Results from various selection experiments and field data as well as from Monte Carlo
studies and model calculations are reviewed to indicate some crucial features concerning …

The objective of this study was to review the current status of genetic evaluation systems for
production and functional traits as practiced in different Interbull member countries and to …

Clustered survival data are encountered in many scientific disciplines including human and
veterinary medicine, biology, epidemiology, public health and demography. Frailty models …

The purpose of this study was to assess the effect of lameness on dairy cow survival. Cox's
proportional hazards regression models were fitted to single-lactation data from 2520 cows …

In proportional hazards models, the hazard of an animal A (t), ie, its probability of dying or
being culled at time t given it is alive prior to t, is described as A (t)='>" o (t) eW'e where Ao (t) …

A whole-genome scan to detect quantitative trait loci (QTL) for functional traits was
performed in the German Holstein cattle population. For this purpose, 263 genetic markers …

The effects of 15 diseases on time until culling were studied in 39 727 Finnish Ayrshire cows
that calved during 1993 and were followed until the next calving or culling. The diseases …

The objectives of this study were to estimate the heritabilities for and genetic correlations
among resistance to bacterial cold-water disease and growth traits in a population of …

The objective of this study was to investigate factors that might influence the length of
productive life in Swedish crossbred (Landrace× Yorkshire) sows. The data set consisted of …

Knowledge of reproductive risk factors for culling is useful in making insemination and
culling decisions and helps motivate efforts to reduce or eliminate risk factors. The objective …