No severe genetic bottleneck in a rapidly range-expanding bumblebee pollinator

Ryan Edward Brock, Liam Crowther, David Wright, David Richardson, Claire Carvell, Martin Taylor & Andrew Bourke
Genetic bottlenecking can limit the success of populations colonising new ranges. However, successful colonisations can occur despite bottlenecking, a phenomenon known as the genetic paradox of invasion. Eusocial Hymenoptera such as bumblebees (Bombus spp.) should be particularly vulnerable to genetic bottlenecking, since homozygosity at the sex-determining locus leads to costly diploid male production. The Tree Bumblebee (B. hypnorum) has rapidly colonised the UK since 2001 and has been highlighted as exemplifying the genetic paradox of...
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