications
It can be very challenging to locate information about individual ISU Extension publications via the library website. Quick Search will list the name of the series, but it will not list individual publications within each series. The Parks Library Reference Collection has a List of Current Series, Serial Publications (Series Publications of Agricultural Experiment Station and Cooperative Extension Service), published as of March 2004. It lists each publication from 1888-2004 (by title and publication number - and in some cases it will show an author name).
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Abstract

1. The chromogen gene for color, CC, acted as a simple dominant.

2. The extension of black pigment, EE, was inherited on a simple monohybrid basis.

3. The heterozygous extension and chromogen genes (Cc Ee) had a balanced relationship. This combination of heterozygous factors weakened the expression of the black melanic pigment in the presence of two or more doses of buff.

4. Buff color was controlled on a dihybrid basis, the following symbols being used, Bu Bu Bu' Bu'.

5. Three or more doses of the buff genes in the presence of homozygous color factors, CC, were epistatic to black, and gave a buff color.

6. Two or more doses of the buff color determiners were epistatic to black when they were in the presence of both the extension of black and chromogen factors in a heterozygous state.

7. When the extension factor was homozygous, EE, the buff color was hypostatic to black if not present in three or more doses.

8. All the factors included thus far in the summary were autosomal.

9. The sex-linked factor for barring (BB and B-) appeared to act as a simple dominant to black and buff colors.

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