Distinction of saffron cod ( Eleginus gracilis ) from several other gadid species by using microsatellite markers

Nine microsatellite loci isolated in saffron cod ( Eleginus gracilis ) have potential applications for population genetics. Polymerase chain reaction products of samples of E. gracilis from northwestern Alaska amplified reliably, produced only one or two microsatellite bands, and had no apparent hom...

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Bibliographic Details
Published in:Fishery Bulletin
Main Authors: Sme, Noel, Lyon, Sarah, Canino, Michael, Chernova, Natalia, O’Bryhim, Jason, Lance, Stacey, Jones, Kenneth, Mueter, Franz, Gharrett, Anthony
Language:unknown
Published: 2021
Subjects:
59 BASIC BIOLOGICAL SCIENCES
Arctic
Arctic Ocean
Bering Sea
Gulf of Alaska
Pacific
Navaga
Arctic cod
Boreogadus saida
Kodiak
Alaska
Online Access:http://www.osti.gov/servlets/purl/1512504
https://www.osti.gov/biblio/1512504
https://doi.org/10.7755/fb.116.1.6
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Summary:Nine microsatellite loci isolated in saffron cod ( Eleginus gracilis ) have potential applications for population genetics. Polymerase chain reaction products of samples of E. gracilis from northwestern Alaska amplified reliably, produced only one or two microsatellite bands, and had no apparent homozygote excess. A collection of E. gracilis sampled in the Gulf of Alaska (GOA) near Kodiak Island did not amplify reliably at one locus, and allele frequency profiles clustered distinctly (with principal component analysis [PCA]) from the northwestern Alaska collection. Northwestern Alaska and GOA E. gracilis collections were genetically different (on the basis of a standardized genetic differentiation measure [ G ' ST ]=0.313, chord distance [ D chord ]=0.078, P<0.0001) and differed in expected aver-age heterozygosities at shared loci (0.859 and 0.689, respectively). We tested the microsatellite primers on other gadid species endemic to the northern Pacific Ocean, Bering Sea, and Arctic Ocean for cross-species amplification. Not all loci amplified reliably in navaga ( E. nawaga ), Pacific tomcod ( Microgadus proximus ), Arctic cod ( Boreogadus saida ), Pacific cod ( Gadus macrocephalus ), or walleye pollock ( G. chalcogrammus ). Reliable loci varied in microsatellite size profiles and produced distinct PCA clusters and accurate genotype assignments that allowed accurate species identification. Furthermore the identifications support previous morphological and genetically determined systematic classifications and distinguished the geographically separated collections of E. gracilis .

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