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Selection for sow longevity.

T Serenius1, K J Stalder

  • 1Department of Animal Science, Iowa State University, Ames, 50011, USA. Serenius@iastate.edu

Journal of Animal Science
|April 4, 2006
PubMed
Summary
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Sow longevity is crucial for piglet production efficiency. Research indicates sufficient genetic variation exists for selection, but optimal breeding value estimation methods require further study, especially for multiple traits.

Area of Science:

  • Animal Genetics
  • Quantitative Genetics
  • Swine Breeding

Background:

  • Sow longevity is vital for economic piglet production, yet it's underutilized in breeding programs.
  • Limited research exists on genetic parameters and breeding value estimation for sow longevity.
  • Defining and measuring sow longevity varies across studies.

Purpose of the Study:

  • To summarize current knowledge on sow longevity genetics.
  • To discuss available breeding value estimation methods for sow longevity traits.
  • To highlight areas for future research in sow longevity selection.

Main Methods:

  • Review of existing literature on sow longevity genetics.
  • Analysis of sow longevity as continuous (productive lifetime) and binary (stayability) traits.

Related Experiment Videos

  • Discussion of statistical models including proportional hazard models and survival analysis.

    • Main Results:

    • Sow longevity exhibits sufficient genetic variation (heritability 0.02-0.25) for selection.
    • Longevity is genetically correlated with prolificacy and leg conformation.
    • Survival analysis offers superior modeling but limits multi-trait analysis.

    Conclusions:

    • Effective selection for sow longevity is possible due to genetic variation.
    • Consensus on optimal breeding value estimation methods is lacking.
    • Future research should focus on multi-trait analyses and nonadditive genetic effects for sow longevity.