00 29/03/2013 10:48
Hello from Australia. I have so much to share and write about. Presently I only have access to ipad which makes conveying messages phots other board links near impossible. I have been recreating the Sicilian Buttercup since 2004. 2005 spring I bred my first horned duplex fowl. It was hetrezygote with smooth beak, large tissue mass. This last year he made homozygote type, cavernous beak, small tissue mass mated to Gold pencilled hamburg.
Therefore one can make several conclusions, not withstanding the hamburg carries recessive genetics for horn duplex apprarance in rose comb. Cavernous beak is not eclusive to multiple homozygote horn duplex. Buttercup can make hoen. Buttercup to single will make buttercup. Hhorn to buttercup favours horn with some buttercup. Horn to single is a waste of time. Either duplex to rose gives multiple outcomes including redcap.
I have already named homozygote type horn fowl in australia Australian or Gold Huguenots (after the persecution of people In France during the reign of one particular French King 1600's. These displaced people known as Hugeunots settled in just about every country across Eorope and in England. With themthey took alltheir belongings, animals chickens etc. Especially noteable were the varieties we know today as Hamburg in their many colours..eg moonies in UK , pencilled in Netherlands.)

The French created La Fleche in similar way. Probably culled out the unreliably formed buttercup combed progeny. The germans filled the void with Augsburger of which notably, there are appearances of horn duplex as already stated.

Just because a comb has a particular appearance does not mean it is homozygote for that expression. Fixing horn or buttercup when bred to itself ss been an ongoing problem for breeders for centuries.