Genetic diversity of farmed and wild populations of Lithuanian stocks of Atlantic salmon
2002
Sauklyte, A. (Vytautas Univ., Kaunas (Lithuania)) | Kontautas, A. | Paulauskas, A.
The genetic diversity of Atlantic salmon from Lithuania was assessed using five micro satellite markers. The levels of heterozygosity and the average number of alleles per locus were estimated in farmed (67% and 8.4, respectively) and wild (78% and 6, respectively) populations. Farmed salmon showed less genetic variability than wild salmon in terms of overall heterozygosity, but not in terms of allelic diversity. A number of loci showed quite different allele frequency distributions between farmed and wild populations. The FST value (FST=0.1310) also indicated a strong genetic divergence between wild and farmed populations. Phylogenetic analysis using the shared allele method showed a clustering of individuals into two groups: farmed and wild. The genetic differences between the populations suggest that they must be treated as separate units in any management programme.
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