Abstract: The present invention provides a genetically-modified non-human animal whose somatic and germ cells contain an exogenous gene encoding a recombinant fusion protein, wherein the presence, and expression, of said recombinant fusion protein renders said genetically-modified non-human animal sterile. Tools for generating such sterile genetically-modified non-human animal as well as methods of use thereof are also provided.

Abstract: Methods and compositions for transposon-mediated transgenesis are provided herein. In some embodiments, methods are provided for generating a transgenic embryo containing a piggyBac-like transposon. In some embodiments, such methods can include: contacting a nucleic acid containing a transgene flanked by two terminal repeats with one of the group consisting of: a piggyBac-like transposase polypeptide and a nucleotide sequence encoding a piggyBac-like transposase to form a mixture; contacting the mixture with a sperm to form a composition; and introducing the composition into an unfertilized oocyte to form a transgenic embryo, wherein the piggyBac-like transposase catalyzes the integration of the transgene into the genome of the embryo. In some embodiments, the piggyBac-like transposase can be encoded by a nucleotide sequence on the same nucleic acid containing the transgene. In some embodiments, the nucleic acid encoding the piggyBac-like transposase can be an mRNA.

Abstract: The invention provides methods for producing transgenic embryos and animals with a higher efficiency than presently available procedures based on Intracytoplasmic Sperm Injection (ICSI) of nucleic acid complexed with recombinase.