Essays about: "avelsvärdering"

Showing result 16 - 20 of 25 essays containing the word avelsvärdering.

  1. 16. Avel för att uppnå ökad livslängd och hög livstidsproduktion hos mjölkkor

    University essay from SLU/Rural Buildings and Animal Husbandry (until 121231)

    Author : Elin Svensson; Magdalena Läggeberger; [2010]
    Keywords : livslängd; hållbarhet ; överlevnad; mjölkkor; livstidsproduktion; exteriöra egenskaper; funktionella egenskaper; avel;

    Abstract : De senaste 50 åren har man strävat efter att förbättra effektiviteten i mjölkproduktionen genom att genetiskt selektera för ökad mjölkmängd. Under den här tiden har mjölkavkastningen per ko mer än fördubblats. Detta har medfört fertilitets- och hälsoproblem samt en minskande livslängd hos de moderna mjölkkorna. READ MORE

  3. 17. International and national genetic evaluation of beef cattle : validation of national genetic evaluation models

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Jenny Ahlqvist; [2010]
    Keywords : beef; cattle; genetic; evaluation; international; models; Interbeef; charolais; limousin; data validation;

    Abstract : After a workshop in Kuopio held in June 2006, Interbull decided to go forward with the development of a system for beef international genetic evaluation and a three year project called Interbeef was launched in June 2007. The participating countries are so far limited to Europe and the only trait evaluated at present is adjusted weaning weight (weight at 200 days). READ MORE

  4. 18. Mjölkraskorsningar i avelsvärdering av tillväxt hos svenska köttrastjurar

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Ola Thomsson; [2010]
    Keywords : köttras; avelsvärdering; korsningar; genotyp miljö;

    Abstract : .... READ MORE

  5. 19. Kalvningsintervall hos svenska köttkor : finns det genetisk variation som kan användas i avelsarbetet?

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Maria Lennartsson; [2008]
    Keywords : kalvningsintervall; köttkor; genetisk variation; Charolais; Hereford;

    Abstract : The Swedish beef cattle population is growing when the dairy cattle become fewer. The fertility of the beef cows is important for the profitability in beef cattle production. Today there is no genetic evaluation for female fertility in Swedish beef cows. READ MORE

  6. 20. Possibilities to breed for internal parasite resistance in Swedish beef breeds

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Jenny Ahlqvist; [2008]
    Keywords : animal breeding; cattle; parasite resistance;

    Abstract : The aim of this review is to investigate the possibilities to breed for parasite resistance in the Swedish purebred beef population, with starting point in the organic production. The present population structure, breeding objectives and genetic evaluation will be discussed as well as four common internal parasites found among cattle in Sweden, registration of resistance by using faecal worm egg counts (FEC), the genetic background of FEC, and last the possibilities of using quantitative trait loci (QTL) and marker-assisted selection (MAS). READ MORE