Average yield of hybrid ZPSC 341 due to different percentage of fertile and sterile plants participation in location of Vojvodina.

The aim of the study was to determine the changes in grain yields in yield trials related to the sterile and fertile ratio of female parent in seed production. Total of 21 mixtures of 0, 5, 10, etc. up to 100% of fertile plants mixed with the sterile variant of the hybrid ZPSC 341 was made. Because of reliability of the experiment, the original fertile hybrid ZPSC 341 was used as a check three times. Effects of fertile, i.e. sterile male cytoplasm in female parent of the observed hybrid on yield and yield variations were studied. The extent of dependence of the percentage of fertile plants on yield was determined. Furthermore, the sterile to fertile hybrid variant ratio resulting in the highest yield was established. The analysis of results indicate that the highest average yield (16.024 t ha-1) was obtained with 80% fertility of female plants, while the lowest average yield (13.892 t ha-1) was gained with 15% fertility, although the difference was not significant