Mutations

An area to discuss Birds that are different
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hanabi
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Re: Mutations

Post by hanabi » 07 Dec 2017, 17:09

Alvin the breast on your cock offspring looks a little too light to be purple so perhaps it is lilac, and that may explain why his back colour is closer to yellow rather than green. Either way that cock appears to be a single factor pastel cock, with red head and lilac breast, the cock parent of which was probably one of your DF green back cocks. I agree that the cock parent being a DF pastel blue doesn't make sense.

Anyway I'm the newbie here so what do the veterans think?

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Craig52
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Re: Mutations

Post by Craig52 » 07 Dec 2017, 17:09

Can i ask what a DF green back cock is, isn't DF a yellow backed cock bird ?? and a single factor cock a yellowy/green backed bird unless it has a white breast.
The two birds pictured are Euro SFPB's cocks. Craig

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hanabi
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Re: Mutations

Post by hanabi » 07 Dec 2017, 18:08

Can i ask what a DF green back cock is,
I also wondered about "DF green" but I assume alvin means a normal (not split to yellow) green back, i.e., green+green, rather than green+yellow (SF pastel yellow) or yellow+yellow (DF pastel yellow).
The two birds pictured are Euro SFPB's cocks.
Well, one has a white breast, but anyway :P The other cock's breast seems to be lilac to me, and that would explain why this cock's back looks closer to yellow than green (lilac being related to the white gene). Here is a comparison of two of my purple breasted cocks and two of my purple breasted hens, with alvin's cock in the centre. Seems to be closer to the PB hens' breast colour, yet it is a cock, so probably lilac breasted, no?
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Tiaris
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Re: Mutations

Post by Tiaris » 07 Dec 2017, 18:53

Does lilac-chested affect back colour at all in euro yellows?

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Tiaris
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Re: Mutations

Post by Tiaris » 07 Dec 2017, 19:02

alvin wrote:
07 Dec 2017, 15:25
Hi Tiarus
These 2 birds actually come from a DF pastel blue and a yellow hen, I thought I had 2 DF cocks until they started to colour. DF don't have that light blue around the head, under the beak is a very light grey. Both parents are PB. Given the combination it doesn't make sense. There were DF green back cocks in the same aviary but they wont produce this result.
DF look in Shane's recent post of his Gouldian mutation. A DF RH cock has very obvious blue around the head.
Also when you say DF pastel cock to yellow hen do you mean euro yellow or AY?

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hanabi
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Re: Mutations

Post by hanabi » 07 Dec 2017, 19:21

Does lilac-chested affect back colour at all in euro yellows?
I believe it simply follows the "rules" of the white breast gene, i.e., for SF Euro yellow cocks, a lilac breast will produce a "more yellow than green" back, while a purple breast will produce a "more green than yellow" back, as seen in my two images in this thread.

I have a lilac-breasted SF Euro yellow cock and he looks similar to the SF Euro yellow cock in my image above (albeit with less of a green hue):
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hanabi
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Re: Mutations

Post by hanabi » 07 Dec 2017, 19:25

A DF RH cock has very obvious blue around the head.
Interesting. We don't see that at all here. Perhaps a very fine hint of blue, if any?
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Craig52
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Re: Mutations

Post by Craig52 » 07 Dec 2017, 19:37

Euro Yellow backs are an easy mutation to understand imo. Yes his bird has a lilac chest and yes WB is related to lilac hence the lighter back colour.
No one here has explained to me about a DF green back bird which is impossible to have, a DF yellow back carries too yellow genes so a DF cock to a green backed hen produces all SF yellow back cocks and hens and very rarely can produce an odd green back hen of which is pure normal.
A SFYB cock to a SFYB hen can produce an odd GB bird also but it can produce DF cocks, SF hens and SF cocks.
Tiaris, not necessarily. All the double factor cocks i bred had white not blue pencil line around the back of the mask.
Gees, my heads spinning brains getting a bit old :roll: Cheers Craig

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Craig52
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Re: Mutations

Post by Craig52 » 07 Dec 2017, 19:51

Hanabi, imo your SFYB yellow head is not a lilac breast it is a dirty WB bird. The true meaning of lilac is both cock and hens breasts are the same colour, lilac. Alvins bird is lilac same colour as a normal coloured hen.
Craig

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starman
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Re: Mutations

Post by starman » 07 Dec 2017, 19:57

Craig52 wrote:
07 Dec 2017, 19:37
Gees, my heads spinning brains getting a bit old :roll: Cheers Craig
Gouldian genetics addles my brain, I try to understand it, but just when I think I'm getting there something comes up to make me realise that I don't get it at all..... come to think of it, genetics in general is a bit of a mystery to me. :?
Sm.
Avid student of Estrildids in aviculture.

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