Assessing wild genetic background and parental effects on size of growth hormone transgenic coho salmon

Experiments examining potential impacts of growth hormone (GH) transgenesis in fish typically use a single source strain and do not address differential strains different genetic backgrounds. Here, we examine the effects differing backgrounds when reared culture on transgenic nontransgenic coho salmon (Oncorhynchus kisutch) produced by mating sires from rivers with dams origin. We found significant difference size between offspring originating various river systems British Columbia. This was independent differences transgenotypes (i.e., vs. offspring). However, or sire were relatively small compared to transgene, which consistent regardless Thus, results derived studies GH population can provide useful information for assessments other systems. has important implications risks introgression transgene into populations.