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The Dominant Grey budgerigar mutation, often called the Australian Grey or simply Grey, is one of approximately 30 mutations affecting the colour of budgerigars. It is the basis of the Grey-Green and Grey standard varieties.
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'.
The double-factor Dominant Clearbody, with two Dominant Clearbody alleles, is believed to have a clearer body and darker wing markings than the single-factor Dominant Clearbody. The Dominant Clearbody gene is located on one of the autosomal chromosomes. There is no known linkage of this gene with any other mutation.
The Greywing is an autosomal mutation of the dil locus with the symbol dil gw, and so is a member of the multiple allelic series which also includes the Dilute (dil d) and Clearwing (dil cw) mutations. [8] The Greywing allele is recessive to the wild-type, dominant over the Dilute allele and co-dominant with the Clearwing allele.
Articles in this category deal with colour mutations of the Budgerigar, Melopsittacus undulatus. Pages in category "Budgerigar colour mutations" The following 25 pages are in this category, out of 25 total.
The original mutation is thought to have originated in a colony aviary in Texas around 1955. [2] In 1958 Gay Terraneo of Wilmington and Mr John Papin of Long Beach , both in California, obtained respectively a pair and a hen, and showed that the mutation is a sex-linked recessive.
This shows that the mutation cannot be dominant, and led many, initially including Mr Brooks himself, to assume that the mutation was therefore recessive. Indeed, the mutation is often called the Recessive Grey, and both Taylor and Warner [11] and Elliot and Brooks [12] give breeding expectations based on the assumption of simple recessive ...
One of the earliest reports of the appearance of a budgerigar which could have been an Australian Pied was of a bird owned by W G Bowden [2] - it had a clear nape spot and its breeding behaviour clearly showed a dominant inheritance pattern. Mr Bowden obtained or possibly bred the bird in 1931 - he did not report its source.