Impact of Trait Maximized on Sire Averages from Computerized Sire Selection

The Importance of Sire Selection

Genetics of Reproduction: Considerations for Sire Selection

genetic selection to improve economically important traits. Most recently, much of that progress has been through the implementation of expected progeny differences (EPDs). Expected progeny differences make it possible to compare the genetic merit of two or more animals for any number of traits. Most EPDs involve growth or carcass traits, because most producers are paid by the pound, or in some...

Potential Impact of Bovine Somatotropin on Dairy Sire Evaluation

Use of bovine somatotropin to increase product ion of milk and milk solids poses the problem of allocation within herd and implications for genetic evaluatat ion records with and without bovine somatotropin were simulated for different correlations between performance with and without t reatment and response to it. Resulting within-herd variances and accuracy and bias in sire evaluations were c...

Prediction of Average Daughter Performance from Sire Proofs for Use in Linear Programming Sire Profit Models

When linear programming is used to rank sires on daughter profits, coefficients of input are required for representative daughters of each sire. Within herdyear-season regressions of daughter's actual 305-day milk, fat percent, days open, 2-min milk yield adjusted for total yield, total milking time, and body weight at birth and first calving on sire's proofs for production, conformation, milki...

Application of controlling instruments for improvements in cow sire selection.

National estimated breeding values of bulls from 1998 through 2006 from 12 different German artificial insemination (AI) organizations were used to determine the differences in expected and realized selection intensities for cow sire selection, considering the total merit index as well as subindexes for production, conformation, somatic cell count, fertility, and functional herd life. The expec...