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Báo cáo sinh học: " A new method aimed at using the dominance variance in closed breeding populations"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: A new method aimed at using the dominance variance in closed breeding populations | 63 Genet Sei Evol 1993 25 63-74 Elsevier INRA Original article A new method aimed at using the dominance variance in closed breeding populations M Toro CIT-INIA Departamento de Production Animal Apartado 8111 28080 Madrid Spain Received 26 August 1991 accepted 25 November 1992 Summary - A new method that allows use of part of the dominance effects in a closed population is proposed. In the framework of a progeny test selection scheme the method basically consists of performing 2 types of matings a minimum coancestry matings in order to obtain the progenies that will constitute the commercial population and that will also be utilized for testing purposes and b maximum coancestry matings from which the population will be propagated. The performance of the new method has been checked by computer simulation and results show a superiority over the standard progeny test in all cases where unfavourable alleles are recessive especially when they are at low frequency. artificial selection dominance variance mating strategy computer simulation Resume Une nouvelle méthode visant à utiliser la variance de dominance dans des populations fermees en selection. Une nouvelle méthode est proposée pour utiliser les effets de dominance dans des populations fermees. Dans le cadre d un schema de selection sur descendance la methode consists à réaliser 2 types d accouplements a accouplements avec parents minimale afin d obtenir les descendants qui constituent la population commercials et qui en même temps servent à 1 épreuve de descendance et b accouplements avec parenté maximale servant à propager la population. La valeur de la nouvelle methode a été verifiee par simulation sur ordinateur et les résultats montrent qu elle est supérieure à répreuve de descendance classique dans tous les cas OÙ les alleles defavorables sont recessifs et surtout si leurs frequences sont faibles. selection artificielle variance de dominance système d accouplement simulation sur ordinateur 64 M Toro .