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Multiple Mating But Not Recombination Causes Quantitative Increase in Offspring Genetic Diversity for Varying Genetic Architectures
Experimental studies that compared genetically diverse colonies produced by multiply-mated queens to genetically more homogeneous colonies that were produced by single-mated queens of the Western Honey Bee (Apis mellifera L) demonstrated that genetically diverse colonies were better at resisting bacterial disease [12] and less prone to severe fungal infestations [13]. Similarly, high genetic diversity in experimental honey bee colonies improves their homeostasis [14], communication, foraging, and general colony success [15], [16].
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0047220
Not really new news, just substantiates that 90 years of genetic isolation and line breeding has our American bees inbred and sick.
 
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