The "Ask Anything" to Nicalandia Thread

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So much to learn, thank you for bearing with me! I think I got a few lines crossed in what I wrote, my ultimate goal is green speckled eggs.

Parent Line A: Welsummer Heritage (speckling eggs is my goal so I think that makes these the most important line)
Parent Line B: Blue Americauna

A) Would it be correct then that it should be:

F1: Welsummer male x Blue Americauna Female
F2: F1 male x F1 female
BC1A: F1 male x Welsummer female

B) Does that mean there is also a BC2A concept (etc) and it goes:
BC2A: F2 male x Welsummer female

Yes, that sounds very good

Thinking on this again... does it matter if BC1A is F1 male x PA female versus PA male x F1 female?
 
Do you know if the speckling gene(s) are associated with any other gene? Trying to learn to use the calculator but I don't see an egg description. I know the blue egg color is often tied to the pea comb gene. Would speckling have something similar or is it more like the brown which is multiple genes?
It's part of the Polygenic nature of the brown egg shell expression, there are multiple genes involved
 

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