The Blue Silver Laced Orpington Bantam is another truly stunning colour created here at Keithsorps.
This has been a long term breeding project with the original cross in 2000 of a Silver Laced Bantam cockerel over a Blue Orpington Bantam hen. Subsequently each year since then I have crossed the offspring of this mating with the Silver Laced to improve the definition of the lacing and now finally in 2015 I am happy with the quality of the birds to release them for sale.
Against the contrast of the Silver Laced Orpington the Blue Silver laced is a more delicate pastel colour.
As with any other Blue based Orpington a pure Blue breeding pen will not breed all Blue offspring.
Creating the Blue Silver Laced Orpington has proved valuable to the breeding of the Silver Laced Orpington in the UK as up until now all the Silver Laced Orpingtons bred in this country are all descended from the strain created by Bob Follows in the late 90's.
THE SILVER IN THE BLUE SILVER LACED IS A SEX LINKED DOMINANT GENE
In poultry the sex of any chick is determined by the hen not the cockerel. The cockerel carries two Z chromosomes so he is ZZ. The hen carries one Z chromosome and one W chromosome so she is ZW.The cockerel must pass one of his Z chromosomes onto his offspring so any sex linked genes that are on that chromosome such as Silver, Bantam, Barring and Chocolate will be inherited. The hen can pass either her Z or her W chromosome on to her offspring. If she passes her Z chromosome on her chicks will be male and they will inherit all the sex linked genes that are on that Z chromosome but if she passes her W chromosome on, her chicks will be female and they will inherit none of the sex linked genes she is carrying. Genes that are sex linked can only be carried on the male chromosome.
THE BLUE GENE
The Blue gene is an incomplete dominant gene which means that if a bird has inherited one Blue gene from one of it's parents then it will be Blue but if it is pure for the Blue gene and has inherited two Blue genes ( one from each of it's parents ) then it will be Splash.
So Splash is actually the pure breeding form of Blue and therefore will breed true so Splash mated to Splash will always breed Splash
It is believed that the more Black that is present in the genetic make up of an individual bird the darker the shade of Blue.
Black x Blue
= 50% Black / 50% Blue
Blue x Blue
= 25% Black / 50% Blue / 25% Splash
Black x Splash
= 100% Blue
Blue x Splash
= 50% Blue / 50% Splash