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Gene expression patterns in Atlantic salmon Salmo salar: gene expression during osmoregulation in intestine tissue

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Ireland has the world's largest stocks of wild Atlantic salmon. A better understanding of gene expression will benefit conservation of wild stock as well as salmon aquaculture. We describe the PRTLI project designed to advance the fundamental understanding of the genome of Atlantic Salmon Salmo salar. The major objective is to create the first comprehensive database of gene expression and functional information using cDNA libraries and Microarray technology. One key area of interest to salmon biology is osmoregulation, which is critical to the ability of salmon to adapt in seawater. Tissues implicated in this process are the gills, intestine and skin. To initiate studies, SSH (suppression subtractive hybridization) libraries were constructed from intestine RNA extracted from smolts sampled in January and May. A number of potentially interesting clones have been identified, among those a heat shock protein, hsp90 in the reverse library. Others SSH libraries from various tissues (pituitary, hypothalamus, brain, gill, intestine, head kidney and spleen) have also been constructed and will be used to construct a 5000 clone microarray slide. This slide will then be used to elucidate gene expression profiles in various tissues. Further sample collection has been carried out to answer questions regarding biologicaldifferences between one‐ year and two‐year old parr and wild and hatchery smolt.
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Document Type: Research Article

Affiliations: 1: National Diagnostics Centre, NUI, Galway, Ireland; 2: Marine Institute, Furnace, Newport, Ireland; 3: Department of Zoology, NUI, Galway, Ireland).

Publication date: 2004-12-01

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