Data from: Genome-wide selection components analysis in a fish with male pregnancy

A major goal of evolutionary biology is to identify the genome-level
targets of natural and sexual selection. With the advent of
next-generation sequencing, whole-genome selection components analysis
provides a promising avenue in the search for loci affected by selection
in nature. Here, we implement a genome-wide selection components analysis
in the sex-role-reversed Gulf pipefish, Syngnathus scovelli. Our approach
involves a double-digest restriction-site associated DNA sequencing
(ddRAD-seq) technique, applied to adult females, non-pregnant males,
pregnant males and their offspring. An FST comparison of allele
frequencies among these groups reveals 47 genomic regions putatively
experiencing sexual selection, as well as 468 regions showing a signature
of differential viability selection between males and females. A
complementary likelihood ratio test identifies similar patterns in the
data as the FST analysis. Sexual selection and viability selection both
tend to favor the rare alleles in the population. Ultimately, we conclude
that genome-wide selection components analysis can be a useful tool to
complement other approaches in the effort to pinpoint genome-level targets
of selection in the wild.