Abstract
Now that Mr. Edwards1 has made the first point of his original letter clear, his criticism is one which has already been suggested, and discussed, by myself. If this criticism were invariably valid, it should also hold good as regards butter-fat yield. In the case of Mr. Madsen's work the argument may be valid, but as I believe his butter-fat figures were calculated on the averages of percentages, this may explain a similarity in the milk and butter-fat figures. A truer indication may be obtained from the work of Robison and myself, to which Mr. Edwards has already made reference, where, despite what Mr. Edwards calls the phenotypic selection of the sires, the butter-fat correlation of granddaughters to their paternal grandsire is the same as to the maternal grandsire.
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References
NATURE, 129, 867, June 11, 1932.
NATURE, 129, 868, June 11, 1932.
Fisher, R. A., ”Statistical Methods for Research Workers”, 3rd edition, p. 45.
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SMITH, A. Inheritance of Milking Capacity. Nature 130, 98 (1932). https://doi.org/10.1038/130098a0
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DOI: https://doi.org/10.1038/130098a0
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