The introduction of foreign DNA into the genome of livestock and its stable integration into
the germ line has been a major technical advance in agriculture. Production of transgenic …

The creation of transgenic livestock is a complex multistep procedure the successful
execution of which demands a high level of skill and application. Useful animals have been …

The introduction of specific genes into the genome of farm animals and its stable
incorporation into the germ line has been a major technological advance in agriculture …

Transgenic livestock came into existence in 1985 with the production of the first transgenic
pigs and sheep (Hammer et al., 1985). Since then, various technologies have been …

The production of transgenic cattle presents a number of unique challenges not
encountered in other species. First, the survival of microinjected zygotes is low; only 15% in …

The notion of directly introducing new genes or otherwise directly manipulating the genotype
of an animal is conceptually straightforward and appealing because of the speed and …

Techniques have been developed to introduce specific genes from one species into the
germplasm of another, including livestock. This paper reviews reports on evaluation …

Genetically engineered sheep and goats represent useful models applied to proof of
concepts, large-scale production of novel products or processes, and improvement of animal …

Transgenic research usually involves a large investment in carrying out a series of low-
efficiency steps to produce a few transgenic founder animals, and then characterizing a …

The overall efficiency of somatic cloning in cattle is still low. Many factors are necessary for
successful birth of live offspring. Among them, the source of donor cells reveals the …