Hi Ben,
In that topic it is written :
"2. Behaviour of heterozygocity vs homozygocity in partial mutants:
2.1. Recessive : Ex: pallid : heterozygous males appear as split pallid, homozygous birds appear as pallid, which is an incomplete mutation of SL-ino. Homozygous heteroallelic pallid-ino shows an intermedial phenotype confirming the character of partial mutation and co-dominance between both alleles. Another Ex : NSL-ino and
clearhead fallow behaving exactly in the same way but in autosomal chromosomes (few reports about the combo).
I made a "typing error" and I should have written :
"2. Behaviour of heterozygocity vs homozygocity in partial mutants:
2.1. Recessive : Ex: pallid : heterozygous males appear as split pallid, homozygous birds appear as pallid, which is an incomplete mutation of SL-ino. Homozygous heteroallelic pallid-ino shows an intermedial phenotype confirming the character of partial mutation and co-dominance between both alleles. Another Ex : NSL-ino and
bronze fallow behaving exactly in the same way but in autosomal chromosomes (few reports about the combo).
If the lutino birds you are getting from your clearhead fallow line are females it would mean that the cock is split SL-ino. If they were males both cock and hen must be split NSL-ino. Clearhead fallow (buttercup) is not an allele of the a locus ... but some reports point to a possible interaction of clearhead fallow and mutations of the a locus (pastel, bronze fallow and NSL-ino) concerning eye colour.
The other question: are they Indigo Violets or Turquoise Violets? Hard to answer. In my mind there are far more patched parblue alleles than Turquoise, Indigo or Saphire. I think that those are just morphotypes which have been "detected" according to the intensity of the yellow psittacin and the presence or not of read psittacin, but I am convinced that there are far more intermedial alleles. At present we could class par-patched morphotypes as follows, from higher to lower psittacin content:
Turquoise : red psittacin in heterozygous and homozygous birds.
Indigo : red psittacin only in homozygous birds (they look like a ligth heterozygous turquoise). The heterozygous birds ring is black and white.
Saphire : no red psittacin in either homozygous or heterozygous birds. The ring is black and white.
So, as you can see, you will be able to say that the bird is one or another morphotytpe only in adult males (to detect red psittacin presence), and only knowing if they are homozygous or heterozygous. If you keep in mind the possibility of combo between different alleles, and that probably there are more alleles than those corresponding to the described morphotypes ... the complexity increases rapidly. And if you add the possibility of a saturation threshold for the expressed patched psittacin, with some homozygous combo producing similar morphotypes ... it remains a big problem to know the genetics of any parblue bird without knowing the parents and the parents' parents phenotypes. This is the reason I think that we should describe/characterize patched mutations according to the heterozygous phenotypes, (or to both homozygous and heterozygous phenotypes), and not only according to homozygous phenotypes as it is made for most other mutations.
Regards
Recio