Fascinating! I have thought a lot about dog temperaments. I love dogs, have owned several and wouldn't mind betting they can inherit the canine form of bp too. Pit bulls bred for fighting would show that trait.
I used to think all dogs were wonderful and the only bad ones were due to owners mistreatment. We adopted a pitbull mutt. He was very loved and cared for, like a member of the family, which I've since learned is NOT the way to treat a strong willed dog. BUT, the problem was his hair trigger bite. He finally bit our youngest son, who was a toddler at the time. He required stitches in his face, missing his eye by half an inch! We put that dog down, which was very traumatic for our family, but we couldn't let him bite anyone else. Our next dog was a Cocker Spaniel, but she was a neurotic mess who peed if you even looked at her. Our best dog was a West Highland Terrier. He had a beautiful temperament and that's what they're known for. He was not too agressive, or timid and never bit!