Identification of an olfactory imprinting-related gene in the lacustrine sockeye salmon, Oncorhynchus nerka

The olfactory system of salmonids is essential for imprinting and the subsequent homing migration. Olfactory imprinting-related genes were identified in the olfactory system of 1- and 3-year-old lacustrine sockeye salmon (Oncorhynchus nerka) using a subtractive hybridization technique of representat...

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Bibliographic Details
Published in:Aquaculture 2007-12, Vol.273 (2-3), p.200-208
Main Authors: Hino, Hiroshi, Iwai, Toshiharu, Yamashita, Masakane, Ueda, Hiroshi
Format: Article
Language:English
Subjects:
Animal aquaculture
Animal productions
Aquaculture
Biological and medical sciences
Brackish
Deoxyribonucleic acid
DNA
Fish migration
Freshwater
Fundamental and applied biological sciences. Psychology
General aspects
Genes
Hybridization
Lacustrine sockeye salmon
Marine
Olfactory epithelium
Oncorhynchus nerka
Representational difference analysis
Salmon
Smell
Smolt
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Summary:The olfactory system of salmonids is essential for imprinting and the subsequent homing migration. Olfactory imprinting-related genes were identified in the olfactory system of 1- and 3-year-old lacustrine sockeye salmon (Oncorhynchus nerka) using a subtractive hybridization technique of representational difference analysis (cDNA-RDA). We have obtained a partial clone from a subtractive cDNA library of 1-year-old fish that contains a 756 bp open reading frame coding for a putative protein with 252 amino acid residues named the Sockeye salmon Olfactory system Imprinting related Gene (SOIG). By northern hybridization, the SOIG mRNA was only expressed in the olfactory epithelium and not in other tissues. In situ hybridization showed that the expression of SOIG mRNA was observed in the olfactory receptor cells and basal cells of the olfactory epithelium. This suggests that SOIG could have specific and important roles in olfactory system.
ISSN:0044-8486
1873-5622
DOI:10.1016/j.aquaculture.2007.10.003