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A Strategy To Exploit Surrogate Sire Technology in Livestock Breeding Programs.

Paolo Gottardo1, Gregor Gorjanc1, Mara Battagin1

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Surrogate sire technology can significantly boost genetic gain in animal breeding programs. A three-stage strategy involving genomic and progeny testing of elite donors is most effective for maximizing this potential.

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Area of Science:

  • Animal breeding and genetics
  • Reproductive technologies
  • Genomic selection

Background:

  • Conventional animal breeding programs face limitations in accelerating genetic gain.
  • Surrogate sire technology offers a novel approach to amplify genetic progress by utilizing elite male donors.

Purpose of the Study:

  • To develop and evaluate strategies for implementing surrogate sire technology in animal breeding.
  • To quantify the potential genetic gain achievable with surrogate sire technology compared to conventional methods.

Main Methods:

  • Computer simulations were conducted with 100 replicates for various scenarios.
  • Scenarios varied in elite donor identification and utilization strategies.
  • A three-stage strategy (genomic test, two progeny tests) was evaluated.

Main Results:

  • Surrogate sire technology can increase genetic merit by 6.5 to 9.2 years' worth of gain.
  • A three-stage selection strategy proved most effective among those tested.
  • The use of a few elite donors drastically differs from current breeding practices.

Conclusions:

  • Surrogate sire technology holds significant potential for accelerating genetic improvement in livestock.
  • A multi-stage testing strategy is crucial for optimizing donor selection and utilization.
  • Practical implementation requires careful consideration of associated risks and opportunities.