Beurteilung der Konstitution von Milchkühen anhand der Ausprägung ihrer wesentlichen arttypischen Eigenschaften

TL;DRAbstract

Over the past 40 years, dairy cow breeding has led to very high yielding cows (more than doubled average annual milk yields in most dairying countries), but also to a deterioration in cow health, fertility and longevity (Pryce et al. (1999)). Consequently, many breeding organizations all over the world are seeking to include functional traits in their breeding programmes (Groen et al. (1997), Christensen et al. (1998)). A great amount of research is done on potential index traits for indirect selection for health traits (Groen et al. (1997)). The whole constitution of the animals is to some extent considered in Scandinavian breeding programmes using the epidemiological data of all herd book animals (Philipsson et al. (2000)) and in breeding for life time dairy performance (Haiger (2000)). Our working hypothesis is that animal constitution has to do with the intensity of their species-specific character and expression. We propose to develop an evaluation model by comparing the vertebr

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