White is not white: Recessive white in the discussion
White is not white, and that also holds to white with dark or bull
eyes. Usually white with 'bull eyes' are classified together and are
dealt with as recessive white. However, if we get insight into the
breeding pen we realize that they differ from each other. In this
presentation they differ also in the quality of the photos. The
first and better one is from Layne Gardner, the second one from the
Berlin Short Beaked Tumbler recessive white (photo Layne Gardner)
and white 'Konigsberg Tumbler' from a strain of Konigsberg Color
Heads, clean-legged and muffed
The first photo is a Berlin Short Beaked Tumbler, which falls as a
side-color of the Berlin Magpies. The other two whites at the right
are bred from Konigsberg Color Heads, which are recognized in the
German Standard as clean-legged or muffed and also as plain headed
Heterozygous Berlin Magpies
From a couple of these heterozygous magpies we regularly will get
some white flighted young and some bull-eyed whites.
From the hereditary endowment of these whites from Berlin Magpies
(and other breeds with this kind of magpie marking), it is possible
to mate them with white-flights to get magpies again. That is
indicated in Fig. 215 of 'Pigeon Genetics'.
Heterozygous Konigsberg Color Heads
A different code is anchored in the inheritance of the white
bull-eyed individuals from Konigsberg Tumblers. Two Color Heads
mated with each other regularly will produce some 'rose wings' and
bull-eyed whites. That is demonstrated in the photomontage at Fig.
532 in the German language book 'Genetik der Taubenfärbungen'.
The side colors mated together will produce color heads again. That
is sketched in Fig. 217 of 'Pigeon Genetics'.
Breeders of Konigsberg Tumblers appreciate not only the color heads,
but also the side colors and use them in the breeding pen. However,
the 'rose wings' seem to be preferred for that purpose.
Konigsberg Color Head and
yellow 'rose wing' at a top breeder of short beaked Tumblers
More recently, the genetics of recessive white has been puzzled
again in international discussion groups. Anyone who seeks a
satisfactory explanation for recessive white will have to offer a
satisfactory explanation for the bull-eyed white in the different
heterozygous magpies. Discussed are here heterozygous magpies and
Color Heads only, there exist some more heterozygous pied markings.
A discussion is given in German language in the book 'Genetik der
Taubenfärbungen' and in English language in 'Pigeon Genetics'.
Axel Sell, Pigeon Genetics. Applied Genetics in the Domestic Pigeon,
Axel Sell, Genetik der Taubenfärbungen, Achim 2015.
Axel Sell, Breeding and Inheritance in Pigeons, Hengersberg 1994.
Axel and Jana Sell, Vererbung bei Tauben, Reutlingen 2004, 2007.