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Date: | Fri, 16 Jul 2021 10:24:40 -0600 |
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It is always good to think out of the box and a good reminder that we
tend to look for things that we are comfortable with. But here are two
sets of personal anecdotal unpublished observations that suggest some
strong genetic determination:
In Louisiana, it was common to see colonies from unselected queens
placed into nucs in the spring collapse loaded with mites by the late
summer or fall. At the same time, in the same yard, colonies with
queens from lineages selected for resistance to mites over several
generations survived and had very low mite loads.
In the Rockies, in the last five years our few colonies with selected
queens survive with no treatment, with low mites, while those started
by others, in the same area, if untreated collapse loaded with mites in
the second winter, loaded with mites.
One does not have to know what genes are involved. In fact, a devil's
advocate could argue that there are no genes involved, and that some
kind of mechanism is being passed on from generation to generation,
perhaps improved each time, in a heritable manner.
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