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Lack of molecular genetic divergence between sea-ranched and wild sea trout (Salmo trutta) by S. Palm; J. Dannewitz; T. Järvi; E. Petersson; T. Prestegaard; N. Ryman is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract The supportive breeding programme for sea trout (__Salmo trutta__) in the River Dalälven, Sweden, is based on a sea‐ranched hatchery stock of local origin that has been kept ‘closed’ to the immigration of wild genes since the late 1960s (about seven generations). In spite of an apparent potential for substantial uni directional gene flow from sea‐ranched to wild (naturally produced) trout, phenotypic differences with a presumed genetic basis have previously been observed between the two ‘stocks’. Likewise, two previous studies of allozyme and mitochondrial DNA variation based on a single year of sampling have indicated genetic differentiation. In the present study we used microsatellite and allozyme data collected over four consecutive years, and tested for the existence of overall genetic stock divergence while accounting for temporal heterogeneity. Statistical analyses of allele frequency variation (__F__‐statistics) and multilocus genotypes (assignment tests) revealed that wild and sea‐ranched trout were significantly different in three of four years, whereas no overall genetic divergence could be found when temporal heterogeneity among years within stocks was accoun

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Author

S. Palm; J. Dannewitz; T. Järvi; E. Petersson; T. Prestegaard; N. Ryman

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley; Research Square (ISSN 0962-1083)

Published

2003

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)