Interpretive Summary: Genomic analysis of mobility measures on 5-month-old gilts associated with structural soundness

By: Lexi M Ostrand, Lea A Rempel, Brittney N Keel, Warren M Snelling, Ty B Schmidt, Eric T Psota, Benny E Mote, Gary A Rohrer

If methods existed to identify gilts that will become lame in breeding herds, then these gilts could be redirected as market animals indirectly improving sow well-being, longevity, and increasing profitability. This study evaluated gilts (age 5 mo) and then observed those retained for breeding throughout their productive life. Data were collected from a pressure-sensing mat and from a week of video recording. Animals that were currently lame or were culled for poor leg structure tended to be less active, as determined by video data, took shorter strides, and had more variable step parameters, as determined by the pressure mat. Gilts that remained sound throughout production walked farther and made more turns in a day than retained gilts that later became lame. Genetic analysis indicated traits measured were moderately heritable and several genetic markers were identified which may be useful in selecting robust gilts capable of withstanding commercial environments. These objective measurements recorded on gilts at 5 mo of age have the ability to identify animals with poor leg structure prior to the development of lameness and can improve the longevity of current and future generations of breeding sows.

Read the full article in the Journal of Animal Science.