yeah you are alright .I wanted the Colombian from White Storm and a pure white too .now I got the impure Colombian and a Split white as first generation ( Cockerels )
for me now to breed the pure white from this split white F1 hybrid ,I need to mate them together as F1 X F1 to get a true F2 . in this generation 25% of them will be pure white .
For the Colombian ,I only needed the cockerels from this crossing .I know I ll no get the pullets .
pullets breeding is a different formula .
here how I m going to do it , now that I have 3 cockerels all impure Colombian . ER/EWh..S/s+, Db/db+
I m going to mate them to a F2 Silver Wheaten pullets to get a F3 pure Colombian EWh/EWh ,S/S ( S/-). DB/DB . cockerels and pullets.
from this F3 I ll select only the Colombian and breed them together forward to produce a F4 and F5 pure Colombian Marans Strain .
in the marans the Colombian is with less hackles marking .So it is based on the gene DB( Black tail ) Not the Co ( Colombian ) .
in French they call this variety HERMINEE' like the priest robe ( white with Black edging )
So the Maran Herminee ( Colombian ) should have a Black just on the bottom end of the hackle ( not all the way up the top like the sussex breed ) and black tail .
Breeding is fun and time consuming .
I do enjoy it .
breeding any variety from scratch is rewarding .
Chooks man