The plus-hybrid effect on the grain yield of two ZP maize hybrids

Abstract

The combined effect of cytoplasmic male sterility and xenia on maize hybrid traits is referred to as the plus-hybrid effect. Two studied ZP hybrids differently responded to this effect for grain yield. All plus-hybrid combinations of the firstly observed hybrid had a higher yield than their fertile counterparts, but not significantly, while only one combination of the second hybrid positively responded, also without statistical significance. It seems that the observed effect mostly depended on the genotype of the female component.

Plus-hibrid efekat odnosi se na kombinovani uticaj citoplazmaticne muške sterilnosti i ksenija na svojstva hibrida kukuruza. Dva ispitivana ZP hibrida različito su reagovala ovaj efekat za prinos zrna. Sve Plus-hibrid kombinacije prvog ispitivanog hibrida su imale veći prinos od svojih fertilnih analoga, ali ne značajno, dok je samo jedna kombinacija drugog hibrida pozitivno odreagovala, takođe bez statističke značajnosti. Ispitivani efekat izgleda zavisi najviše od genotipa majke.