Selection theory with overlapping generationsThéorie de la sélection avec générations chevauchantesSelektionstheorie für sich überschneidende Generationen |
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| Authors: | JW James |
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| Institution: | 1. School of Wool and Pastoral Sciences, University of New South Wales, Kensington 2033 Australia;2. Institute of Animal Genetics and Breeding, Agricultural University of Norway, 1432 rAs NLH, Norway |
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| Abstract: | Recent developments in the theory of artificial selection when generations overlap are discussed. The implications of genetic differences between progeny from parents of different ages, and between animals of different ages, for predicting genetic gains and optimizing selection procedures, are pointed out. The importance of proper definition of generation length and genetic selection differential is emphasized. Matrix methods of predicting selection responses are numerically illustrated, and the influence of the initial genetic situation on subsequent gains is shown in an example. Proper specification of an appropriate control population is essential for evaluation of genetic progress. |
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