Les albinos sont vraiment des whiteface lutinos. Il n'y a pas vraiment d'albinos chez les calopsittes.
D'après ce que j'ai compris, il y aurait beaucoup plus de femelles whiteface lutinos que de mâles, à cause de la génétique impliquée.
Genetically, the albino cockatiel is really combination mutation: Lutino-Whiteface. It is not it's own gene. The albino cockatiel cannot pass along one gene to produce another albino. Instead, one sex-linked Lutino gene and one autosomal recessive Whiteface gene are passed separately to the offspring. If a Lutino-Whiteface (Albino) male were mated to a normal hen, none of the resulting babies would be albino. Also, none of the resulting babies would be "split to albino," another misnomer. All the male offspring produced by this mating would be normal grey split to Lutino and Whiteface. The female babies would be Lutino split to whiteface. If there were a "true Albino" mutation, it would exist as a single gene, probably sex-linked, and all the female babies would look like their father.
http://www.upatsix.com/fyi/tiel_genetics.htm
A careful note to make is the albino cockatiel. There is no such thing as an albino cockatiel. The solid white cockatiels, with red eyes, are actually the lutino (the solid yellow/white body) and the white face (the lack of a cheek spot, and the lack of any yellow or orange pigment) mutations combined together, making the bird totally and completely white (with the red eyes of the lutino).
http://www.tailfeathersnetwork.com/bird ... ations.php
The reason we don't get a white bird from the lutino gene is because birds do not just have one form of pigment, ie melanin, as mammals do. Birds have grey family pigments (melanin) and yellow family pigments (psittacins). To get a white bird both these pigments need to be removed and there is no one gene that is capable of doing that. Having said this though it is possible to get a white bird by the combining of the lutino gene that removes the melanin and the blue or whiteface gene that removes the yellow. Thus the albino cockatiel is genetically a Whiteface Lutino.
http://members.optusnet.com.au/~geoffwa ... tiels.html
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