Studies on A. I. Dairy Sire Provings: I. Importance of various recorded characteristics

2010 ◽  
Vol 87 (1-4) ◽  
pp. 292-298
Author(s):  
Ulf Lindström ◽  
Kalle Maijala
Keyword(s):  
Dairy Sire

scholarly journals Effect of Heterogeneity of Variance on Dairy Sire Evaluation

1988 ◽  
Vol 71 (11) ◽  
pp. 3033-3039 ◽  
Author(s):  
A. Winkelman ◽  
L.R. Schaeffer
Keyword(s):  
Sire Evaluation ◽  
Heterogeneity Of Variance ◽  
Dairy Sire

scholarly journals Profit-Maximizing Dairy Sire Selection Package

1988 ◽  
Vol 20 (1) ◽  
pp. 141-144 ◽  
Author(s):  
Robert W. Blake ◽  
C. Richard Shumway ◽  
Michael A. Tomaszewski ◽  
Greg P. Rickard ◽  
John M. LaBore
Keyword(s):  
Net Present Value ◽  
Planning Horizon ◽  
Economic Factors ◽  
Objective Functions ◽  
Present Value ◽  
Herd Management ◽  
C Language ◽  
Performance Factors ◽  
Microcomputer Program ◽  
Dairy Sire

AbstractThe Net Present Value Sire Summary Professional Package (NPVSS) is a microcomputer program designed for technical personnel to help dairy producers better manage investments in genetic improvement. NPVSS is written in C language, utilizes the MS-DOS operating system, and requires 256K of RAM. It is menu driven and includes parameter screens to define herd management characteristics of individual producers. Profit rankings of bulls can be generated to evaluate alternative: a) objective functions (selection policies for genetic merit in milk income and type scores), b) herd management performance factors (conception rate, calving interval, age at first calving), and c) economic factors (milk price, semen price, discount rate, planning horizon).

A note on the properties of the cumulative difference method for sire evaluation

1976 ◽  
Vol 23 (1) ◽  
pp. 121-124 ◽  
Author(s):  
L. Dempfle
Keyword(s):  
Difference Method ◽  
Evaluation Methods ◽  
Sire Evaluation ◽  
Genetic Level ◽  
Cumulative Difference ◽  
Dairy Sire

SUMMARYSeveral of the various dairy sire evaluation methods now in use account for the genetic level of contemporary herdmates. In the cumulative difference method of Bar-Anan and Sacks the contemporary comparison estimate is first calculated and then adjusted by taking into account the genetic level of the contemporaries. These estimates depend on the genetic level of the herdmates. A modification of the procedure in which account is taken of the herdmates' genotype before regressing for small numbers would remedy this deficiency without increasing computing costs.

A DAIRY SIRE PROGENY TEST

1934 ◽  
Vol 25 (5) ◽  
pp. 177-182 ◽  
Author(s):  
B. L. WARWICK ◽  
O. C. COPELAND
Keyword(s):  
Progeny Test ◽  
Dairy Sire
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