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E^R => Birchen. Turns the male duckwing into a crowwing but leaves hackle of male and female and male saddle neatly patterned in gold or silver groundcolor; Black breast can be laced in gold or silver; somewhat flattens red tints.
co+ => Non Columbian, recessive.
Db => Dark brown, Name refers to chick down. Columbian-like restrictor of black, Less powerful on hens (patterned back). Co-causer of certain patterns, Acts even under birchen.
Pg => Pattern gene. Orders black pigment in hens to concentric lacing; in males only with help of other genes.
ml+ => Non Melanotic, recessive.
Cha+ => Non Charcoal. Dominant.
mh+ => Non Mahogany, recessive.
di+ => Non Dilute, recessive.
Ig+ => Non Inhibitor of Gold. Dominant.
cb+ => Non Champagne, recessive.
i+ => Non Dominant White. Recessive, leaves black areas black.
bl+ => Non blue. recessive, Pattern remains black.
Lav+ => Non Lavender. Dominant, Pattern remains black.
C+ => Non Recessive White. Complete expression of color, Dominant.
Mo+ => Non Mottled. No white feathertips, Dominant.
b+ => Non Barred. Sex-linked recessive.
s+ => Non Silver, Gold. Sex-linked, recessive.
Choc+ => Non Chocolate. Pattern remains black.
Db,Pg => Db and Pg render autosomal barring, quilt pattern.