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Development of ten new EST-derived microsatellites in Atlantic cod (Gadhus morhua L.)

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Conservation Genetics ; Volume 8. p. 1503–1506. 2007

Westgård, J. I.; Tafese, Tekle; Breiland, Mette Serine Wesmajervi; Nilsen, F.; Fjalestad, K.T.; Damsgård, Børge; Delghandi, Madjid

Ten polymorphic microsatellite markers were developed from approximately 1,300 expressed sequence tags (ESTs) of Atlantic cod (Gadus morhua L.). Thirty two primer pairs were designed for EST sequences containing perfect di- tri- tetra- and pentanucleotide motifs and characterised in 96 unrelated fish. Ten markers were successfully amplified with number of alleles from 2 to 13 per locus and observed and expected heterozygosity ranging from 0.03 to 0.69 and 0.03 to 0.74, respectively. Loci Gmo-C131, C132 and C136 deviated from Hardy-Weinberg equilibrium. Genetic linkage disequilibrium analysis between all pairs of the loci showed significant departure from the null hypothesis between loci Gmo-C131 and Gmo-C132 and C128 and Gmo-C133. The gene identity was determined at five of the loci, confirming the associated microsatellites as Type I markers. The new microsatellites reported in this work can be used for conservation and enhancement of wild stocks for commercial harvesting.

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