Chimeric gene constructs for generation of fluorescent transgenic ornamental fish
Four zebrafish gene promoters, which are skin specific, muscle specific, skeletal muscle specific and ubiquitously expressed respectively, were isolated and ligated to the 5′ end of the EGFP gene. When the resulting chimeric gene constructs were introduced into zebrafish, the transgenic zebrafish emit green fluorescence under a blue light or ultraviolet light according to the specificity of the promoters used. Thus, new varieties of ornamental fish of different fluorescence patterns, e.g., skin fluorescence, muscle fluorescence, skeletal muscle-specific and/or ubiquitous fluorescence, are developed.
1. A transgenic fish whose genome comprises a nucleic acid encoding a fluorescent protein operably linked to the nucleic acid sequence set forth by SEQ ID NO: 8 wherein said fluorescent protein is expressed at a level sufficient that said fish fluoresces upon exposure to a blue or ultraviolet light.
2. The transgenic fish of claim 1 , wherein the fish is an ornamental fish for the ornamental fish market, and wherein the transgenic fish is capable of breeding with ether a said transgenic fish or a non-transgenic fish to produce viable and fertile transgenic progeny.
3. The transgenic fish of claim 1 , wherein said fish and progeny of said fish emits green fluorescence when the whole fish is exposed to a blue or ultraviolet light.
4. The transgenic fish of claim 1 , wherein the transgenic fish is selected from a group consisting of medaka, goldfish, carp, koi, loach, tilapia, glassfish, catfish, angel fish, discus, eel, tetra, goby, gourami, guppy, Xiphophorus (swordtail), hatchet fish, Molly fish and pangasius.
5. The transgenic fish of claim 1 , wherein the transgenic fish is a zebrafish.
6. A transgenic fish whose genome comprises a transgene comprising a promoter consisting of the nucleic acid sequence set forth by SEQ ID NO: 8, wherein the promoter is operably linked to an exogenous gene encoding green fluorescent protein, wherein the fish is capable of breeding to produce viable and fertile transgenic progeny that express the exogenous gene, and wherein said fish and progeny of said fish emit green fluorescence when exposed to blue or ultraviolet light.