The structural impact of implementing Optimal Contribution selection in a commercial pig breeding population

David Howard, Ricardo Pong-Wong, Pieter W Knap, V D Kremer, John Woolliams

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study represents the first analysis of the structural changes occurring in a commercial population following the implementation of Optimal Contribution (OC) selection. It was shown that after OC selection, the estimated Mendelian sampling term (a_hat) becomes an important determinant for whether an individual made a long-term genetic contribution (r) to the population, as well as for determining the magnitude of that contribution. This provides the first practical validation of published theoretical predictions, in particular that the selective advantage underlying OC is derived from the inclusion of a_hat for making selection decisions. This validation is important as genomic evaluation will increase accuracy, in part through greater accuracy of a_hat, and demonstrates that genomic evaluation combined with OC has the potential to deliver more genetic gain for the same rate of inbreeding.
Original languageEnglish
Title of host publicationProceedings, 10th World Congress of Genetics Applied to Livestock Production
Publication statusPublished - Aug 2014
EventProceedings, 10th World Congress of Genetics Applied to Livestock Production - Canada, Vancouver, Canada
Duration: 17 Aug 201422 Aug 2014

Conference

ConferenceProceedings, 10th World Congress of Genetics Applied to Livestock Production
Country/TerritoryCanada
CityVancouver
Period17/08/1422/08/14

Keywords

  • Optimal contributions
  • long-term genetic contribution
  • estimated breeding value
  • estimated Mendelian sampling term
  • porcine

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