SNPs across time and space: population genomic signatures of founder events and epizootics in the House Finch (Haemorhous mexicanus).

ABSTRACT: Identifying genomic signatures of natural selection can be challenging against a background of demographic changes such as bottlenecks and population expansions. Here, we disentangle the effects of demography from selection in the House Finch (Haemorhous mexicanus) using samples collected before and after a pathogen-induced selection event. Using ddRADseq, we genotyped over 18,000 SNPs across the genome in native pre-epizootic western US birds, introduced birds from Hawaii and the eastern United States, post-epizootic eastern birds, and western birds sampled across a similar time span. We found 14% and 7% reductions in nucleotide diversity, respectively, in Hawaiian and pre-epizootic eastern birds relative to pre-epizootic western birds, as well as elevated levels of linkage disequi

SUBMITTER: Shultz AJ 

PROVIDER: S-EPMC5513257 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature