The disclosure provides a method of generating a sterile fish, crustacean, or mollusk. The method comprises breeding (i) a fertile hemizygous mutated female fish, crustacean, or mollusk with (ii) a fertile hemizygous mutated male fish, crustacean, or mollusk, selecting a female progenitor that is homozygous by genotypic selection, and breeding the homozygous female progenitor to produce the sterile fish, crustacean, or mollusk. The mutation disrupts the maternal-effect of a primordial germ cell (PGC) development gene and does not impair the viability, sex determination, fertility, or a combination thereof, of a homozygous progenitor. The disclosure also provides methods of making broodstock freshwater and seawater organisms for use in producing sterilized freshwater and seawater organisms, as well as the broodstock itself.

A movable aquafarming system is provided, including a vessel and a plurality of connected fish pens. The plurality of fish pens are arranged in a line, with a first fish pen of the plurality of fish pens being disposed closest to the vessel. The vessel is configured to be moored, and when moored the first fish pen is attached proximate to the vessel, and when the vessel is not moored the first fish pen is configured to attach to the vessel with a length of a tow line, whereby the vessel can tow the plurality of fish pens to a different location.

The present invention relates, inter alia, to processes for making modified fish zygotes or early-stage fish embryos (particularly salmon zygotes and salmon embryos). The invention also provides fish zygotes, fish embryos, juvenile fish, mature fish and sterile fish which are produced by the processes of the invention.

The present invention relates to the method and use of reef coral fluorescent proteins in making transgenic red, green and yellow fluorescent zebrafish. Preferably, such fluorescent zebrafish are fertile and used to establish a population of transgenic zebrafish and to provide to the ornamental fish industry for the purpose of marketing. Thus, new varieties of ornamental fish of different fluorescence colors from a novel source are developed.

Application of a fragment of an isolated nucleotide sequence in the construction of zebrafish without intermuscular bones. The nucleotide sequence is shown in SEQ ID NO:1. Gene mutation is performed by taking SEQ ID NO:1 as a target gene; the mutant F0 embryos are selected and cultured to adult fish; F0 mutant is hybridized with wild type zebrafish to generate an F1 embryos; sense mutant heterozygotes F1 is screened out and cultured to adult fish; and then F1 heterozygote self-crosses to generate F2 generation of three gene types, including homozygote, heterozygote, and wild type. Zebrafish without intermuscular bones is obtained by using a gene mutation method, which provided a basis for subsequent research on a molecular formation mechanism of fish intermuscular bones and the cultivation of economic fishes without intermuscular bone and possessed a basic research value and an application value in other economic aquaculture fish species.

The technology relates to a method for inducing cardiomyogenesis comprising administering a therapeutically effective amount of either or both of KLF1 and KLF2b to increase the level of KLF1 and/or KLF2b in the cardiomyocytes thereby inducing cardiomyogenesis.

The present invention provides compositions and methods for light-activated cation channel proteins and their uses within cell membranes and subcellular regions. The invention provides for proteins, nucleic acids, vectors and methods for genetically targeted expression of light-activated cation channels to specific cells or defined cell populations. In particular the invention provides millisecond-timescale temporal control of cation channels using moderate light intensities in cells, cell lines, transgenic animals, and humans. The invention provides for optically generating electrical spikes in nerve cells and other excitable cells useful for driving neuronal networks, drug screening, and therapy.

A new DNA knock-in approach is provided based on the usage of three single guide RNA (sgRNA) to increase the integration efficiency of donor DNA based on the CRISRP-Cas system. The approach uses a pair of universal sgRNAs complementary to the donor DNA and a single sgRNA that targets the locus of interest. In various embodiments, targeting is achieved by pre-forming a DNA:RNA:protein (DNA:RNP) complex in vitro and introducing the complex into the embryo or cells of interest either by microinjection or transfection.

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.

Provided herein are new compositions and methods for use in introducing transgenes into cells. The compositions are non-viral but achieve levels of transgene integration comparable to those obtained with viral-mediated methods, and can be used for targeted integration of a transgene at a specific genomic locus.