Sökning: "sire"

Visar resultat 1 - 5 av 24 uppsatser innehållade ordet sire.

  1. 1. Heritability of litter size in the Swedish population of Shetland sheepdogs

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Annika Eleryd; [2022]
    Nyckelord :dog; breeding; litter size; inbreeding; heritability; Shetland sheepdog;

    Sammanfattning : The Shetland sheepdog is one of the most common canine breeds in Sweden and the demand for puppies is arguably high on the Swedish market. However, the continuously small litter sizes (mean of 3.0-3.4) in the population have been a cause for concern. LÄS MER

  3. 2. How does a beef x dairy calving affect the dairy cow’s following lactation period?

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Roberto Espinola Alfonso; [2022]
    Nyckelord :beef cattle; dairy cattle; crossbreeding; milk yield; fertility; survival;

    Sammanfattning : In dairy x beef breeding, much of the research has focused on the performance of the crossbred calves, yet little focus has been given to the subsequent performance of the cow itself. This study aimed to evaluate the performance of dairy cows for milk yield, fertility, and survival traits after giving birth to crossbred calves, and to compare this to the performance of dairy cows after giving birth to purebred dairy calves. LÄS MER

  4. 3. Jämförelse av digivningsbeteende hos korsningssuggor : en pilotstudie

    Master-uppsats, SLU/Dept. of Animal Environment and Health

    Författare :Nellie Rosenwall; [2022]
    Nyckelord :Sugga; raskorsning; digivningsfrekvens; digivningslängd; beteende;

    Sammanfattning : Differences in breeding goals in pig production have led to maternal breeds have a higher selection pressure on reproductive traits and paternal breeds have been focused on meat quality. In maternal breeds, this has led to an increase in the number of born piglets, but this is not something that all farmers desire as this put pressure on both the sow and the farmer. LÄS MER

  5. 4. Comparing crossbred and purebred dairy cows for economically important traits

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Sofie Liedgren; [2022]
    Nyckelord :Crossbreed; Holstein; Montbéliarde; Jersey; Fertility; Production;

    Sammanfattning : The use of dairy x dairy crossbreeding as a breeding strategy has increased in Sweden, which has led to an increase of Brown Swiss, Jersey and Montbéliarde crosses. Multiple studies have been done on Montbéliarde and Jersey crossbreds in the USA but to our knowledge, no such study has been done on Swedish data. LÄS MER

  7. 5. Beskrivning och uppföljning av elitauktionsföl 2011-2020 inom svenskt varmblod

    Kandidat-uppsats, SLU/Dept. of Anatomy, Physiology and Biochemistry

    Författare :Agnes Dahlgren; Wilma Östlin; [2021]
    Nyckelord :Häst; SWB; föl; elitfölauktion;

    Sammanfattning : Varje år föds cirka 2500 svenska varmblodsföl och för att skapa ett forum för svenska elitföl där uppfödare och köpare kan mötas arrangeras SWB:s elitfölauktion, under SWB equestrian weeks varje höst. Idag finns ingen sammanställd statistik som beskriver vad som karaktäriserar de föl som selekteras till SWB:s elitfölauktion eller de föl som säljs till de högsta priserna. LÄS MER