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United States Department of Agriculture

Agricultural Research Service

Title: International Genetic Evaluations: don't Let the Numbers Confuse You!

Authors
item Powell, Rex
item Hubbard, Suzanne
item Sieber, Martin - NAAB

Submitted to: Nuestro Holando
Publication Type: Other
Publication Acceptance Date: September 1, 1998
Publication Date: N/A

Technical Abstract: As more and more genetic material is traded around the world, the need for accurate comparisons of the genetic merit of bulls from different countries has become increasingly important. The mission of the International Bull Evaluation Service (Interbull) is to promote the development and standardization of international genetic evaluations for cattle. Interbull evaluations for milk, fat, and protein yields currently are released twice year and will soon become available four times a year (February, May, August, and November). Joint Canadian and U.S. research projects on international type evaluations currently are underway. In August 1997, Holstein Association USA began to release comparable type evaluations for bulls from 6 countries. Both yield and type evaluations are calculated with a multiple across-country procedure that allows bulls from many countries t be evaluated simultaneously. Genetic evaluations published in trade journals and advertisements should be expressed only in the original units of the official evaluations released by each country. Only Interbull evaluations or evaluations converted with the most current official conversion equations should be published for bulls from other countries. The converted evaluation should be used only if an Interbull evaluation does not exist. If a converted evaluation is published, it should be labeled with a "c" suffix and include a converted reliability. All evaluations should be the most current information available at the time of publication. Most importantly, all evaluations should be labeled as to source, date, expression of genetic merit, units, and trait. If an evaluation is not labeled, make sure you find out what the numbers mean before you make breeding decisions.

Last Modified: 10/30/2014
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