Risk Ratio as parameter for the genetic characterization of new defined traits for mastitis of cattle [German]

摘要

The identification of economic trait loci promises new opportunities for genetic improvement in animal breeding. Additional gains are expected by including molecular genetic information in breeding programs. This is especially true for traits, for which the achievement of genetic progress by classical selection procedures is limited, like mastitis of cattle. One important prerequisite for successful mapping experiments is a precise trait definition, which reduces the environmental influence on the trait and increases its genetic determination. The risk ratio (lambda(R)), the recurrence risk for a relative of an affected individual compared to the prevalence of the trait in the general population, is a well suited parameter for the genetic characterization of binary traits even for comparatively small datasets.