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Genetic divergence at the NAD +-dependent malic enzyme locus in Atlantic salmon from Europe and North America
Authors:E Verspoor  E McCcarthy
Institution:SOAEFD Marine Laboratory, P. O. Box 101, Aberdeen, AB11 9DB, Scotland
Abstract:The distribution of genetic variation for NAD+ malic enzyme ( ME* ) polymorphism in the Atlantic salmon was assessed in both anadromous and resident populations. The analysis revealed a major allelic divergence between North America and Europe. The *80 variant occurred in 39 of 40 North American samples, ranging in frequency from 0 to 0.515. In contrast, it was detected in only three fish from two of the 35 European locations analysed. Eleven fish from two rivers in north-west France had the * 110 variant. While heterogeneity among North American populations was significant, no regional differentiation was apparent and anadromous and resident salmon were not found to differ.
Keywords:Atlantic salmon  allozymes  population variation
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