Essays about: "QTL"

Showing result 16 - 20 of 23 essays containing the word QTL.

  1. 16. Candidate genes and bioinformatic analysis of biological pathways for epistatic regulation of growth in chicken

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

    Author : Muhammad Ahsan; [2010]
    Keywords : complex traits; QTL mapping; SNP; mutation; divergent selection; KEGG; UCSC; Ensembl; Galaxy; GO; conservation;

    Abstract : Selective breeding programmes for desired phenotypes in animals provide a good resource for researchers to understand the genetic basis underlying those phenotypes. Most traits of economic importance in animals are quantitative traits, which are controlled by genetic as well as environmental factors. READ MORE

  3. 17. The honesty of the female sexual ornament in Gallus gallus

    University essay from Zoologi

    Author : Sara Rydmell; [2010]
    Keywords : AIL; comb; egg; fecundity; female ornamentation; honest; QTL;

    Abstract : Sexual selection was defined by Darwin in 1871 as selection acting solely on reproduction success. It is known to act on males resulting in extravagant ornamentations or other attributes, but in recent years more studies have shown that sexual selection also act on females. READ MORE

  4. 18. Genetisk bakgrund och avelsstrategier mot osteochondros hos hästar

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

    Author : Sunniva Elwing; [2010]
    Keywords : osteochondros; selektionsstrategi; arvbarhet; quantitative trait loci; avel; oteochondrosis; breeding; selection strategies; quantitative trait loci; heritability;

    Abstract : Osteochondros (OC) och osteochondrosis dissekans (OCD) är en störning i den indirekta, endochondrala bentillväxten hos unga snabbt växande hästar. När prestationskraven på hästen ökar vid en högre ålder kan det leda till att den utvecklar hälta. Flera studier har visat att ostechondros har en genetisk komponent. READ MORE

  5. 19. Correlations between fearfulness and social behaviours in an F7 intercross of red junglefowl and White Leghorn layers

    University essay from Institutionen för fysik, kemi och biologi

    Author : Johanna Karlsson; [2009]
    Keywords : Aggression; correlations; fearfulness; intercross; leghorn layers; red junglefowl; sociality; weight.;

    Abstract : The aim of this thesis was to study chickens of an F7 intercross between red junglefowl and White Leghorn layers in five behavioural tests to see if there were any correlations between traits in the intercross. 80 animals were used (40 males, 40 females); they were tested in a tonic immobility test, an open field, a fear of human test, an aggression test and lastly a sociality test. 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