GCC Mutations and Explanations.
Posted 04 April 2010 - 07:19 PM
Here is a visual Normal GCC. This is also called 'wild color' or 'wild trait'.
Sex-linked recessive mutations - cinnamon, opaline and pineapple (cinnamon opaline).
With sex-linked recessive mutations, the color gene is on the X chromosome. In parrots the males are XX and the females are XY. For males to visually show the mutation, they must have the mutation genes on both X chromosomes. If they only have it on one of the X chromosome (aka "split to"), they will look like the normal wild-type green bird, but can pass along the mutation to their offspring.
For females, they only have to have the mutation genes on the single X chromosome to visually show the mutation. Because it is sex-linked, the mutation cannot be carried on the Y chromosome. Therefore, females cannot be split to sex-linked recessive mutations. Females either will show the mutation or not carry it at all. A case of what you see, is what you get.
Pineapple (cinnamon opaline):
"Turquoise" mutation : Actually, it's called 'par-blue' (which isn't a 'true' blue!), is an autosomal recessive mutation. Autosomal recessive mutations require the mutation genes to be present on both the X's in males or both the X and Y in females for the mutation to be visual.
If it is only on one of the chromosomes, the bird will be "split to " the mutation and will be a visual normal green bird, but can still pass along the trait to its offspring. Here's the fun part though, because it's an autosomal recessive inheritance, BOTH males and female can be split to the mutation.
If a bird has a blue mutation, what this really means is that it has a inhibitor of yellow pigment. Most wild-type normal birds are visually green to the human eye, but their feathers, if you saw them really close under a microscope, you'd see each feather is a mix of blue on one side and yellow on the other, thus giving the illusion of green. Since blue + yellow = green, if the yellow is inhibited, the bird will be just blue. With par-blue, the inhibition of yellow pigment is incomplete, so the bird can have a varying expression of green within the blue - unlike a true blue. This is why some bloodlines of par-blue GCC's are darker or lighter, more green or more blue than others. I believe you can find true blues in - for example - Indian Ringnecks.
If you combine the sex-linked recessive and autosomal recessive mutations. Some of these combinations include:
Cinnamon Turquoise, Opaline Turquoise and Pineapple Turquoise.
More color mutations are happening all the time. You can see some stunning new variations such as 'red-cheeked' versions of both Opaline and Pineapples which is just an intensification of color based on breeding generations of the same mutation together, dilutes, and more. This post is only bringing to light the basic mutations and can be revised later when new mutations become standard enough in the pet trade to be explained further.
For now, you can see some of the newer ones here:
mutation colors Green-Cheeked Conures of The Feather Tree
Taking a posting break! On Hiatus! If you need me directly for help or questions, email! Have fun guys!
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