Dear All,

I have a virulence phenotype table (22 varieties x 36 isolates) with scores from 1 to 10, and would like to determine the cluster groupings of isolates based on their ranking of 15 varieties?

The data are unbalanced.

Can you please help me and tell how should I arrange varieties, isolates, and virulence scores in the datafile to run linear mixed model test (REML) with Genstat 18th?

Can you tell me ...?

- Which will be 'Y-Variate'?

- Which will be 'Fixed Model'?

- Which will be 'Random Model'?

- Which will be 'Spline Model'?

I have not managed to cope with this.

Thanks a lot for your help.

József