I dont quite get your statement.. F1 roosters is as good candidate to create Delaware patterned birds as a F2 silver barred rooster..
here is why..
the F1 will be E/eWh(E coming from BR parent, not good on this project) B/b+(Barring gene from BR Parent, need it on this project) S/s+(golden, S from Barred Rock parent, need it on this project)..
when crossed to NH hens you will get 50 percent eWh/eWh birds(from NH parent, need it on this project) 50 percent silver wheaten columbian hens(this hens are Delaware patterned at this stage) 50 percent Red barred columbian roosters(not need it on this project and need to be culled) and 50 percent golden(S/s+) Barred Columbian patterned roosters(just like delawares but with a golden tone instead of silver, this birds are keepers) at this stage you can do sibling crossing because we have stablished Homozygosity for eWh/eWh B/-(on hens) and Co/Co...
any other genetic question just let me know
You get F2 that are silver columbian barred heres Kathys yellow biddies (wheaten) out of the F1xF1 cross she got quite a few Del atterned males and a very few silver columbiam females
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