Abstract
The introduction of sterile forms of parental inbreds in the production of hybrids maize seed has led to the improvement of production methods and to the facilitation of seed crop control. The aim of the present study was to compare utility values of the F1 generation between seeds produced by the use of standard inbreds and seeds produced from plants with cytoplasmic male sterility inherited maternally. Significant differences were detected in all observed traits compared to the version of the hybrid combination. The share of large seed fractions was higher in the fertile than in the sterile version, while the SR to SF ratio was uniform in the sterile version. The weight of 1000-seed was greater in the sterile form (325.7 g), while the first count and germination were equal amounting to 97.2 %. The first count (95.7 %) and germination (94.5 %) were also high in the fertile version.
Highlights
The seed production of hybrid combinations for furhter multiplications means providing all conditions necessary for good quality seed production with the application of all cropping practices
The introduction of sterile forms of parental inbreds in the production of hybrids maize seed has led to the improvement of production methods and to the facilitation of seed crop control
The aim of the present study was to compare utility values of the F1 generation between seeds produced by the use of standard inbreds and seeds produced from plants with cytoplasmic male sterility inherited maternally
Summary
The seed production of hybrid combinations for furhter multiplications means providing all conditions necessary for good quality seed production with the application of all cropping practices. Parental inbreds have a very significant importance in producing high quality hybrid maize commercial seed. Production procedures are prescribed in accordance with regulations and breeders' instructions. The occurrence of male sterility in maize was utilised to develop sterile versions of parental components in seed production. Detasseling is a measure that is applied in maize hybrid production to prevent self-pollination in crosses. Using sterile female compontnes saves time and money and prevents uncontrolled selfpollination that occurs as a result of inadequate detasseling
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