Varying of average yields of the commercial hybrid ZPSC 341 over different levels of percentage participation of fertile plants

Abstract

The aim of the study was to determine the optimal ratio of male sterile (cms-S) to male fertile components of the hybrid ZPSC 341, in order to obtain the maximum yield in the commercial production. The present study encompassed observance of effects of different proportions of fertile to sterile plants on grain yield of the hybrid ZPSC 341. The three-replicate trial was set up according to the randomised block design. Twenty one mixtures with 0, 5, 10, …up to 100% of fertile plants mixed with the sterile variant of the hybrid ZPSC 341 were made. The original fertile hybrid ZPSC 341 was three times included into the trial as a check (handpollinated ZPSC 341, ZPSC 341 F1 and reciprocally crossed ZPSC 341), so as to control reliability of the trial. Yield, variations in yields and effects of fertile and sterile cytoplasm of the hybrid on yields were observed. The effect of the percentage of fertility, i.e. of sterile to fertile variant ratio on yield was determined. Gained results show that the highest average yield (16.071 t ha-1 ) was achieved with 90% of fertility, in contrast to the hybrid with 30% of fertility in which the lowest yield (14.112 t ha-1 ) was recorded.