Applied genetic evaluations for production and functional traits in dairy cattle.
The objective of this study was to review the current status of genetic evaluation systems for production and functional traits as practiced in different Interbull member countries and to discuss that status in relation to research results and potential improvements. Thirty-one countries provided information. Substantial variation was evident for number of traits considered per country, trait definition, genetic evaluation procedure within trait, effects included, and how these were treated in genetic evaluation models. All countries lacked genetic evaluations for one or more economically important traits. Improvement in the genetic evaluation models, especially for many functional traits, could be achieved by closing the gaps between research and practice. More detailed and up to date information about national genetic evaluation systems for traits in different countries is available at www.interbull.org. Female fertility and workability traits were considered in many countries and could be next in line for international genetic evaluations.
Mark
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T
Interbull Centre, Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, 75007 Uppsala. Thomas.Mark@hgen.slu.se
D000818:Animals; D001947:Breeding; D002417:Cattle / Q000235:genetics*; D003612:Dairying / Q000379:methods; D004777:Environment; D005260:Female; D014644:Genetic Variation; D007391:International Cooperation; D007774:Lactation / Q000235:genetics; D008297:Male; D008460:Meat; D008957:Models, Genetic; D011247:Pregnancy; D019655:Quantitative Trait, Heritable