Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation.

ABSTRACT: Biological populations may survive lethal environmental stress through evolutionary rescue. The rescued populations typically suffer a reduction in growth performance and harbor very low genetic diversity compared with their parental populations. The present study addresses how population size and within-population diversity may recover through compensatory evolution, using the experimental adaptive radiation of bacterium Pseudomonas fluorescens. We exposed bacterial populations to an antibiotic treatment and then imposed a one-individual-size population bottleneck on those surviving the antibiotic stress. During the subsequent compensatory evolution, population size increased and leveled off very rapidly. The increase of diversity was of slower paces and persisted longer. In

SUBMITTER: Zhou DH 

PROVIDER: S-EPMC8293784 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature