A system for animal model evaluations has been developed for a workstation. Type traits of Holstein cows and bulls were evaluated using all records, including those in later herds. This application was tested on several computer workstations; best performance was achieved on a Sun Sparcstation 2....

Genotypes of 237 bulls for κ-casein (κ-CN) and β-lactoglobulin (β-LG) were identified. These bulls were in performance testing programmes in 1983, 1984 and 1985. Wt gain was computed from the difference in body wt between 90 and 360 days of age. Wt gain was fitted in an animal model containing...

A rat model was established to evaluate food pellet refusal induced by the presence of vomitoxin in certain concn. Male Sprague-Dawley rats were housed individually in an isolated operant conditioning chamber and obtained food ad lib. by pressing a lever on an FR-1 schedule. After a training...

5149 Ayrshire and 10 525 Jersey bulls born in the USA and Canada between 1950 and 1985 were ranked for genetic merit for milk and milk fat yields. Ranking methods included USDA joint evaluation using combined lactation records from both countries (JE), linear model combination of animal model...

DAIRYBASE (dBASE), a personal computer program for individual animal inventory and herd management, was enhanced by implementing: 1. genetic merit values resulting from USDA animal model evaluations; 2. graphics for DHIA test-day values for daily milk yield, milk fat percentage, milk protein...

Genetic correlations of days open with yields of milk, fat and protein, and percentages of fat and protein were estimated from 31 641 1st-lactation records of 488 young and 75 proven sires using multivariate restricted max. likelihood fitted to a sire model accounting for relationships between...

Objective of this study was to model the evolution of the main nutritional events, and the milk yield and composition throughout a lactation. The metabolic subsystem was based on 8 state variables corresponding to 3 tissue (body fat, body protein liver, liner fat) and 5 plasma nutrient (glucose,...

Several outbreaks of apparent amine intoxication have occurred due to cheese consumption. Histamine, tyramine and tryptamine are 3 particularly important amines that have been found abundantly in cheese and other foods. To establish the toxicity of these amines, 2 animal model tests were performed. ...