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not unless the Splash has a White gene normally White Marans are recessive whites and are from Cuckoos though of course you can breed in other colors so who knows what color you would get. It seems hard enough to breed them why mix colors unless you just want yard mutts because egg color is likely to suffer also when you cross them.....
I asked this question for for one to understand the genetic aspect of it. So they from cuckoos, interesting. So if you bred them back to cuckoos you would get some white and some cuckoo? Again, trying to understand the genetics of it all. I am also asking this to find out if there is good breeding to do to get better egg color as I understand the whites tend to have a lighter egg.
My White who was hatched from a 7 egg was lucky to lay an 4 her hatch mates all lay 5/6 right now after 6 months of laying not all whites are from Cuckoos but getting whites from barred birds is not unusual. Here is a chart from Chris9 that will help you with the barring genetics
*Cuckoo/Barred (Sex-linked Dominant)
Cuckoo (B/B) + Cuckoo (B/B) = all cuckoo
Black male + Cuckoo female = females black (non barring), males cuckoo (B/b) -carrying non-barring/black
Cuckoo (B/B) male + Black female = all cuckoos, all males (B/b) -carrying non-barring/ black
Cuckoo (B/b -carrying non-barring/black) male + Black female = of males: 50% Cuckoo [B/b -all carrying non-barring/black], 50% Black, of females: 50% Cuckoo, 50% Black
Cuckoo (B/b -carrying non-barring/black) male + Cuckoo female = of males: 50% Cuckoo, (B/b -carrying non-barred/black, 50% pure Cuckoo (B/B), of females: 50% Cuckoo, 50% Black.
more from Chris9 on recessive White
DILUTERS OF BLACK AND GOLD
cc -- Recessive white --Changes both black and red to white. Working with recessive white can be tricky as it "white washes" a bird. It may have the phenotype of a totally different color or even a nonstandard color underneath the white. The only way to determine what the white is hiding is to mate it to a black bird. You can get barred, polecats, etc.
info on Splash
Blue to Blue = 50% Blue, 25% Splash, 25% Black
Splash to Blue = 50% Blue, 50% Splash
Splash to Black = 100% Blue
Splash to Splash = 100% Splash
Blue to Black = 50% Blue, 50% Black
Black to Black = 100% Black