Increasing efficiency in production of cloned piglets

Area of Science:

• Animal Biotechnology
• Reproductive Biology
• Genetics

Background:

• Low efficiency in obtaining piglets from cloned embryos poses a significant challenge in animal biotechnology.
• Previous methods often resulted in suboptimal outcomes, necessitating improvements in embryo selection and transfer protocols.

Purpose of the Study:

• To enhance the efficiency of obtaining piglets from cloned embryos.
• To optimize in vitro culture and embryo transfer strategies for cloned pig production.

Main Methods:

• Extended in vitro culture (5-6 days) of cloned pig embryos for improved selection.
• Reduction in the number of embryos transferred per recipient sow.
• Standardized and optimized cloning protocol using diverse pig breeds and cell types.

Main Results:

• Achieved a stable rate of approximately 41% transferable embryos after in vitro culture.
• Maintained a high pregnancy rate of around 90%.
• Reduced embryo transfer numbers from ~80 to 40 per recipient without decreasing the overall efficiency of ~14% (piglets born per embryo transferred).

Conclusions:

• In vitro culture and selection of high-quality embryos significantly increase piglet production efficiency.
• Reducing embryo numbers per recipient and transferring to more recipients optimizes resource utilization (personnel, time, material).
• This refined approach is crucial for advancing transgenic pig development for disease modeling.