Abstract
Quantitative genetic theory, based on the concept of heritability (Lush 1940), provides a statistical description of population variability, and thus allows prediction of the expected response of the population to selection. This prediction is strictly valid only for a single generation, because the components of the phenotypic variance will themselves be expected to change with selection. These changes are not drastic, so that the theory does give a reasonable description of the short-term effects of selection, although just how long this "shortterm" is will depend on the particular character under selection and the particular population (Barker 1967).
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 7. Symposia (1), , 24–28, 1982
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