Patterns of Population Structure and Introgression Among Recently Differentiated Drosophila melanogaster Populations.

ABSTRACT: Despite a century of genetic analysis, the evolutionary processes that have generated the patterns of exceptional genetic and phenotypic variation in the model organism Drosophila melanogaster remains poorly understood. In particular, how genetic variation is partitioned within its putative ancestral range in Southern Africa remains unresolved. Here, we study patterns of population genetic structure, admixture, and the spatial structuring of candidate incompatibility alleles across a global sample, including 223 new accessions, predominantly from remote regions in Southern Africa. We identify nine major ancestries, six that primarily occur in Africa and one that has not been previously described. We find evidence for both contemporary and historical admixture between ancestries, with admix

SUBMITTER: Coughlan JM 

PROVIDER: S-EPMC9641974 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature