Digitale Bibliotheek
Sluiten Bladeren door artikelen uit een tijdschrift
 
<< vorige    volgende >>
     Tijdschrift beschrijving
       Alle jaargangen van het bijbehorende tijdschrift
         Alle afleveringen van het bijbehorende jaargang
           Alle artikelen van de bijbehorende aflevering
                                       Details van artikel 4 van 9 gevonden artikelen
 
 
  Joint Genetic Evaluation of Black-and-White Dairy Bulls in the Nordic Countries for Dairy Production Traits
 
 
Titel: Joint Genetic Evaluation of Black-and-White Dairy Bulls in the Nordic Countries for Dairy Production Traits
Auteur: Banos, Georgios
Philipsson, Jan
Gundel, Mats
Juga, Jarmo
Sander-Nielsen, Ulrik
Verschenen in: Acta agriculturae Scandinavica. Section A, Animal science
Paginering: Jaargang 44 (1994) nr. 3 pagina's 129-137
Jaar: 1994-08-01
Inhoud: Genetic ties between the Black-and-White dairy bull populations of Denmark, Finland and Sweden were investigated using pedigree records. Although direct ties were weak, substantial linkage existed via common exporting countries, namely Canada, Germany, the Netherlands and the USA. A joint evaluation of bulls progeny-tested in these three Nordic countries was feasible in the presence of data from the four exporting countries. National proofs of more than 35 000 bulls from these countries were then analyzed with a linear model to rank bulls across country for milk, fat and protein yields. Results from the international evaluation were consistent with results from individual national evaluations. National proofs of bulls whose semen had been imported into the Nordic countries were found biased upwards by an average 4-5%, resulting in a substantial over-estimation of the international proofs of foreign bulls. Excluding these records from the analysis did not affect the data connectedness. Joint Nordic evaluations should be calculated using data only from the country where bulls receive their first official proof.
Uitgever: Taylor & Francis
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

                             Details van artikel 4 van 9 gevonden artikelen
 
<< vorige    volgende >>
 
 Koninklijke Bibliotheek - Nationale Bibliotheek van Nederland