Assume we have an unreplicated trial with repeated checks. Now,
for the analysis of such a trial i believe that the estimate of 'error'
comes (or should) come from an ANOVA on the check plots. However, I have a
suspicion that the error estimate is from an ANOVA on the checks and
The problem with the latter approach is that typically in unreplicated
trials check plots will usually have a smaller variance than the random
genotypes. Hence if we run an ANOVA on checks and geno's in order to
estimate the error component for our trial it may be poorly (over or
underestimated) estimated .
Is there a way in ASREML to just get the estimate of the error variance
solely from an ANOVA on the checks when we fit a spatial model to our
data Yield ~ mu c(checks) !r genotypes ?
Many thanks for your help.
Department Of Agriculture
University Of Queensland