Summary
There is an inherent bias in intraclass correlations since the expectation of a ratio does not equal the ratio of expectations. A simple accurate approximation for this bias is derived, and it is found that the inherent bias is usually negligible. Selection of sires is known to bias half-sib heritability estimates, and appropriate formulae are given and discussed.
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Literature
Buckland, R.B.: Genetic influences on the activity of some enzymes in fresh and stored chicken semen and their relationships to fertility. In: R. Bogart (Ed.), Genetics Lectures, Vol.4, 39–67. Corvallis: Oregon State U.P. 1975
Cochran, W.G.: Improvement by means of selection. Proc. 2nd. Berkeley. Symp. Math. Statist. Probab. 1950, 449–470 (1951)
Ginsburg, E.H.: On the planning of the experiment on estimation of intraclass correlation. Biom. Z. 15, 47–52 (1973)
Morley, F.H.W.: Selection for economic characters in Australian Merino sheep. V. Further estimates of phenotypic and genetic parameters. Aust. J. agric. Res. 6, 77–90 (1955)
Pederson, D.G.: The estimation of heritability and degree of dominance from a diallel cross. Heredity 27, 247–264 (1971)
Reeve, E.C.R.: Studies in quantitative inheritance. III. Heritability and genetic correlation in progeny tests using different mating systems. J. Genet. 51, 520–542 (1953)
Rønningen, K.: The effect of selection of progeny performance on the heritability estimated by half-sib correlation. Acta Agric. Scand. 22, 90–92 (1972)
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Communicated by J.S.F. Barker
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Ponzoni, R.W., James, J.W. Possible biases in heritability estimates from intraclass correlation. Theoret. Appl. Genetics 53, 25–27 (1978). https://doi.org/10.1007/BF00273132
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DOI: https://doi.org/10.1007/BF00273132