parallel evolution

Paulose J, Hermisson J & Hallatschek O 2019 Spatial soft sweeps: patterns of adaptation in populations with long-range dispersal. PLoS Genet 15:e1007936.

• soft sweeps become likely when the time taken for an established mutation to fix in the entire population is long compared to the expected time for additional new mutations to arise and establish

• fixation is slowed down by the time taken for genetic information to spread through the range, making multi-origin sweeps more likely
• the detection of such a spatial soft sweep crucially depends on the sampling strategy