Beef HerdPlus
Journal 2014/15
The €uro-Star system a really quick explanation
‘I’m not interested in a bull’s figures. I’d rather see the bull myself in the flesh and make up my own mind as to how good or bad he is.’ ‘Sure how can they say he’s a 1 star bull, look at him, best looking bull I ever bred. Come around the back of him here and look at how wide he is – some bull’. It’s fair to say that some people see the breeding values that ICBF assigns to pedigree animals as being alien & unrelated to the actual cut & thrust of pedigree breeding. €uro-Stars are often seen as being conjured up by a computer that sits in an office and is operated by somebody that has never pulled on a pair of wellies or knows what a farmer looks like. It’s understandable that this image could flash through someone’s mind, particularly if they are disappointed with the €uro-Star ratings that have been awarded to one of their own animals. Fortunately, however this is not how ICBF actually produces genetic evaluations.
Stripping away all the technical jargon & scientific terminology attached to ‘Genetic Evaluations’, such as ‘correlations’ and ‘matrixes’, which can often be offputting – the easiest way to understand the process that ICBF follows when producing €uro-Stars is to think of the general process that a cattle judge will go through at a show before picking a winner. Take a class of bulls at a show for example: 1. All of the bulls in that class will be of a similar age. 2. The judge will normally inspect each bull individually in order to get an impression as to how well developed he is for particular traits of interest. Judges can often be seen running their hands over a bull’s hindquarter & loin as well as watching intently as the animal is walking – the whole time adding to their overall impression of the animal. 3. Finally the judge will line up the bulls, ranking them from 1st to last, based on the impression of the animals that was formed when they were being judged. So although no data is being recorded in writing or inputted into a computer in the above judging process, data about the animal is being stored in the judge’s mind and is subsequently used to decide on how the animals are ranked.
Archie McGregor (judge) in deep study, assessing the bull lineup at the All Ireland Bull & Heifer Derby 2007.
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