Subject(s)
Attitude of Health Personnel , Midwifery , Pregnancy Outcome/psychology , Female , Humans , PregnancySubject(s)
Choice Behavior , Marketing of Health Services , Nurse Midwives , Patient Education as Topic , Female , Humans , PregnancyABSTRACT
The effects of the swine lymphocyte antigen (SLA) system on different performance traits were investigated in Swiss pig breeds. Litter size and piglet weight at birth and at weaning were considered and in gilts the average daily weight gain, backfat and muscle thickness as well as percentage valuable cuts were measured. These data were analysed with least squares procedures. Although the effect of SLA on these traits was very small, a few haplotypes seemed to have some influence. Sows of the Large White breed carrying H12 had a significant smaller and those with H24 had a bigger litter size at weaning. Some mating studies were performed to investigate the effects of SLA homozygosity. The obtained results suggest that this has a negative effect on the litter size, especially when H19 in the Large White breed and H7 in Landrace are involved.
Subject(s)
Genes, MHC Class I/physiology , Histocompatibility Antigens/physiology , Reproduction/immunology , Swine/genetics , Analysis of Variance , Animals , Birth Weight , Female , Gene Frequency , Haplotypes , Least-Squares Analysis , Litter Size , Weight GainABSTRACT
The first international comparison test on swine lymphocyte alloantigens (SLA) was held in Helsinki, Finland in July 1986. The results reported were based on a comparison of 157 alloantisera originating from six laboratories. The antisera were tested against a selected panel of 264 lymphocyte samples belonging to four laboratories. The most common breeds in Europe were chosen for this first comparison test (Landrace and Large White). Eighteen of the 31 previously known specificities were confirmed and a new nomenclature was established.
