Selection and sex-biased dispersal: the influence of philopatry on adaptive variation

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1 Marine Genomics Laboratory, Department of Life Sciences, Harte Research Institute, Texas A&M University - Corpus Christi, Corpus Christi, Texas, United States
2 University of North Florida, Jacksonville, Florida, United States
3 State University of New York at Stony Brook, Stony Brook, New York, United States
DOI
10.7287/peerj.preprints.1300v2
Published
Accepted
Subject Areas
Ecology, Evolutionary Studies, Genomics, Marine Biology
Keywords
male-mediated gene flow, localized adaptation, elasmobranchs, genome scan
Copyright
© 2015 Portnoy et al.
Licence
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ PrePrints) and either DOI or URL of the article must be cited.
Cite this article
Portnoy DS, Puritz JB, Hollenbeck CM, Gelsleichter J, Chapman D, Gold JR. 2015. Selection and sex-biased dispersal: the influence of philopatry on adaptive variation. PeerJ PrePrints 3:e1300v2

Abstract

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) collected, a species thought to exhibit female philopatry, from summer habitat 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.

Author Comment

This version now matches the peer-reviewed publication:

Portnoy, D. S., Puritz, J. B., Hollenbeck, C. M., Gelsleichter, J., Chapman, D. and Gold, J. R. (2015), Selection and sex-biased dispersal in a coastal shark: the influence of philopatry on adaptive variation. Molecular Ecology, 24: 5877–5885. doi: 10.1111/mec.13441

http://onlinelibrary.wiley.com/doi/10.1111/mec.13441/full

Supplemental Information

Supplemental Tables and Methods

DOI: 10.7287/peerj.preprints.1300v2/supp-1

Figure 1

Figure 1. Sampling of bonnethead sharks obtained off North Carolina (NC, blue), Florida Bay (FB, red), Tampa Bay (TB, orange) and Panama City (PC, yellow); with number of individuals sampled at each locality indicated, results of discriminant analysis of principle components for (A) putatively neutral N-SNP loci, (B) outlier O-SNP loci putatively under selection, with prior group membership defined by sample locality, and (C) outlier O-SNP loci putatively under selection, with prior group membership based on k-means clustering. D: Representative allele frequencies of three O-SNP loci (left to right, E66074, E109425, E106435) that contributed ~24% to the distribution of individuals along the X axis. Colours represent sample locations for all figures.

DOI: 10.7287/peerj.preprints.1300v2/supp-2