Negative frequency-dependent selection maintains coexisting genotypes during fluctuating selection.

ABSTRACT: Natural environments are rarely static; rather selection can fluctuate on timescales ranging from hours to centuries. However, it is unclear how adaptation to fluctuating environments differs from adaptation to constant environments at the genetic level. For bacteria, one key axis of environmental variation is selection for planktonic or biofilm modes of growth. We conducted an evolution experiment with Burkholderia cenocepacia, comparing the evolutionary dynamics of populations evolving under constant selection for either biofilm formation or planktonic growth with populations in which selection fluctuated between the two environments on a weekly basis. Populations evolved in the fluctuating environment shared many of the same genetic targets of selection as those evolved in constant biof

SUBMITTER: Turner CB 

PROVIDER: S-EPMC6952539 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature