Abstract
Transgenic technology is one of the most hotspots in biology. In the past decade, the progress in animal cloning has provided an alternative method to improve transgenic efficiency. Many kinds of transgenic animals have been successfully produced via the combination of transfection and nuclear transfer. However, the ultimate aim of transgenesis is not to produce several transgenic animals, but to service for the needs of human. In animal production, transgenic technology has been used to breed new livestock, which has received a lot of attention in China. It has been evidenced that inheritance and expression instability of transgene in transgenic animals is still the major limitation, which is attributed to position effect, epigenetic modification, and hereditary efficiency of transgene. In this review, we discussed the three points for promoting the industrialization of animal transgenic breeding.
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