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Abstract

The frequency of an undesirable recessive gene in a cattle population was calculated under conditions in which young sires are randomly mated to ♀♀ of the population, only sires not producing affected offspring being returned to use as stud ♂♂. Tables are given of the number of affected offspring...

Author(s)
Van Vleck, L. D.
Citation
Journal of Dairy Science, 1967, 50, pp 201-204
Abstract

Formulae are given for predicting the superiority for milk production of daughters of bulls in regular service at an A. I. centre and the superiority of daughters of bulls on test. A computer programme was developed to examine the optimum bull testing scheme for a centre, taking into consideration...

Author(s)
Van Vleck, L. D.
Citation
Journal of Dairy Science, 1964, 47, pp 441-446
Abstract

The correlations between evaluation procedures, based on deviations from contemporaries of 1st records and averages of records of daughters and a method currently used at the New York Dairy Records Processing Laboratory, are computed for records of daughters of 198 A.I. Holstein sires. These...

Author(s)
Van Vleck, L. D.; O'bleness, G. V.; Henderson, C. R.
Citation
Journal of Dairy Science, 1961, 44, pp 708-714
Abstract

The 1st lactation milk and butterfat (lb. ) records of 24, 995 artificially sired progeny and 32, 831 naturally sired progeny which calved between 1st Sep. 1950 and 30th Nov. 1959 were converted to 2xM. E. and compared on a within herd-year-season contemporary comparison basis. The artificially...

Author(s)
Van Vleck, L. D.; Henderson, C. R.
Citation
Journal of Dairy Science, 1961, 44, pp 1328-1334