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The science of budgerigar color genetics deals with the heredity of mutations which cause color variation in the feathers of the species known scientifically as Melopsittacus undulatus. Birds of this species are commonly known by the terms 'budgerigar', or informally just 'budgie'.
When combined with the Dark mutation the body colour of both Greys and Grey-Greens becomes slightly darker, but the effect is much smaller than the effect of the Dark mutation on Light Greens and Skyblues. As this is a dominant mutation the colour changes described above apply to both single factor (SF) and double factor (DF) Greys and Grey-Greens.
In total there are 18 visually different combinations of these three mutations. However, only three of these approximate to the colour specified by the visual violet exhibition standard. [1] [2] The World Budgerigar Organisation has established precise standards for some budgerigar body colours using the Pantone Codes. The colours of the ...
The loci of the Dark budgerigar mutation and the Blue allelic series are situated on the same autosome, so the Dark mutation is linked to the Blue allelic series (see genetic linkage). The cross-over value (COV) or recombination frequency between the Dark and Blue loci is commonly stated to be about 14%, [ 8 ] but some experiments have found ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 17 February 2025. Small, long-tailed, seed-eating parakeet Budgerigar Temporal range: Pliocene–Holocene Pre๊ ๊ O S D C P T J K Pg N Blue cere indicates male Flaking brown cere indicates female in breeding condition Conservation status Least Concern (IUCN 3.1) Scientific classification Domain ...
In an attempt to regularise the names of mutations across all psittacines, it has been proposed by Inte Onsman [1] that the name Pale Fallow be adopted for this mutation. The name Dun Fallow has also been proposed, and Terry Martin suggests [2] Beige Fallow or Grey-Brown Fallow. But in Budgerigar circles the variety is commonly known as the ...
The World Budgerigar Organisation has established precise standards for some budgerigar body colours using the Pantone Codes, as shown to the right for the Lutino. The Ino mutation also induces changes in the nestling. The down is white rather than grey and appears only sparsely, never growing down the centre of the back.
The SF Yellowface II Skyblue variety, described in Appearance above, is a composite of the Blue and Yellowface II mutations, having one allele of each. The loci of the Dark budgerigar mutation and the Blue allelic series are situated on the same autosome, so the Dark mutation is linked to the Blue allelic series (see genetic linkage).