I don't think brother Adam was the start of the mess, he was left with a very diminished gene pool and rebuilt from that. I don't think there can be any honey bee that has not had its genetics manipulated by man. You can't say Amm is a pure strain as it will have been selected continuously by different bee keepers for generations. It may be Amm, but Amm selected for certain traits like any other honey bee managed by man.
I have some excellent mongrels and their strain is very evident over successive seasons producing around 200lb per colony which is amazing in my area of about 60 decent foraging days a season, but its a very slow process embedding them into my stock. They are open mated and its not very easy to identify which will turn out best. Often I find that the queens that build the strongest in their birth year rarely turn out the best. Colonies that drag themselves into April with 3 frames of bees looking like they are dying can be 20 frames of brood and 5 supers by the end of May....LOL 2,000 eggs a day is another BBKA dogma.......
I also manage to raise colonies that never fill a brood box and only fill half a super, at least I am honest.
If Amm was brilliant nobody would be importing anything. There is a massive push to ban all bee imports so you better have a plan for the future Nigel mate, or a thicker bee suit
HAPPY NEW YEAR FOR 2022 TO YOU ALL.