The Population Genetics of Evolutionary Rescue in Diploids: X Chromosomal versus Autosomal Rescue.

ABSTRACT: Most population genetic theory assumes that populations adapt to an environmental change without a change in population size. However, environmental changes might be so severe that populations decline in size and, without adaptation, become extinct. This "evolutionary rescue" scenario differs from traditional models of adaptation in that rescue involves a race between adaptation and extinction. While most previous work has usually focused on models of evolutionary rescue in haploids, here we consider diploids. In many species, diploidy introduces a novel feature into adaptation: adaptive evolution might occur either on sex chromosomes or on autosomes. Previous studies of nonrescue adaptation revealed that the relative rates of adaptation on the X chromosome versus autosomes depend on the d

SUBMITTER: Unckless RL 

PROVIDER: S-EPMC7252526 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature