Breeding for varroaresitance has turned out to be almost impossible. A better way is to keep bees in a natural way and let them swarm. Regarding diseases connected with varroa - the most severe disease in Europe -  and varroaresistance, we reported in several articles, books and courses:

Articles:
What's new from Beescience? Part 2 - German study group of bee research institutes inc. stands up for adapted local bees (2003)

Online-Magazines:
recently published scientific research and practical advices on this topic can be found in our quarterly magazine
Apiculture

2006 February 6
Centre for Ecological Apiculture