Assuming:
- Fish A has bright colors but regular shape, and fish B has a tall body profile but dull color.
- Some of the progenies from a AxB cross have bright colors AND tall body profile (could happen in the first generation, or it might take two generations to see this combination).
How would you propagate this line to preserve bright color + taller body profile (i.e. what do you cross these fish to)?
This has to do with how deleterious alleles can be fixed by piggybacking on beneficial alleles when there's a strong selection pressure, but I want to know a little more about your plan before commenting on it.
- Fish A has bright colors but regular shape, and fish B has a tall body profile but dull color.
- Some of the progenies from a AxB cross have bright colors AND tall body profile (could happen in the first generation, or it might take two generations to see this combination).
How would you propagate this line to preserve bright color + taller body profile (i.e. what do you cross these fish to)?
This has to do with how deleterious alleles can be fixed by piggybacking on beneficial alleles when there's a strong selection pressure, but I want to know a little more about your plan before commenting on it.