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Andalusian Blue PDF Print E-mail
Friday, 06 June 2008

Genetics of Blue Feathers

by an Unknown Author edited by Alan Stanford, Ph.D.
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Blue, as in Andalusian Blue, is caused by a "modifying gene", an autosomal, incompletely dominant gene (Bl) that, when bred to a "pure" black bird, produces the desired "Andalusian Blue" only in the heterozygous form.

In the Andalusian Blue, the ideal feathering is be an even shade of ashy, blue-gray throughout the bird, with each feather laced in black. The edges of the feathers are black; the birds look like Black Silkies until you see their undercoat. The female birds look more evenly colored, while the males are very black in the hackle, saddle, and wingbows, due to their sexually dimorphic plumage.

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