Summary
It is not possible to estimate the predicted response to S1 family selection from the genetical variance between S1 family means, nor do estimates of the additive genetic variance and the dominance variance help, as the numerator of the response formula is ∑2pqααs. Once it is appreciated that this term is twice the genetical covariance between either half-sib and S1 or full-sib and S1 family means, practical methods of estimating the response are obvious.
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Bradshaw, J. Estimating the predicted response to S1 family selection. Heredity 51, 415–418 (1983). https://doi.org/10.1038/hdy.1983.46
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DOI: https://doi.org/10.1038/hdy.1983.46
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