Interbull Routine Genetic Evaluation for Direct Longevity Traits
International genetic evaluations for direct longevity of bulls from Australia, Belgium, Canada, Switzerland, Germany, Denmark, Spain, Finland, France, The United Kingdom, Ireland, Israel, Italy, New Zealand, The Netherlands, and The United States of America were computed in this evaluation for Ayrshire, Brown Swiss, Guernsey, Jersey, Holstein and the Simmental breed.
Changes in national data compared to:
- May 2006 routine evaluations
Changes in international evaluations
- May 2006 routine evaluations
Data and method of analysis of sire variances were implemented
Data were national genetic evaluations of AI sampled bulls with daughters in
at least 10 herds. Table 1 presents the amount of data included in this Interbull evaluation.
Table 2 presents the date of evaluation as supplied by each country in the 017-proof file.
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. Different breeds were analysed separately. Heritability estimates used in both the de-regression and international evaluation were as in each country's national evaluation (Table 3).
Estimated genetic parameters are shown in APPENDIX I and the corresponding number of common bulls are listed in APPENDIX II. Parameters are listed by breed, trait and country.
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). Minimum group size was set to 30.
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 and calving traits (Holsteins, Ayrshire, Brown Swiss) is scheduled for November 2006. New data for the November routine run should reach the Interbull Centre not later than Tuesday October 31, 2006, 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, November 9, 2006. Official release date of the results is targeted to be Monday, November 13, 2006.
Next test international evaluation
The next test international evaluation for dairy production, conformation, udder health, longevity and calving traits (Red dairy cattle breeds [previously Ayrshire], Brown Swiss, Holstein) and female fertility traits (Holstein) is scheduled for September 2006. 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 September 2006 test evaluation is September 1, 2006 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 has 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.