> Do any of you know of evidence that may support (or not) the notion that > the first crossing of un-related, low-aggression lines often results in > high aggression, which then dissappears (regardless of selection) in > subsequent generations. Well a data point of one, a hive of very nice Midnite bees I have swarmed and the new queen and whatever she mated with (possibly the Buckfast hive next door or another Buckfast hive in the area) has produced some of the meanest bees I've dealt with. I don't know about the result of the next generation; I plan to replace that queen. -Mike