Fawn-2: a dominant plumage color mutation in Japanese quail

Article Abstract:

Gene symbol Y(super f2) is proposed for the gene that controls the fawn-2 plumage color mutation of Japanese quail. The plumage color results from a partially dominant autosomal gene allelic to and partially dominant over the yellow (Y) gene. The yellow gene is probably homologous to fawn or is a third mutant allele at the Y locus. The fawn-2 chicks have a uniformally creamy yellow body with three dark stripes over the back. Adult homozygous fawn-2 females have more dark speckles on their back than adult homozygous males.

Mutation (Biology), Mutation, Color of birds, Bird coloration

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Light down lethal: a new autosomal recessive down color mutation in Japanese quail

Article Abstract:

A new variety of Japanese quail involving a lighter pigmentation of the plumage pattern has been called light down lethal by researchers because only two males out of 190 chicks survived to adulthood. The genetic mutation is an autosomal recessive with perinatal lethality, similar to both white-feathered down and faded shaker colorations. However, it is the only mutation that combines almost total lethality with a normal body shape and behavior, the only difference being the coloration.

Organic pigments, Lethal mutation, Animal mutation

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Light down-dominant plumage color mutation with homozygous lethality in Japanese quail

Article Abstract:

An incompletely dominant autosomal gene, for which the symbol L is proposed, expressed itself as a new plumage color mutation in Japanese quail, Coturnix japonica, named light down (LD) for its appearance at the time of hatching. In these heterozygous neonates, the yellowish stripes are broad and the black stripes on the head and back are narrow, creating a lighter external appearance than that of the wild type.

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