Phylogenomics Reveals Three Sources of Adaptive Variation during a Rapid Radiation.

ABSTRACT: Speciation events often occur in rapid bursts of diversification, but the ecological and genetic factors that promote these radiations are still much debated. Using whole transcriptomes from all 13 species in the ecologically and reproductively diverse wild tomato clade (Solanum sect. Lycopersicon), we infer the species phylogeny and patterns of genetic diversity in this group. Despite widespread phylogenetic discordance due to the sorting of ancestral variation, we date the origin of this radiation to approximately 2.5 million years ago and find evidence for at least three sources of adaptive genetic variation that fuel diversification. First, we detect introgression both historically between early-branching lineages and recently between individual populations, at specific loci whose func

SUBMITTER: Pease JB 

PROVIDER: S-EPMC4752443 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature