Abstract

Cytogenetic analysis of two local populations of sea trout (Salmo trutta) revealed a diploid chromosome number (2n) of 80 and a diploid chromosome arm number (NF) of 102. Two heteromorphic chromosome pairs were identified, based on Cbanding and DAPIand CMA3-staining: NOR-bearing pair 11 and metacentric pair 6. The study was designed to search for chromosome markers enabling separation of fish from one of the Pomeranian rivers (Slupia River) compared to those from the Vistula River. Frequencies of the heteromorphic chromosome pairs identified genetic differences between the two groups.

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