Domestication reshaped the genetic basis of inbreeding depression in a maize landrace compared to its wild relative, teosinte.

ABSTRACT: Inbreeding depression is the reduction in fitness and vigor resulting from mating of close relatives observed in many plant and animal species. The extent to which the genetic load of mutations contributing to inbreeding depression is due to large-effect mutations versus variants with very small individual effects is unknown and may be affected by population history. We compared the effects of outcrossing and self-fertilization on 18 traits in a landrace population of maize, which underwent a population bottleneck during domestication, and a neighboring population of its wild relative teosinte. Inbreeding depression was greater in maize than teosinte for 15 of 18 traits, congruent with the greater segregating genetic load in the maize population that we predicted from sequence data. Parent

SUBMITTER: Samayoa LF 

PROVIDER: S-EPMC8722731 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature