"LINEARITY OF HERITABILITY OF HOLSTEIN FIRST-LACTATION MILK PRODUCTION" by L. Dale Van Vleck and C. L. Hart

Animal Science, Department of

 

Document Type

Article

Date of this Version

May 1965

Comments

Published in Journal of Dairy Science. Copyright © 1965 American Dairy Science Association. Used by permission.

Abstract

The regression of daughter on dam first-lactation milk deviations from herd-mate averages was found to be linear from an analysis of 47,400 Holstein pairs. The linear equation was y=-25.6 + .210 (x -27.6) and the quadratic equation was y=-25.6 + .208 (x -27.6) + .0000222 (x2-44131.4) with correlation coefficients, .18258 and .18268, respectively. These results suggest that selection response can be predicted adequately even with very large selection differentials.

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