Creating substance
An ideal genotype is either pure or heavy with the traits you desire to constitute your bloodline’s type. The ideal substance is one that will enable the characteristics you want in your gamefowl to manifest in order for it to fulfill its function. Therefore you aim for seed fowl for the traits you want. You want breeding materials with the characteristics you desire.
We can’t make a seed fowl by breeding any pure of a bloodline to another pure of the same bloodline. Nor can we make a seed fowl by continuously inbreeding members of just any family. We can only make a seed fowl by continuously and repeatedly pairing individuals that possess the traits we desire, pure or not, inbred or not, related or not these individuals might be.
For example by breeding individuals with high flying ability we may end up with a bloodline with members possessing high flying abilities. Same with consistently breeding power to power or speed to speed. The end result may be individuals heavy with those traits. Of course, when it comes to fighting ability, this principle is easier said than done.
Fighting ability is polygenic, dictated by so many different genes. For simple traits, we can aspire for pure. For traits that dictate fighting ability we cannot. An individual heavily packed with genes of the desired characteristics would suffice as a seed fowl for these characteristics. In polygenic and quantitative traits we aim for preponderance of positive traits.
Therefore, it is not a plausible goal to have a bloodline heavy with all the traits that make a good fighting rooster. In short you do not aspire for a seed fowl for all the traits. You create seed fowl for some particular traits. Then, breed these seed fowl with one another and hope that their respective traits will converge in your battle fowl.
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