Summary
Prediction of response to selection for traits with direct and maternal components is described for discrete and overlapping generations. Expected phenotypic response is the sum of direct and maternal contributions, the latter having a genetic and an environmental component. With overlapping generations the selection differentials achieved on these components are added to respective updated vectors containing age-sex distributions with values of previous selection rounds. An example demonstrates that in the early stages, results may be considerably affected by environmental correlations between direct and maternal effects. The method could be helpful in interpreting phenotypic changes in a population selected for traits with maternal effects.
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References
Barlow R (1978) Biological ramifications of selection for preweaning growth in cattle. A review. Anim Breed (Abstr) 46:469–494
Dickerson GE (1947) Composition of hog carcasses as influenced by heritable differences in rate and economy of gain. Res Bull Iowa Agric Exp Stn 354:489–524
Hanrahan JP (1976) Maternal effects and selection response with an application to sheep data. Anim Prod 22:359–369
Hill WG (1974) Prediction and evaluation of response to selection with overlapping generations. Anim Prod 18:117–139
Hohenboken WD, Brinks JS (1971) Relationships between direct and maternal effects on growth in Herefords. 2. Partitioning of covariance between relatives. J Anim Sci 32:26–34
Koch RM (1972) The role of maternal effects in animal breeding. 4. Maternal effects in beef cattle. J Anim Sci 35:1316–1323
Koch RM, Gregory KE, Cundiff LV (1982) Critical analysis of selection methods and experiments in beef cattle and consequences upon selection programs applied. Proc 2nd World Congr Genet applied to livestock production, vol 5. Ed Garsi, Madrid, pp 514–526
Van Vleck LD, St Louis D, Miller JI (1977) Expected phenotypic response in weaning weight of beef calves from selection for direct and maternal genetic effects. J Anim Sci 44:360–367
Wilham RL (1963) The covariance between relatives for characters composed of components contributed by related individuals. Biometrics 19:18–27
Willham RL (1980) Problems in estimating maternal effects. Livest Prod Sci 7:405–418
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Communicated by J. S. F. Barker
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Mueller, J.P., James, J.W. Phenotypic response to selection for traits with direct and maternal components when generations overlap. Theoret. Appl. Genetics 70, 123–127 (1985). https://doi.org/10.1007/BF00275310
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DOI: https://doi.org/10.1007/BF00275310