Summary
It is shown that a joint scaling test developed by Tan (1974) is closely related to the widely used standard Cavalli joint scaling test (described by Mather and Jinks, 1971) which was not referred to in Tan's paper. With the numbers of individuals per generation observed in practice, the two tests give essentially similar results. The Cavalli procedure also provides estimates of genetical parameters and is more readily extended to a wider range of situations.
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References
Cavalli, L L. 1952. An analysis of linkage in quantitative inheritance. In Quantitative Inheritance, ed. E. C. R. Reeve, and C. H. Waddington. H.M.S.O., London.
Jinks, J L, and Perkins, J M. 1969. The detection of linked epistatic genes for a metrical trait. Heredity, 24, 465–475.
Mather, K. 1949. The genetical theory of continuous Variation. Proc 8th Int, Cong Genetics Hereditas, Suppl Vol, 376–401.
Mather, K, and Jinks, J L. 1971. Biometrical Genetics. Chapman and Hall, London.
Tan, W Y. 1974. The approximate overall test for epistatic effects in biometrical genetics. Biometrics, 30, 697–703.
Wedderburn, R W M. 1974. Generalised linear modeis specified in terms of constraints. JRSS, B, 36, 449–454.
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Gale, J., Mather, K. & Jinks, J. Joint scaling tests. Heredity 38, 47–51 (1977). https://doi.org/10.1038/hdy.1977.6
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DOI: https://doi.org/10.1038/hdy.1977.6
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