The Number of Daughter-Dam Pairs Needed for Estimating Heritability

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Abstract
A formula for estimating the number of daughter-dam pairs needed when estimating heritability by daughter on dam regression in the one-way classification analysis for fixed values of the average number of pairs per class, of the ratio of daughter to dam variance, of the anticipated heritability estimate, and of the desired variance of the estimate has been presented. The effect on N of changes in these four variables has been illustrated. This procedure was extended to multiple classification analysis and was also used to determine the number of pairs needed to estimate repeatability by regression of second records on first records. Copyright © . .

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