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Genetic aspects of embryo transfer
1Department of Animal Science University of California, Davis, CA 95616 USA.
Theriogenology
|January 1, 1980
Summary
Embryo transfer significantly boosts genetic gain in livestock, especially in beef cattle, but its impact is less than artificial insemination (AI). Careful management is needed to prevent inbreeding when using embryo transfer with AI.
Area of Science:
- Animal Science
- Reproductive Biology
- Genetics
Background:
- Artificial insemination (AI) is a primary tool for genetic improvement in livestock.
- Embryo transfer (ET) offers additional benefits for genetic gain and population management.
Purpose of the Study:
- To evaluate the impact of embryo transfer on genetic improvement rates across different species.
- To explore the role of ET in genetic research and conservation.
Main Methods:
- The study analyzes the potential genetic gain from ET in various livestock scenarios.
- It considers the combined effects of ET with AI and discusses implications for inbreeding.
Main Results:
- ET can increase genetic improvement by 5% to nearly 100%, with greater potential in beef than dairy cattle (less than 10% with effective AI).
- ET is valuable for rapidly increasing populations of specific genotypes and for research on reproductive interactions.
- Combined ET and AI can accelerate inbreeding, necessitating careful population management.
Conclusions:
- Embryo transfer is a valuable tool for enhancing genetic improvement, population expansion, and specialized research.
- Its effective use requires strategic integration with AI and attention to long-term population health to mitigate inbreeding.
- Future applications include germ plasm transfer, rare breed preservation, and establishing control populations.