multivariate analysis - use of !GP and lost SE

From: yeon <asremlforum_at_VSNI.CO.UK>
Date: Tue, 24 Mar 2009 16:08:22 +0000

Recently, I've been doing multivariate analyses to estimate genetic correlations among various traits.
In some models, I used !GP to enforce positive definite covariance matrices because the genetic or phenotypic correlation tends to be over 1. However, in this case, ASReml does not give me SEs of variances, covariances and correlations (or possibly the SEs are very small).
Does anyone know why this problem occurs and how I could solve it?

Thanks in advance,

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Received on Wed Mar 24 2009 - 16:08:22 EST

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