>> 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.
>
Mike,
I read that the original German bees were not really mean but that it
was the crosses with Italian bees in the mid 1800s that turned out mean.
Adrian
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