SUMMARY

Increase of harvest index cen be one of the models for increasing of yield. H. I. of old varieties is about 30-35% and new have 40-45%. Acording to its increasing is possible up to 60%. In vecant years this model has been left and the increase of yield is considered trough incresing of total bio-mass or breeding of varieties.

Tested genotypes have showed various haight as well as various stability of tested performances. As ecpected, the highes grain yield and haight of harvest index expressed the varieties which were bred in Balkanien perisula, falhowed with varieties from Russia and Ukraina. On the basis of resullts, some genotypes, which can be potential parents for crossing are selected.

The important corelation among characteristies wasnt confirmed form any characteristic.

          Key words: harvest index, yield, stability.