Backyard Hobby
Chirping
It would be more of a hobby project. If anything, my goal would be to just create a better meat bird for roosters I can't use. Marans have superior meat taste, but Bielefelders grow very quickly. May toss in some Barbezieux later on to further improve flavor and see what I get. Thanks for the infoYes, you will get black sexlinks. The black pullets are not useful for working toward an autosexing strain, but the cockerel could be bred back to the biel hens. Some intensive selection over a few generations would get you to a true autosexing chicken. If you are doing this for fun and learning, it would make a great project. If you are trying to create an autosexing dark egg layer, you would do much better to get one of these breeds that already does that:
Golden Cuckoo Marans - Crele colored, autosexing Marans
Welbars - Crele Welsummer, fully autosexing
Thanks!Perhaps this article will help answer your questions:
https://www.google.com/amp/s/scratchcradle.wordpress.com/2012/08/26/gms9-autosexing-recipe/amp/
lays out the process of creating an autosexing chicken pretty thoroughly and i found it very informative.