From :
"Sticky" topics index ..... genetics " :
" Mechanics of the 'White' Color and Pied Pattern
White and Pied birds are NOT albinos or partial albinos (ok, they are not USUALLY. An albino peafowl would be white, but a white peafowl is not typically an albino). "
White wild peacocks in India .... but we will never know if they are total leucism birds or albino (even when there is this possibility!).
In Bhiwani ( India ).
http://www.indianwildlifeclub.com/ezine/whitePeacock.jpg
In Ramanashramam (India ).
http://gkamesh.files.wordpress.com/2008/09/white-peacock.jpg
Partial leucism in wild Sri Lanka :
" Albinism is the absence of melanin production in the body and applies ONLY to birds who fail to produce melanin. A partial albino is a creature who has other forms of pigmentation (for example, carotenoids) and may still display some color. Albinos will lack color in their skin and eyes, not just their feathers.
Leucism, on the other hand, is a failure to properly deposit pigment (all pigments) on the feathers due to the failure of pigment cells to move to their proper location on the body from the neural crest. Leucism affects only the feathers of the bird, leaving the skin and eyes normal colored. Partial leucism results in the pied coloration (in any bird, not just peafowl. Wild pied or piebald birds can be found, but are very rare and usually are killed quickly by predators or do not get to breed because they don't look right). Total leucism can result in a completely white bird, which is how we have white peafowl.
Pale leucism can affect part or all of a bird, resulting in washed out plumage instead of totally white plumage. "
Pale leucism birds :
http://4.bp.blogspot.com/-4-jLlCJ1qKU/ULTmunnT9jI/AAAAAAAALpQ/4l20Iz2CvvU/s1600/Three+Hens.jpg
http://www.photosension.com/foto-galleri-billede/public/leucistic-gentoo-penguin-20030117-8012.jpg
http://0.tqn.com/d/birding/1/0/g/A/-/-/leumagpie.jpg
"A white bird cannot also be a pied bird, as the pied gene is an allele for the white gene. A bird cannot be both a partial leucistic bird (pied) and a total leucistic bird (white) at the same time. It is also true that a total leucistic bird will never revert to partial leucism, meaning a white bird will never create a pied bird offspring. "
I have two questions:
Indian blue peacock Opal would not be a pale leucism of IB?
Indian blue peacock silverpied would not be the pale partial leucism of IB?
"Sticky" topics index ..... genetics " :
" Mechanics of the 'White' Color and Pied Pattern
White and Pied birds are NOT albinos or partial albinos (ok, they are not USUALLY. An albino peafowl would be white, but a white peafowl is not typically an albino). "
White wild peacocks in India .... but we will never know if they are total leucism birds or albino (even when there is this possibility!).
In Bhiwani ( India ).
http://www.indianwildlifeclub.com/ezine/whitePeacock.jpg
In Ramanashramam (India ).
http://gkamesh.files.wordpress.com/2008/09/white-peacock.jpg
Partial leucism in wild Sri Lanka :
" Albinism is the absence of melanin production in the body and applies ONLY to birds who fail to produce melanin. A partial albino is a creature who has other forms of pigmentation (for example, carotenoids) and may still display some color. Albinos will lack color in their skin and eyes, not just their feathers.
Leucism, on the other hand, is a failure to properly deposit pigment (all pigments) on the feathers due to the failure of pigment cells to move to their proper location on the body from the neural crest. Leucism affects only the feathers of the bird, leaving the skin and eyes normal colored. Partial leucism results in the pied coloration (in any bird, not just peafowl. Wild pied or piebald birds can be found, but are very rare and usually are killed quickly by predators or do not get to breed because they don't look right). Total leucism can result in a completely white bird, which is how we have white peafowl.
Pale leucism can affect part or all of a bird, resulting in washed out plumage instead of totally white plumage. "
Pale leucism birds :
http://4.bp.blogspot.com/-4-jLlCJ1qKU/ULTmunnT9jI/AAAAAAAALpQ/4l20Iz2CvvU/s1600/Three+Hens.jpg
http://www.photosension.com/foto-galleri-billede/public/leucistic-gentoo-penguin-20030117-8012.jpg
http://0.tqn.com/d/birding/1/0/g/A/-/-/leumagpie.jpg
"A white bird cannot also be a pied bird, as the pied gene is an allele for the white gene. A bird cannot be both a partial leucistic bird (pied) and a total leucistic bird (white) at the same time. It is also true that a total leucistic bird will never revert to partial leucism, meaning a white bird will never create a pied bird offspring. "
I have two questions:
Indian blue peacock Opal would not be a pale leucism of IB?
Indian blue peacock silverpied would not be the pale partial leucism of IB?
