Sökning: "kalvningsegenskaper"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet kalvningsegenskaper.

  1. 1. 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

  3. 2. Dystocia in Swedish beef cattle : effects of different scoring systems on the genetic evaluation

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

    Författare :Filip Nilsson; [2019]
    Nyckelord :Swedish beef cattle; residuals; genetic evaluation; normal score; beef breeding;

    Sammanfattning : In Swedish beef cattle breeding, the genetic evaluation comprises calving traits, carcass traits and growth traits. For the calving traits stillbirth, birth weight and dystocia severity grade are recorded. LÄS MER

  4. 3. Calving ease and stillbirth in dairy herds using beef and dairy breed bulls

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

    Författare :Patricia Gullstrand; [2017]
    Nyckelord :crossbreeding; dairy; beef; calving ease; stillbirth;

    Sammanfattning : The aim of this study was to evaluate the effect of different sire breeds on calving traits when used in dairy herds. Records from 1,423,851 calvings from 1990-2016 were collected from the Swedish milk recording scheme from Swedish Holstein, Red dairy cattle, Hereford, Charolais, Aberdeen Angus, Limousin and Simmental sires mated with Swedish Holstein, Red dairy cattle or crossbred dams. LÄS MER

  5. 4. Optimal användning av köttrassemin i svenska mjölkkobesättningar

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

    Författare :Lowa Göransdotter; [2015]
    Nyckelord :köttraskorsning; köttrassemin; mjölkkor; nötkött; nötköttsproduktion; beef crossing; dairy cows; beef breeds; beef; beef production;

    Sammanfattning : Inom den svenska mjölkbranschen är användandet av köttrassemin i mjölkkobesättningar ett hett diskussionsämne för tillfället. Mjölkpriset är lågt och det sänker priset på dräktiga kvigor. LÄS MER

  7. 5. Orsaker till kalvningssvårigheter och dödfödslar hos SLB och SRB

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

    Författare :Linnea Stolt; [2013]
    Nyckelord :Dödfödslar; kalvningssvårigheter; orsaker; korrelationer; SLB; SRB;

    Sammanfattning : Difficult calvings and stillborn calves are costly for the producer and lowering these frequencies can decrease the costs for the dairy operation. Each calving in the herd is registered by the farmer and stored in a central database. LÄS MER