>
> > I also suspect that thy to select for multiple factors (say t. mites and
> v. mites) at the same time may be nearly impossible.
Biological evolution does not understand the concept of "impossible." The
numerous surviving matrilines of feral bees in North America certainly
suggest that selection for resistance to both mites is not impossible.
--
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com
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