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Population Genomics of the Euryhaline Teleost Poecilia latipinna

Global climate change and increases in sea levels will affect coastal marine communities. The conservation of these ecologically important areas will be a challenge because of their wide geographic distribution, ecological diversity and species richness. To address this problem, we need to better un...

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Autores principales: Nunez, J. C. B., Seale, T. P., Fraser, M. A., Burton, T. L., Fortson, T. N., Hoover, D., Travis, J., Oleksiak, M. F., Crawford, D. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4559437/
https://www.ncbi.nlm.nih.gov/pubmed/26335684
http://dx.doi.org/10.1371/journal.pone.0137077
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author Nunez, J. C. B.
Seale, T. P.
Fraser, M. A.
Burton, T. L.
Fortson, T. N.
Hoover, D.
Travis, J.
Oleksiak, M. F.
Crawford, D. L.
author_facet Nunez, J. C. B.
Seale, T. P.
Fraser, M. A.
Burton, T. L.
Fortson, T. N.
Hoover, D.
Travis, J.
Oleksiak, M. F.
Crawford, D. L.
author_sort Nunez, J. C. B.
collection PubMed
description Global climate change and increases in sea levels will affect coastal marine communities. The conservation of these ecologically important areas will be a challenge because of their wide geographic distribution, ecological diversity and species richness. To address this problem, we need to better understand how the genetic variation of the species in these communities is distributed within local populations, among populations and between distant regions. In this study we apply genotyping by sequencing (GBS) and examine 955 SNPs to determine Sailfin molly (Poecilia latipinna) genetic diversity among three geographically close mangrove salt marsh flats in the Florida Keys compared to populations in southern and northern Florida. The questions we are asking are whether there is sufficient genetic variation among isolated estuarine fish within populations and whether there are significant divergences among populations. Additionally, we want to know if GBS approaches agree with previous studies using more traditional molecular approaches. We are able to identify large genetic diversity within each saltmarsh community (π ≈ 36%). Additionally, among the Florida Key populations and the mainland or between southern and northern Florida regions, there are significant differences in allele frequencies seen in population structure and evolutionary relationships among individuals. Surprisingly, even though the cumulative F(ST) value using all 955 SNPs within the three Florida Key populations is small, there are 29 loci with significant F(ST) values, and 11 of these were outliers suggestive of adaptive divergence. These data suggest that among the salt marsh flats surveyed here, there is significant genetic diversity within each population and small but significant differences among populations. Much of the genetic variation within and among populations found here with GBS is very similar to previous studies using allozymes and microsatellites. However, the meaningful difference between GBS and these previous measures of genetic diversity is the number of loci examined, which allows more precise delineations of population structure as well as facilitates identifying loci with excessive F(ST) values that could indicate adaptive divergence.
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spelling pubmed-45594372015-09-10 Population Genomics of the Euryhaline Teleost Poecilia latipinna Nunez, J. C. B. Seale, T. P. Fraser, M. A. Burton, T. L. Fortson, T. N. Hoover, D. Travis, J. Oleksiak, M. F. Crawford, D. L. PLoS One Research Article Global climate change and increases in sea levels will affect coastal marine communities. The conservation of these ecologically important areas will be a challenge because of their wide geographic distribution, ecological diversity and species richness. To address this problem, we need to better understand how the genetic variation of the species in these communities is distributed within local populations, among populations and between distant regions. In this study we apply genotyping by sequencing (GBS) and examine 955 SNPs to determine Sailfin molly (Poecilia latipinna) genetic diversity among three geographically close mangrove salt marsh flats in the Florida Keys compared to populations in southern and northern Florida. The questions we are asking are whether there is sufficient genetic variation among isolated estuarine fish within populations and whether there are significant divergences among populations. Additionally, we want to know if GBS approaches agree with previous studies using more traditional molecular approaches. We are able to identify large genetic diversity within each saltmarsh community (π ≈ 36%). Additionally, among the Florida Key populations and the mainland or between southern and northern Florida regions, there are significant differences in allele frequencies seen in population structure and evolutionary relationships among individuals. Surprisingly, even though the cumulative F(ST) value using all 955 SNPs within the three Florida Key populations is small, there are 29 loci with significant F(ST) values, and 11 of these were outliers suggestive of adaptive divergence. These data suggest that among the salt marsh flats surveyed here, there is significant genetic diversity within each population and small but significant differences among populations. Much of the genetic variation within and among populations found here with GBS is very similar to previous studies using allozymes and microsatellites. However, the meaningful difference between GBS and these previous measures of genetic diversity is the number of loci examined, which allows more precise delineations of population structure as well as facilitates identifying loci with excessive F(ST) values that could indicate adaptive divergence. Public Library of Science 2015-09-03 /pmc/articles/PMC4559437/ /pubmed/26335684 http://dx.doi.org/10.1371/journal.pone.0137077 Text en © 2015 Nunez et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Nunez, J. C. B.
Seale, T. P.
Fraser, M. A.
Burton, T. L.
Fortson, T. N.
Hoover, D.
Travis, J.
Oleksiak, M. F.
Crawford, D. L.
Population Genomics of the Euryhaline Teleost Poecilia latipinna
title Population Genomics of the Euryhaline Teleost Poecilia latipinna
title_full Population Genomics of the Euryhaline Teleost Poecilia latipinna
title_fullStr Population Genomics of the Euryhaline Teleost Poecilia latipinna
title_full_unstemmed Population Genomics of the Euryhaline Teleost Poecilia latipinna
title_short Population Genomics of the Euryhaline Teleost Poecilia latipinna
title_sort population genomics of the euryhaline teleost poecilia latipinna
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4559437/
https://www.ncbi.nlm.nih.gov/pubmed/26335684
http://dx.doi.org/10.1371/journal.pone.0137077
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