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  ASReml  ~  Am I overfitting with the spacial model

hosseinvk
Posted: Thu Jun 13, 2019 3:12 am Reply with quote
Joined: 22 Aug 2017 Posts: 3
Hi folk,
I have run a spacial model on a field trial with the following parameters in two models (M1 and M2)

M1:
fixed = lin(Column ) + lin(Row)
random = Column + Row

M2
fixed = lin(Row)
random = Column + Row

The difference between the two is the parameter lin(Column ) which is absent from M2.

I get similar logL's and variograms for the two models, however the difference lies in their heritability.

M1 hirritability = 0.20
M2 hirritability = 0.28

Am I over-fitting if I choose M1 over M2, for it has a higher heritability?
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