Short Communication: Genetic Evaluation of the Interval from First to Last Insemination with Survival Analysis and Linear Models

From: Journal of Dairy Science | Date: December 1, 2006| Author: | Copyright information

ABSTRACT

Sire breeding values for the interval between the first and last insemination were predicted using 4 proportional hazards models (survival analyses) and 2 linear mixed models to determine which would result in a more accurate genetic evaluation. A stochastic simulation describing the reproductive cycle of first-parity cows was conducted, in which true breeding values for conception rate were created. The model included the effects of sire and herd. The highest correlations between true breeding values for conception rate and breeding values for the interval between first and last ...

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