Abstract

Daughters of 200 widely used Holstein sires were split into 2 independent data sets, grades versus registered, and into 2 independent data sets based on herd number. Restricted maximum likelihood estimates of heritability for culling in first lactation, survival to 48, 54 and 84 months and age at last record (after adjustment for first lactation milk yield, linear and quadratic) within each of the 4 data sets were low (mean of .04). Adjusted correlations between sire solutions from independent data sets ranged (absolute magnitude) from .42 to 2.09. Adjusted correlations between sire solutions for survival traits from grade daughters and proofs for 14 linear type traits and PD type computed by the Holstein Association of America were as large as .60 in absolute magnitude. Selection for higher udders and closer teat placement may help reduce involuntary culling.

G. W Rogers, M. R Dentine, I. Miedema, H. D Norman

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XIV. Dairy cattle genetics and breeding, adaptation and conservation., , 213–216, 1990
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