Even though the varroa issue is justification to fund a lot of expensive hi-tech study, I don't think achieving the goal is rocket surgery.
Establish a minimum for what you seek at maybe the median performance. Higher if you are in a hurry. .
Measure, and breed from those that pass. Rinse and repeat.
The wild card is nearby beekeepers. If it can be a community effort, it will progress. If not, it will likely fail.
AsI see it, this approach is a sort of an accelerated natural selection.
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html