TAILIEUCHUNG - Báo cáo sinh học: " The effect of alternative mating designs and selection strategies on adult multiple ovulation and embryo "

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: The effect of alternative mating designs and selection strategies on adult multiple ovulation and embryo | Genet Sei Evol 1991 23 47-65 Elsevier INRA 47 Original article The effect of alternative mating designs and selection strategies on adult multiple ovulation and embryo transfer MOET nucleus breeding schemes in dairy cattle J Ruane AFRC Institute of Animal Physiology and Genetics Research Ros tin Midlothian EII25 9PS Institute of Animal Genetics University of Edinburgh Kings Buildings West Mains Road Edinburgh EH9 3JN Scotland UK Received 17 April 1990 accepted 3 December 1990 Summary - The impact of alternative mating designs and selection strategies on rates of response and inbreeding in closed adult multiple ovulation and embryo transfer MOET nucleus breeding schemes in dairy cattle was investigated by Monte Carlo simulation. Results were compared with those from schemes using hierarchical mating designs and with one male chosen at random from each selected male full sib group. The use of more than one male from each selected sibship reduced inbreeding rates by 24-34 because more sires were used. With one male chosen from each selected sibship factorial mating designs increased response rates by up to 13 because the number of sibships and hence the number of male candidates was increased. Finally factorial sibship schemes which employed both of these strategies increased response rates by 5-14 and with one exception reduced inbreeding rates by 14-30 . breeding programmes I embryo transfer dairy cattle I genetic gain Resume Effets du système de croisement et de la strategic de selection chez les bovins laitiers sur les schemas utilisant 1 ovulation multiple et le transfer d embryons. L impact de differents systèmes de croisement et de strategies de selection sur les taux de réponse et sur I augmentation de la consanguinité a été étudié par simulation dans le cas d un noyau de selection de bovins laitiers conduit en population fermee et exploitant I ovulation multiple et le transfert d embryons chez les adultes. Les résultats ont été compares à ceux obtenus dans .

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