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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Multiple SNP markers reveal fine-scale population and deep phylogeographic structure in european anchovy (Engraulis encrasicolus L.)
PLoS ONE, Volume 7, No. 7, Article e42201, Year 2012
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Description
Geographic surveys of allozymes, microsatellites, nuclear DNA (nDNA) and mitochondrial DNA (mtDNA) have detected several genetic subdivisions among European anchovy populations. However, these studies have been limited in their power to detect some aspects of population structure by the use of a single or a few molecular markers, or by limited geographic sampling. We use a multi-marker approach, 47 nDNA and 15 mtDNA single nucleotide polymorphisms (SNPs), to analyze 626 European anchovies from the whole range of the species to resolve shallow and deep levels of population structure. Nuclear SNPs define 10 genetic entities within two larger genetically distinctive groups associated with oceanic variables and different life-history traits. MtDNA SNPs define two deep phylogroups that reflect ancient dispersals and colonizations. These markers define two ecological groups. One major group of Iberian-Atlantic populations is associated with upwelling areas on narrow continental shelves and includes populations spawning and overwintering in coastal areas. A second major group includes northern populations in the North East (NE) Atlantic (including the Bay of Biscay) and the Mediterranean and is associated with wide continental shelves with local larval retention currents. This group tends to spawn and overwinter in oceanic areas. These two groups encompass ten populations that differ from previously defined management stocks in the Alboran Sea, Iberian-Atlantic and Bay of Biscay regions. In addition, a new North Sea-English Channel stock is defined. SNPs indicate that some populations in the Bay of Biscay are genetically closer to North Western (NW) Mediterranean populations than to other populations in the NE Atlantic, likely due to colonizations of the Bay of Biscay and NW Mediterranean by migrants from a common ancestral population. Northern NE Atlantic populations were subsequently established by migrants from the Bay of Biscay. Populations along the Iberian-Atlantic coast appear to have been founded by secondary waves of migrants from a southern refuge. © 2012 Zarraonaindia et al.
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC3408476/bin/pone.0042201.s001.docx
Authors & Co-Authors
Zarraonaindia, Iratxe
Spain, Leioa
Universidad Del Pais Vasco
Iriondo, Mikel
Spain, Leioa
Universidad Del Pais Vasco
Albaina, Aitor
Spain, Leioa
Universidad Del Pais Vasco
Pardo, Miguel A.
Spain, Derio
Azti Fundazioa
Manzano, Carmen
Spain, Leioa
Universidad Del Pais Vasco
Grant, William Stewart
United States, Juneau
Alaska Department of Fish and Game
Irigoien, Xabier
Spain, Derio
Azti Fundazioa
Saudi Arabia, Thuwal
King Abdullah University of Science and Technology
Estonba, A.
Spain, Leioa
Universidad Del Pais Vasco
Statistics
Citations: 71
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1371/journal.pone.0042201
e-ISSN:
19326203
Research Areas
Cancer
Genetics And Genomics
Study Design
Cross Sectional Study