Combined mutations
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Click on the photos to enlarge them photos Alain Campagne |
The French current name ROSE-JAUNE should be translated by Pink-yellow in English for that colour morph which results in fact of the Opaline and Pale Fallow combination. Known in Dutch as “LACHS” and under “PINK” name in English (which is a bit disturbing as pink = rose). In the international naming system it should be called OPALINE PALE FALLOW. It combines both recessive and sex-linked inheritance. The Fallow mutation reduces the melanin pigments making the colour lighter than in an Opaline, with paler brown coloured marks which disappear on the head and cheeks, giving a white face, strongly reduced on flights, with enhanced pink colour. The eyes are red , cheeks are white, general colour is lightened. |
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Click on the photo to enlarge it photo Alain Campagne |
Currently named “ROSE FALLOW” in French, that combination should be called OPALINE DUN FALLOW and results in a darker Opaline Fallow colour, which is mainly noticeable on the wing coverts. The eyes are dark red. Note: it seems that American breeders are using the one and only name of "Pink" for the Bronze Fallow Opaline, the Pale Fallow Opaline and the Cinnamon Opaline… which is a bit confusing. .
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Click on the photos to enlarge them photo Alain Campagne |
Also
known as RUBINO, it is the combination
of the Opaline and the Lutino which should be named OPALINE INO , but the
RUBINO name is well established now. It displays the same pink and yellow
psittacin pigments but maybe with predominance and enhancement of the pink colour, yellow remains on
secondary coverts while the primary coverts are white. Rubino is the name
universally used for that mutation.
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Click on the photo to enlarge it photo Alain Campagne |
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Click on the photo to enlarge it photo Julie Seatter (N.Z.) |
Combining both CINNAMON and LUTINO sex-linked mutations, the colour displays a typical yellow with pale brown shades. A breeder from New Zealand has been working for several years to establish a good line of Cinnamon and succeeded in producing that combination in 2006.
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photo J.
Smit (Nl.) |
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SELECTION and ODD COLOURS |
Click on the photos to enlarge them |
I think necessary to insist here on the extreme variability of the opaline mutant which can result in some very special colours by selective breeding . These colours can be very attractive although they are not officially recognized. However, genetically speaking, they should not be considered as new mutations, but as variations of the Opaline factor, without minimizing the work of these breeders. We can find some birds with deep yellow wings, spreading of the yellow psittacin pigment can result in a yellow back, sometimes tinged with orange and with greenish blue rump. In some birds these colours can change after moult and their inheritance is not always easily controlled. Some breeders have got such an extensive blue colour than the bird appears quite totally blue or greenish blue on back, until evidence to the contrary, it results also from selection of Opaline variations. I couldn't get enough information to tell more about their inheritance and classification. Naming these colours is not so easy,
some attractive names as “rainbow” are far away from genetics reality and
should be avoided. It sounds more accurate to choose names such as "blue opaline”
or “green opaline” referring to the mutant allele. |
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Click on the photos to enlarge them photos Alain
Campagne |
At last, some breeders have noticed that the wild type Bourkes sometimes have on rump and flanks a deeper blue colour tinged like violet. An unknown violet factor is possible and should be investigated. |
All the above is just to try to clarify
the situation about the Bourkes’ mutation known at the moment. It has to be
discussed and updated with the progress of our knowledge and breeding reports
together. I will appreciate any information and contact about that…what is true
today might not be to morrow! The new names proposed could end in an international naming system useful for all of us and deserve that we seriously try to use them. |
