Dark budgerigar mutation

Melopsittacus undulatus male

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Melopsittacus undulatus -blue -pet-8

Dark Budgerigar Mutation refers to a genetic variation found within the budgerigar species (Melopsittacus undulatus), a popular pet bird known for its vibrant colors and sociable nature. This mutation affects the bird's feather pigmentation, resulting in darker shades compared to the standard wild-type coloration. The dark mutation is one of several color mutations in budgerigars, which have been selectively bred for various plumage colors and patterns.

Genetics

The dark mutation in budgerigars is autosomal and incomplete dominant. It is characterized by an increase in the melanin pigment in the feathers, which gives the bird a darker appearance. There are two primary variants of the dark mutation: single factor (SF) and double factor (DF), with the latter resulting in a more pronounced darkening of the plumage. A budgerigar carrying one dark gene (SF) will be darker than the wild type, while one carrying two dark genes (DF) will be even darker.

Appearance

Budgerigars with the dark mutation exhibit a range of colors more intense than their non-mutated counterparts. The mutation affects all the standard budgerigar colors, including green, blue, grey, and violet, making them appear deeper and richer. For example, a green budgerigar with the dark mutation may appear olive green (SF) or even darker green (DF), while a blue budgerigar may appear cobalt (SF) or mauve (DF).

Breeding

Breeding for the dark mutation requires a basic understanding of genetics and Mendelian inheritance. When a single factor dark budgerigar is paired with a non-dark budgerigar, approximately 50% of the offspring are expected to inherit the dark mutation. Breeding two single factor dark budgerigars can produce single factor, double factor, and non-dark offspring in a 1:2:1 ratio. Breeding a double factor dark budgerigar with a non-dark budgerigar will result in all offspring being single factor dark.

Impact on Health

There is no evidence to suggest that the dark mutation negatively affects the health or lifespan of budgerigars. However, as with all pets, maintaining a healthy environment, providing a balanced diet, and ensuring regular veterinary care are crucial for the well-being of budgerigars, regardless of their color mutation.

Popularity

The dark mutation is popular among budgerigar enthusiasts and breeders, who often seek to produce birds with unique and vibrant colors. Budgerigars with this mutation are frequently showcased in bird shows and competitions, where their striking appearance can make them stand out.

See Also

• Budgerigar
• Genetics of budgerigars
• List of budgerigar mutations

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