In test-day (TD) models, records from individual test days are used to determine lactation
production instead of aggregating records. Test-day models have recently gained …

Data from Australian Holstein–Friesian cattle on calving interval (CI), survival (Surv), mean
milk yield (MY), mean fat yield (FY), mean loge somatic cell count (LnSCC) and the …

This review examines the potential for extended lactations on Victorian dairy farms in the
context of (i) the advantages and disadvantages of existing seasonal milk production …

Current selection objectives for dairy cattle breeding may be favouring cows that are
genetically predisposed to mobilize body tissue. This may have consequences for fertility …

The purpose of the present study was to investigate the influence of strain of Holstein–
Friesian (HF) cow and feeding system (FS) on the lactation curve characteristics of spring …

Persistency was defined as the predicted milk production 180 d after peak divided by peak
production (in%). Heritability of persistency in a multitrait analysis including parities 1 …

Simple Summary The New Zealand dairy sheep industry is relatively new, and more studies
are needed to support New Zealand dairy sheep farms for more efficient production. The …

Genetic parameters for milk, fat, and protein yield and persistency in the first 3 lactations of
Polish Black and White cattle were estimated. A multiple-lactation model was applied with …

A conversion formula was developed to convert the genetic covariance matrices of daily
yields and of random regression coefficients between 305-d and 335-d production periods …

Daily, stage and lactation estimated breeding values (EBV) and the shape of the lactation
curve for each cow are controlled by a unique set of random (genetic) regression coefficients …