Behavioral Evolution in the Red Fire Ant
The behavioral evolution in the red fire ant species, which has two distinct types of colonies —one with a single queen and one with multiple queens —has long puzzled biologists. An invisible border seems to exist between the two. The male ants quickly destroy the Queen ants that happen to wander between colonies. To understand what evolutionary mechanisms might be at play, molecular scientists have recently turned to the genome.
At Queen Mary University of London, a team of biochemists led by Rodrigo Pracana (pictured below) sequenced the whole genome in both colony types to examine the genetic difference between the two types of colonies – SB and Sb. Surprisingly, rather than finding “slight, successive changes” as predicted by Charles Darwin’s theory of evolution, they discovered the two genes to be “highly divergent” from each other.
