**Appendix A**

The GenStat v. 18 codes:

JOB IMPORT 'Data.xls';is=names PRINT names

FOR Trait=LAI1,LAI2,SPADo1,SPADo2,SPADv1,SPADv2,yd,sh\_v,no\_p,no\_gr,TGWo, TGWv,no\_pod,no\_sd WSTATISTIC [p=test] Trait

ENDFOR

FOR Trait=LAI1,LAI2,SPADo1,SPADo2,SPADv1,SPADv2,yd,sh\_v,no\_p,no\_gr,TGWo, TGWv,no\_pod,no\_sd

TREAT Year\*System\*Cultivar
