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Parblue mutations – PPR partial psittacine reduction

Lots of breeders are asking questions about possible new alleles of the blue locus in ringnecks.
I am afraid that the answer to this question is not that easy. Till now, only 2 “parblue” loci are recognized: aqua and turquoise. That doesn’t mean that other alleles are not possible. The only problem is how to determine that a particular phenotype is indeed a new allele, because a PPR (partial psittacine reduction) mutation is not as simple as we might think.

The blue colors seen in feather barbs of several bird species is produced by interference. But not only this interference has its influence on the final color, lots of other factors can change the visual color of a feather, so also a parblue feather.

Here is list with possible factors that can change the color

Structural changes:

  • The width of the spongy zone (is also related to the dark factor)
  • The nanostructure of the keratin in the spongy zone (is also responsible for the violet factor)

Chemical changes:

  • Of course the amount of psittacine left in the cortex will change the color of a parblue. (Now we consider a parblue with an equal reduction in all feathers (+/-50%) as aqua and the turquoise allele gives us a variable reduction in the feathers.)
  • The chemical composition of the keratin

Genetic causes that can change the color:

  • Combinations with other parblue alleles
  • Combinations with other mutations: slaty, misty, etc
  • Anticipation of the turquoise locus can change the amount of psittacine (a good example is the roseicollis, there the turquoise birds are visually almost completely blue, just by selection on the most ‘blue’ birds)
  • Crossing-overs can combine different factors and give us the wrong impression that we are dealing with only one mutation
  • Pleiotropy, modifying genes and polygeny, translocations etc. All these processes can also influence the color of an existing parblue gene without being a new mutation.

So as you can read, a parblue is not only a matter of more or less psittacine reduction.

I can image that some breeders are waiting for straight answers, but that is for the moment not possible since all these factors can be responsible. We can not determine if a different phenotype is indeed a mutation or a different allele of an existing gene only by examining cross sections of feathers. We need more and liable info on this. So instead of arguing, I suggest that these breeders better start to set up some serious breeding programs.

If there are ‘other par blues’, we have to do lots of test matings. Combinations with pure wild types are strongly recommendable. Only that way we will be able to breed pure homozygous parblues. If we have those homozygous phenotypes we can start to combine them with other proved alleles so we can see what is happening. That will take lots of time, but it is the only way to get some clear answers in the future.
Remember a phenotype is not always a mutation – (genotype) …. just my thoughts .

15 Responses to Parblue mutations – PPR partial psittacine reduction

  1. Main Rizwan Ul haq says:

    Dear sir,
    I have a strange situation. I got a pair of parblue Fischer female and Pastle DD sable male. But I paired that male to one of my violet Fischer female. Both the birds are whitespace. They have produced three chicks. To my surprise all three are parblue. The parents of the male were parblue but females are unknown. To my knowledge the parblue is dominant to blue in Fischer then how come I got parblue from normal blue fischers

  2. Johan says:

    Dirk, Can you please help me clearing something out, the eye colour of the NSL-ino in the “white eye ring” group lovebirds….is it also red like the Sexlink ino in Roies and indian ringnecks or not.

    Regards
    Johan.

  3. Umair Mujeeb says:

    HOW cAN i PRODUCE PARBLUE. Without Any Parblue Blood Line.
    From Lutino, Albino, DF violet or Other

  4. I am afraid this is impossible. You can not create a mutation. See my book Lovebird compendium on pag 177

  5. James Rodriguez says:

    Does your book tell on how to create mutations? Im interested on buying your book

  6. please read again:NOBODY can produce a mutation by mixing other mutations or phenotypes. That is not the way it works, a mutation either spontaneously arises in your collection and you can then purposefully keep breeding this, or you buy a mutation and use this one for further breeding. Creating your own mutation will not work.

  7. Arv313 says:

    Both my parents are parblue Fischer’s. Out of four offspring’s , two were parblue Fischer’s just like the parents and two were blue series Fischer ( one blue Fischer and one cobalt Fischer). The cobalt Fischer is a female. Do they carry the gene of parblue ? In other words are they considered as split to parblue ?

  8. No they are just blue.

  9. Pramod says:

    I would like to know if I pair a parblue with violet fisher, is there any chance to get parblue chicks in the nest straight away? Or the violet fisher need to have any allies of parblue i. Their gene?

  10. If you combine a turquoise x violet blue you will get TurquoiseBlue youngsters.
    Please read also this article: https://www.ornitho-genetics.info/?p=10644

  11. Naveed zafar says:

    Hello, I have Albino red eye female and Cobalt male. They give me mix motation. Like red eye albino and blue or cobalt chicks. My question is from their chicks how I can get red eye albino easily. Also know that when ever parents genrate chicks red eye albino will be a female.

  12. Adi says:

    Hello, can a have your email. I want send you a picture a chicks is called in indonesia is parjo (parblue jowo). My question its a parblue?

  13. Noel jalipa says:

    Hi I’m Noel my pairing are green split opaline split blue(df violet parblue) cock x green euwing opaline hen.
    Out of two offspring one is blue euwing parblue opaline(cock) and the one is violet parblue euwing(hen). How can a single parent carry a parblue mutation produce an offspring of two parblue?

  14. avu says:

    hi
    What do you propose to pair a Prablue between them or split and pair to Violet Dark Factor?

  15. Paul says:

    Sir does dark factor have effects when you pair it to parblue cause here in our country they beleive that pairng it like mauve fischer x parblue violet will produce better violet parblue color.

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