Genetic relationships between Atlantic and Pacific populations of the notothenioid fish Eleginops maclovinus: the footprints of Quaternary glaciations in Patagonia

The genetic relationships between the Pacific and the Atlantic populations of marine coastal biota in Southern South America have been analyzed in few studies, most of them relying on a single mitochondrial locus. We analyzed 10 polymorphic microsatellite loci, isolated from a dinucleotide-enriched...

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Bibliographic Details
Published in:Heredity 2016-04, Vol.116 (4), p.372-377
Main Authors: Ceballos, S G, Lessa, E P, Licandeo, R, Fernández, D A
Format: Article
Language:English
Subjects:
Alleles
Animal populations
Animals
Bayes Theorem
Biota
DNA, Mitochondrial - genetics
Eleginops maclovinus
Evolution, Molecular
Fish
Gene Flow
Genetics
Genetics, Population
Geography
Glaciers
Latitude
Microsatellite Repeats
Mitochondrial DNA
Models, Genetic
Original
Perciformes - genetics
Phylogeny
Population differentiation
Quaternary
Refugia
Sequence Analysis, DNA
South America
Spatial analysis
Studies
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Summary:The genetic relationships between the Pacific and the Atlantic populations of marine coastal biota in Southern South America have been analyzed in few studies, most of them relying on a single mitochondrial locus. We analyzed 10 polymorphic microsatellite loci, isolated from a dinucleotide-enriched Eleginops maclovinus genomic library, in a total of 240 individuals (48 from each of 5 sampled sites: 2 Atlantic, 2 Pacific and 1 in Beagle Channel). The results were contrasted against a previous work on the same species with mitochondrial DNA (mtDNA). Observed heterozygosity within localities ranged from 0.85 to 0.88 with the highest overall number of alleles observed at the northernmost locality on the Pacific side (Concepción), but no clear geographic pattern arose from the data. On the other hand, the number of private alleles was negatively correlated with latitude (Spearman's rs test, P=0.017). Among-population variance was low but significant (1.35%; P
ISSN:0018-067X
1365-2540
DOI:10.1038/hdy.2015.106