期刊
MOLECULAR ECOLOGY
卷 24, 期 23, 页码 5877-5885出版社
WILEY
DOI: 10.1111/mec.13441
关键词
elasmobranchs; genome scan; localized adaptation; male-mediated gene flow
资金
- College of Science and Engineering at Texas A&M University-Corpus Christi
- Environmental Protection Agency [R826128-01-0]
- United States Environmental Protection Agency
Sex-biased dispersal is expected to homogenize nuclear genetic variation relative to variation in genetic material inherited through the philopatric sex. When site fidelity occurs across a heterogeneous environment, local selective regimes may alter this pattern. We assessed spatial patterns of variation in nuclear-encoded, single nucleotide polymorphisms (SNPs) and sequences of the mitochondrial control region in bonnethead sharks (Sphyrna tiburo), a species thought to exhibit female philopatry, collected from summer habitats used for gestation. Geographic patterns of mtDNA haplotypes and putatively neutral SNPs confirmed female philopatry and male-mediated gene flow along the northeastern coast of the Gulf of Mexico. A total of 30 outlier SNP loci were identified; alleles at over half of these loci exhibited signatures of latitude-associated selection. Our results indicate that in species with sex-biased dispersal, philopatry can facilitate sorting of locally adaptive variation, with the dispersing sex facilitating movement of potentially adaptive variation among locations and environments.
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