Genetic relationships between Atlantic and Pacific populations of the notothenioid fish Eleginops maclovinus: the footprints of Quaternary glaciations in Patagonia
| Autor: | Daniel Alfredo Fernández, Roberto Licandeo, Santiago Guillermo Ceballos, Enrique P. Lessa |
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| Rok vydání: | 2015 |
| Předmět: |
Gene Flow
0106 biological sciences Mitochondrial DNA ELEGINOPS MACLOVINUS GLACIATIONS Population MICROSATELLITES DNA Mitochondrial 010603 evolutionary biology 01 natural sciences Analysis of molecular variance Gene flow Ciencias Biológicas Evolution Molecular Genética y Herencia Human population genetics Genetics Animals education Alleles Phylogeny Genetics (clinical) education.field_of_study Geography Models Genetic biology 010604 marine biology & hydrobiology Eleginops maclovinus Bayes Theorem Sequence Analysis DNA South America biology.organism_classification Perciformes PATAGONIA Genetics Population Evolutionary biology Mantel test Microsatellite Original Article CIENCIAS NATURALES Y EXACTAS Microsatellite Repeats |
| Zdroj: | Heredity. 116:372-377 |
| ISSN: | 1365-2540 0018-067X |
| DOI: | 10.1038/hdy.2015.106 |
| Popis: | 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%; Po0.0001, analysis of molecular variance (AMOVA)) and low genetic differentiation between populations was observed (pairwise FST values ranged from 0 to 0.021). A Mantel test revealed a significant correlation between geographic distances and FST (r= 0.56, P= 0.047). This could be partially accounted by the Atlantic versus Pacific population differentiation detected in three different analyses (STRUCTURE, SAMOVA (Spatial Analysis of MOlecular VAriance) and a population phylogeny). The observed pattern is compatible with a history of separation into two glacial refugia that was better captured by the multilocus microsatellite data than by the mtDNA analysis. Fil: Ceballos, Santiago Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego; Argentina Fil: Lessa, E. P.. Universidad de la Republica; Uruguay Fil: Licandeo, R.. University Of British Columbia; Canadá Fil: Fernandez, Daniel Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego; Argentina |
| Databáze: | OpenAIRE |
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