Re-evaluating Homoploid Reticulate Evolution in Helianthus Sunflowers.

ABSTRACT: Sunflowers of the genus Helianthus are models for hybridization research and contain three of the best-studied examples of homoploid hybrid speciation. To understand a broader picture of hybridization within the annual sunflowers, we used whole-genome resequencing to conduct a phylogenomic analysis and test for gene flow between lineages. We find that all annual sunflower species tested have evidence of admixture, suggesting hybridization was common during the radiation of the genus. Support for the major species tree decreases with increasing recombination rate, consistent with hybridization and introgression contributing to discordant topologies. Admixture graphs found hybridization to be associated with the origins of the three putative hybrid species (Helianthus anomalus, Helianthus de

SUBMITTER: Owens GL 

PROVIDER: S-EPMC9907532 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature