Rydhmer, Lotta
- Department of Animal Biosciences, Swedish University of Agricultural Sciences
Abstract
Genetic trends in maternal abilities were studied in French Large White sows. Two lines representing old-type and modern-type pigs were obtained by inseminating modern sows with semen from boars born in 1977 or 1998. Successive generations were produced by inter-semating. The maternal performance of sows from the second generation was compared in farrowing crates. Video analysis was performed for the 1st h after the onset of 43 and 36 farrowing events, and for the 6 first hours for 23 and 21 events, in old-type and modern-type sows, respectively. Genetic trends were estimated as twice the difference in estimates between the 2lines. The contribution of behavior to the probability of stillbirth and piglet death in the first 2days was estimated as the percentage of deviance reduction (DR)due to the addition of behavior traits as factors in the mortality model. Sow activity decreased strongly from the 1st to the 2nd h in both lines (P
Keywords
maternal behavior; piglet vitality; farrowing; genetic trend; sow
Published in
Frontiers in Genetics
2014, volume: 5, article number: 410
Publisher: Frontiers Research Foundation / Frontiers Media
SLU Authors
UKÄ Subject classification
Genetics and Breeding in Agricultural Sciences
Publication identifier
- DOI: https://doi.org/10.3389/fgene.2014.00410
Permanent link to this page (URI)
https://res.slu.se/id/publ/66496