>>But what you have to remember is that after a few years of using recessive traits, those same traits begin to appear agian in later generations
I agree, as long as your neighbours follow your breeding program.
Tell me how many queens are bred and sold into and around North America now. Many of the breeders arnt focusing on the SMR at all, but trying to exploite other traits for mite tolerance.
As I understand it, SMR and alot of the grooming hygenic behaviour traits arent related at all.