Sökning: "animal performance"
Visar resultat 1 - 5 av 183 avhandlingar innehållade orden animal performance.
1. Genetics of sow performance in piglet production
Sammanfattning : The aim of this thesis was to provide knowledge about the genetic relationships concerning sow performance in piglet production. During the last decades, selection in dam lines has focused on increasing litter size and piglet growth. Consequently, the demand on the sow to provide her piglets with enough milk increases. LÄS MER
2. Performance of Ankole and crossbred cattle in Rwanda
Sammanfattning : The general aim of this thesis was to evaluate how effective crossbreeding could be for increasing productivity in meat and milk production in Rwanda. This was done by assessing performance of Ankole (A) and its crossbreds with exotic breeds: Brown Swiss (B), Holstein Friesian (F), Jersey (J) and Sahiwal (S). LÄS MER
3. Sow reproduction and piglet performance in multi-suckling pens
Sammanfattning : Production systems with group housing of sows at different stages of production are increasing in Europe, as an effect of public demand for more animal welfare-friendly pig production. Some niche certified piglet production systems keep lactating sows with piglets in groups in multi-suckling pens. LÄS MER
4. Genetic Heteroscedasticity for Domestic Animal Traits
Sammanfattning : Animal traits differ not only in mean, but also in variation around the mean. For instance, one sire’s daughter group may be very homogeneous, while another sire’s daughters are much more heterogeneous in performance. The difference in residual variance can partially be explained by genetic differences. LÄS MER
5. Dissecting the genetics of athletic performance and conformation traits in horses
Sammanfattning : The overall aims of this thesis were to investigate the genetics of athletic performance and the level of inbreeding in Coldblooded trotters, as well as the genetics of conformation traits in Icelandic horses. In paper I, genomic-based inbreeding coefficients in Coldblooded trotters were estimated and compared with pedigree-based coefficients. LÄS MER