They are all genetic traits. I think you mean simple genetic traits such as recessive, dom, codom. Polygenic are controlled by multiple genes.
There are many breeders who line breed for polygenic traits. Breeding for lighter or darker colors is one example. It's not X + X= Y, but you'll have lighter or darker clutches on average that becomes more pronounced as you refine your line over time. Normals all look different and such traits can be a factor when deciding which normal to pair up a with certain morphs.
It would be difficult for a bp breeder to market such a polygenic trait as a named morph though they are pretty common descriptors. Many of the different lines present for some morphs are probably the influence of polygenic traits.
Reply With Quote