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Báo cáo sinh học: "Selection response of growth rate in rabbits for meat production"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Selection response of growth rate in rabbits for meat production | Genet Sei Evol 1992 24 527-537 Elsevier INRA 527 Original article Selection response of growth rate in rabbits for meat production J Estany J Camacho M Baselga A Blasco Universidad Politécnica de Valencia Departamento de Ciencia Animal 46020 Valencia Spain Received 9 August 1991 accepted 21 September 1992 Summary - Genetic and environmental trends in 2 lines of rabbit B and R selected on individual weight gain IPG from weaning 4 wk to slaughter 11 wk were estimated using mixed model methodology. Line B was derived from the California breed and line R was a synthetic of stock of different origin. The data were collected from a single herd and comprised 7 718 individuals in line B and 9 391 in line R the lines having 12 and 9 generations of selection respectively. Realized responses in the 2 lines were 2.7 and 2.2 of the initial mean per year respectively and showed that selection on WG was effective but was less than expected. Selection on slaughter weight SW and effects of selection on other economic traits are discussed. It is concluded that selection on either WG or sw is a simple method for improving growth rate in rabbit sire line stocks. selection growth rate rabbit mixed model Resume - Réponse à la selection pour la croissance chez le lapin de chair. On a estimé les tendances génétiques et environnemeniales dans 2 lignées de lapin B et R sélectionnées sur le gain de poids WG entre le sewage 28 jours et I abattage 77 j en utiỉisant la méthodologie du modèle mixte. La lignée B est issue de la race califomienne la lignée R est une souche synthétique. Les données recueillies dans un seul élevage incluaient 7 718 individus de la lignée B et 9 391 de la lignée R représentant respectivement 12 et 9 generations de selection. Les réponses à la selection dans les 2 lignées respectivement 2 7 et 2 2 de la moyenne par an montrent que la selection a été efficace mats avec des réponses inferieures aux valeurs espérées. La selection sur le poids d abattage SW et les effets