Genome-wide characterization of adaptation and speciation in tiger swallowtail butterflies using de novo transcriptome assemblies.

ABSTRACT: Hybrid speciation appears to be rare in animals, yet characterization of possible examples offers to shed light on the genomic consequences of this unique phenomenon, as well as more general processes such as the role of adaptation in speciation. Here, we first generate transcriptome assemblies for a putative hybrid butterfly species, Papilio appalachiensis, its parental species, P. glaucus and P. canadensis, and an outgroup, P. polytes. Then, we use these data to infer genome-wide patterns of introgression and genomic mosaicism using both phylogenetic and population genetic approaches. Our results reveal that there is little genetic divergence among all three of the focal species, but the subset of gene trees that strongly support a specific tree topology suggest widespread sharing of gen

SUBMITTER: Zhang W 

PROVIDER: S-EPMC3698933 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature