Abstract

A review of recent works is presented. As a measure of performance, transformations of earning are generally used now. New measures use directly ranks in each competition which makes it possible to take into account each result, non earnings horses and avoids to use subjective measure of the event. Interest of accounting for non earning and non starters is discussed. Complexity of the competitive life could be taken into account through traits as precocity (high correlation with mature performance but different results about heritability) and longevity (better heritability with a survival model than with count of starts). Description of aptitude is detailed in thoroughbred by different traits for different distances and in sport horses by null correlation between dressage and jumping, and various results about « amateur » and professional competition. Genetic models are improved by adding of inbreeding and long term response.

A. Ricard

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 24: Sheep and goats (fibre); sheep and goats (meat and milk); poultry; horses; buffaloes., , 388–395, 1998
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