A method for the dynamic management of genetic variability in dairy cattle

Genetics, Selection, Evolution : GSE
Jean-Jacques ColleauJérôme Bechu

Abstract

According to the general approach developed in this paper, dynamic management of genetic variability in selected populations of dairy cattle is carried out for three simultaneous purposes: procreation of young bulls to be further progeny-tested, use of service bulls already selected and approval of recently progeny-tested bulls for use. At each step, the objective is to minimize the average pairwise relationship coefficient in the future population born from programmed matings and the existing population. As a common constraint, the average estimated breeding value of the new population, for a selection goal including many important traits, is set to a desired value. For the procreation of young bulls, breeding costs are additionally constrained. Optimization is fully analytical and directly considers matings. Corresponding algorithms are presented in detail. The efficiency of these procedures was tested on the current Norman population. Comparisons between optimized and real matings, clearly showed that optimization would have saved substantial genetic variability without reducing short-term genetic gains.

Citations

Mar 17, 2009·Genetics, Selection, Evolution : GSE·Jean-Jacques ColleauDidier Regaldo
Feb 11, 2011·BMC Genetics·Jean-Jacques ColleauIsabelle Palhière
Jun 28, 2011·Journal of Animal Science·D Hinrichs, T H E Meuwissen
May 16, 2012·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·C Danchin-BurgeE Verrier
Oct 4, 2012·Animal : an International Journal of Animal Bioscience·M G MelkaF Schenkel
Sep 23, 2008·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·J J Colleau, T Tribout
Sep 24, 2013·Journal of Dairy Science·C CarillierC Robert-Granié
May 18, 2013·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·H F OlsenG Klemetsdal
Jul 30, 2015·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·H ChapuisJ J Colleau
Oct 2, 2013·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·M G MelkaF S Schenkel
Jul 24, 2021·Animal : an International Journal of Animal Bioscience·L F BritoF Miglior

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