TAILIEUCHUNG - Báo cáo sinh học: " Balancing selection response and inbreeding by including predicted stabilised genetic contributions"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Balancing selection response and inbreeding by including predicted stabilised genetic contributions | Genet Sei Evol 1995 27 541-549 Elsevier INRA 541 Original article Balancing selection response and inbreeding by including predicted stabilised genetic contributions in selection decisions JR Brisbane JP Gibson University of Guelph Centre for Genetic Improvement of Livestock Department of Animal and Poultry Science Guelph ON NIG 2W1 Canada Received 30 September 1994 accepted 30 August 1995 Summary - A selection strategy is investigated which should improve upon methodology previously introduced for reducing inbreeding by including genetic relationships in selection decisions. The new strategy includes predictions of stabilised genetic contributions of parents to descendants in selection decisions. An additive infinitesimal genetic model is assumed with discrete generations of selection and random mating of selected parents. Stochastic simulation is used to compare rates of inbreeding and genetic gain from the strategy using relationships with those from the strategy using predicted genetic contributions. The latter strategy gives slightly higher genetic gain at a given level of cumulate inbreeding but the advantage is small and the calculations are more complex and difficult to apply in practice and therefore the previous strategy using relationships is more useful for practical application. inbreeding selection genetic gain Resume Un compromis entre la réponse à la selection et la consanguinité obtenu en considérant les contributions génétiques à 1 équilibre des parents sélectionnés. Une strategic de selection qui devrait améliorer la méthodologie précédemment suggérée pour réduire la consanguinité par I utilisation des relations génétiques dans les decisions de selection est étudiée. Cette nouvelle strategic utilise la prediction de la contribution génétique à 1 équilibre des parents à leurs descendants dans les decisions de selection. On a suppose un modèle polygénique additif avec des generations discretes de selection de même que la panmixie entre les parents

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