Introduction/purpose: This paper presents the results of several different research studies. The inbred lines ZPPL 146 and ZPPL 159 and the maize hybrids ZP 633, ZP 735, and ZP 737 are primarily intended for human and livestock nutrition. Their selection took about four decades. Methods: Spectral bands were registered using the method of resonant Raman spectroscopy of the leaves of inbred maize lines. These spectral bands indicate the conformational characteristics of not only carotenoid molecules but also other compounds (phosphate, gluten, and amide III) in the leaf. Results: A systematic examination of the inbred lines ZPPL 146 and ZPPL 159 and their maize hybrids ZP 633, ZP 735, and ZP 737 was performed in this paper. It was stated that the new inbred lines of corn, i.e. ZPPL 146 and ZPPL 159, are rich in carotenoids and yellow pigments. These lines also have significant quantities of other valuable bioactive compounds and good physical characteristics. The lines have an upright position of the top leaves and belong to the group of maize lines with significant characteristics of the photosynthetic model. They are resistant to high temperatures and are drought tolerant. Conclusion: This paper presents the relevant properties, characteristics and parameters of the new studied inbred maize lines that can be used in selection processes in the future. High-yielding and high-quality maize hybrids, i.e. ZP 633, ZP 735, and ZP 737, have been created from the mentioned inbred maize lines. They are recognizable by their qualities. The hybrid ZP633 is especially noteworthy for human consumption (children and the elderly). Further, from the agronomic-veterinary point of view, it is confirmed that the hybrids ZP 735 and ZP 737 are the most suitable for livestock feeding with the programmed use of corn silage. The relevant agronomic, morphological and nutritional properties of the maize hybrids ZP 633, ZP 735, and ZP 737 are also presented in this paper. The results regarding the grain structure and yield height for grain and silage for the hybrids ZP 677 and ZP 684, produced in Serbia and the countries of Southeastern Europe, are also given.

Mycotoxins naturally contaminate plant - based food. Since organic production does not allow the use of synthetic pesticides in plant protection, many researchers state that organically produced foods are more contaminated with mycotoxins than conven?tional ones. In this regard, the aim of this study was to observe the content of aflatoxins B1, B2, G1 and G2 and deoxynivalenol, as the most common mycotoxins, in organically and conventionally produced seeds of maize, spelt wheat and soya been during the 2015-2017 period. The HPLC/FLD and HPLC/DAD were used to determine the presence of aflatoxins and deoxynivalenol, respectively. The highest number of samples was not positive to the presence of these mycotoxins. Aflatoxin B1 (1.16 ?g/kg) and deoxynivalenol (101.53 ?g/kg) were detected only in the sample of organic maize harvested in 2015. Based on obtained results, no conclusion can be drawn on the effects of organic and conventional production on contents of mycotoxins in seeds of maize, spelt wheat and soya bean, and further long-term studies are required.

The aim of the present study was to evaluate the following parameters for the grain yield of silage maize: variability of inbred lines and their diallel hybrids, superior-parent heterosis and components of genetic variability and heritability on the basis of the diallel set. The two-year four-replicate trial was set up according to the randomized complete-block design at Zemun Polje. It was determined that a genotype, year and their interaction significantly affected variability of this trait. The highest. i.e. the lowest grain yield, on the average for both investigation years. was recorded in the silage maize inbred lines ZPLB402 and ZPLB405. respectively. The analysis of components of genetic variance for grain yield shows that the additive component (D) was lower than the dominant (H1 and H2) genetic variance, while a positive component F and the frequency of dominant (u) and recessive (v) genes for this observed trait point to prevalence of dominant genes over recessive ones. Furthermore. this is confirmed by the ratio of dominant to recessive genes in parental genotypes for grain yield (Kd/Kr> 1) that is greater than unity in both years of investigation. The estimated value of the average degree of dominance (H1/D)1/2 exceeds unity, pointing out to superdominance in inheritance of this trait in both years of investigation. Results of Vr/Vr regression analysis indicate superdominance in inheritance of grain yield. Moreover. a registered presence of non-allelic interaction points out to the need to study effects of epistasis, as it can have a greater significance in certain hybrids. A greater value of dominant than additive variance resulted in high values of broad-sense heritability for grain yield in both investigation years (98.71%, i.e. 97.19% in 1997, i.e. 1998, respectively). and low values of narrow-sense heritability (11.9% in 1997 and 12.2% in 1998)

Rezime: Cilj ovog istraživanja je bio da se na osnovu direktog i recipročnog dialelnog ukrštanja pet inbred linija kukuruza utvrde: varijabilnost, heterozis, kombinacione sposobnosti i genetička osnova nasleĎivanja visine biljke. Ogled je postavljen po metodu slučajnog blok sistema u četiri ponavljanja u toku dve godine. Analiza varijanse kombinacionih sposobnosti za visinu biljke ukazuje na značajnost i opštih i posebnih kombinacionih sposobnosti. Odnos OKS/PKS pokazuje da u nasleĎivanju ove osobine značajniju ulogu imaju neaditivni geni. Razlike izmeĎu direktnog i recipročnog ukrštanja za ovu osobinu bile su visoko značajne kod svih kombinacija, osim kombinacije ZPL-11/6 x NS-1445, a najveći efekat reciprociteta ustanovljen je kod kombinacije ZPL-11/6 x BL-47 u obe godine ispitivanja. Ovo nam ukazuje da u nasleĎivanju visine biljke, osim nuklearnih učestvuju i plazma geni. Visoko značajne pozitivne vrednosti PKS imalo je osam od ukupno deset hibridnih kombinacija. Visoke vrednosti PKS za ovu osobinu imale su hibridne kombinacije F-7R i linije koje su bile loši opšti kombinatori (ZPL-11/6 i BL-47; hibridne kombinacije gde je jedan roditelji sa visokom OKS, a drugi sa niskom OKS), što je verovatno posledica interakcije izmeĎu gena roditelja. Ključne reči: heritabilnost, kombinacione sposobnosti, komponente genetičke varijanse. Uvod Visina biljke je veoma važna osobina, kako za opisivanje novih genotipova kukuruza tako i za produkciju sveže i suve materije, pa čak i za prinos zrna.

This study confirms the hypothesis that there are elite maize inbred lines and hybrids with erect top leaves, which have a dominant property of an efficient photosynthetic and fluorescent model that is successfully used in modern breeding programmes and the production hybrid seed and commercial maize. This statement is supported by the displayed results on the erect top leaves, the dynamics of grain dry-down during the maturation period and photosynthetic and florescence parameters: the temperature dependence of the delayed chlorophyll fluorescence intensity, the Arrhenius criterion for the determination of critical temperatures (phase transition temperatures) and the activation energies. The presented results show that properties of observed maize inbreds and their hybrids are based on the nature of conformational and functional changes that occur in their thylakoid membranes and other chemical tissues structures of grain and intact leaves, as well as, on positive effects in maize breeding. Moreover, other relevant significant breeding and seed production properties (commercial maize quality over grain structure, physical and chemical parameters) of maize inbred lines and their hybrids were analyzed in the present study