Interbull Routine Genetic Evaluation for Conformation Traits
International genetic evaluations for conformation traits of Brown Swiss, Guernsey, Holstein, Jersey and Red Dairy Cattle bulls from Australia, Belgium, Canada, Czech Republic, Denmark, Estonia, France, Finland, Germany, Hungary, Italy, Japan, the Netherlands, Norway, New Zealand, Poland, Rep. of South Africa, Spain, Sweden, Switzerland, the United Kingdom, and the United States of America were computed in this evaluation.
New data (national genetic evaluations) included in this evaluation compared to the routine run in August 2007:
Changes in the Interbull procedures
Data and method of analysis
Data were national genetic evaluations of AI sampled bulls
with daughters in at least 10 herds. Table 1,
table 2, table 3,
table 4 and table 5
presents the amount of data included in this Interbull evaluation for Brown
Swiss, Guernsey, Holstein, Jersey and Red Dairy Cattle, respectively.
Table 6 gives trait definitions as provided by
Estimated genetic parameters are shown in APPENDIX I, APPENDIX II, APPENDIX III, APPENDIX IV and APPENDIX V for Brown Swiss, Guernsey, Holstein, Jersey and Red Dairy Cattle, respectively. Parameters are listed by trait and country.
National proofs were first de-regressed within country and then analysed jointly with a linear model including the effects of evaluation country, genetic group of bull and bull merit. Heritability estimates used in both the de-regression and international evaluation were as in each country's national evaluation (Table 6).
Ancestor-bulls without own proofs were traced back two generations from the oldest bulls with proofs in order to increase across country connections and account for the effect of selection.
Genetic groups were defined according to unidentified parents by national origin, breed and birth year of the bull and path of selection (sire, maternal grand-sire, maternal grand-dam). Birth year grouping was by 1-5 year periods. Smaller groups (consisting of less than 15 bulls) were combined.
Analysis followed a similar procedure as Mace for production traits.
Publication of Interbull evaluations
Results were distributed by the Interbull Centre to designated
representatives in each country. The international evaluation file comprised international proofs expressed on the base and unit of each country included
in the analysis. Such records readily provide more information on bull performance in various countries, thereby minimising the need to resort to
At the same time, all recipients of Interbull results are expected to honour the agreed code of practice, decided by the Interbull Steering Committee, and only publish international evaluations on their own country scale. Evaluations expressed on another country scale are confidential and may only be used internally for research and review purposes.
All recipients are also expected to follow the agreed guidelines for advertising genetic merit. The guidelines has been distributed to all members and is available on the Interbull homepage (http://www.interbull.org) under "Publications and Documentation/General information".
Next routine international evaluation
The next routine international evaluation for dairy
production, udder health, conformation, longevity, calving (Brown Swiss,
Holsteins, Red Dairy Cattle) and fertility traits is scheduled for March 2008.
New data for the March routine run should reach the Interbull Centre not later
than Tuesday Mar 18, 2008, 17:00 Central European Time (CET); in any case, the
most recently received data will be considered. The target time for distribution
of results for internal review to designated representatives, who have signed a
confidentiality agreement with the Centre, is Thursday March 27, 2008.
Official release date of the results is targeted to be Tuesday April 1, 2008.
Next test international evaluation
The next test international evaluation for dairy
production, conformation, udder health, longevity, calving traits (Brown Swiss,
Holstein, Red Dairy Cattle) and female fertility traits is scheduled for May
2008. Countries wishing to enter the system for the first time or planning to
submit new information (modified national evaluation procedure, new breeds etc)
for following routine evaluations must have their data tested in this test-run.
Deadline for sending data and validation results to the Interbull Centre for the May 2008 test evaluation is April 22, 2008 at 17:00 CET.
Means of result distribution from the Interbull Centre
Electronic exchange of data is probably more efficient
than anything else. Currently most countries in the service have established
internet connections and receive international evaluation results on the day of
their release. Subscribers to the service that do not already exercise this
option are encouraged to consider it and establish an internet connection and
ftp account. When such accounts are available, please provide their
specifications to the Interbull Centre. Until then, data will be delivered on
For more information about the international genetic evaluation service please contact the Interbull Centre:
address: SLU Box 7023, 750 07 Uppsala, Sweden; fax: +46-18-672648;
Please use Interbull_at_hgen.slu.se for all communication regarding Interbull services.