the effect of alternative mating designs and selection strategies on adult multiple ovulation and embryo transfer (moet) nucleus breeding schemes in dairy cattle另类交配设计和选择策略的影响在成人多个排卵和胚胎移植(酩悦)核在奶牛育种方案.pdf

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, Roslin, Midlothian, EH25 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 The use of more group. 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 / embryo transfer / dairy cattle / genetic gain Résumé mdash; Effets du système de croisement et de la stratégie de sélection chez les bovins laitiers sur les schémas utilisant l’ovulation multiple et le transfert d’embryons.