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In the two-year field experiment (2013/2014 and 2014/2015), the variability of yield and hectoliter grain mass of 14 winter wheat genotypes was examined. The research was conducted in three locations across the Republic of Serbia: Centre for Small Grains in Kragujevac, Institute for forage crops in Kruševac and Agroinstitute in Sombor. Significant differences in grain yield were found between varieties, locations, years and their interactions, while the influence of the location did not show significant differences in hectoliter mass. Grain yield of studied wheat genotypes in 2013/2014 varied from 3.91 t ha-1 (KG-244/4) to 5.55 t ha-1 (KG-60-3/3), and in 2014/2015 from 5.67 t ha-1 (KG-162/7) to 7.08 t ha-1 (KG-27/6). The hectoliter mass also varied, and most often ranged from 72.1 kg hl-1 (KG-28/6) to 77.2 kg hl-1 (KG-191/5-13) in the first experimental year and from 76.7 kg hl-1 (KG-27/6) to 81.9 kg hl-1 (KG-191/5-13) in the second year. Unfavorable weather conditions which prevailed in the first experimental year, conditioned the formation of smaller and shriveled grains. As a result, the examined KG-wheat genotypes gave lower values in grain yield and hectoliter mass in 2013/2014 compared to 2014/2015. In this study, higher values of heritability in a broad sense were obtained for hectoliter mass (73.66%), and lower values for grain yield (25.82%). This indicates that direct breeding for grain yield is less efficient and it is necessary to have knowledge about the nature of the inheritance of important yield components in order to improve this complex trait.

This research involved analyses of six genotypes of the winter bread wheat (Toplica, Takovčanka, Perfekta, Vizija, KG-56S, and Aleksandra) on the experimental field of Centre for Small Grains in Kragujevac during two growing seasons (2011/2012 and 2012/2013). The most important parameters of bread-making quality were analysed (wet gluten content and rheological flour and dough properties). Grain samples were milled using a Brabender Quadrumat Junior laboratory mill. The gluten content was determined by the standard method and rheological flour and dough properties by Brabender Farinograph. Wet gluten content of analyzed wheat genotypes varied depending on the genotype and the year. The cultivar Aleksandra had the highest value of wet gluten content in both years of investigation (35.48% and 39.03%). The analyses of variance showed highly significant differences of wet gluten content between cultivars, investigated years as well as their interaction. The lowest water absorption in the first year of study was found in Takovčanka cultivar (59.2%), while in the second year in KG-56S (63.8%). The cultivar Vizija showed the highest water absorption in both years of studying (62.13% and 67.3%). According to the analysis of variance, highly significant differences for the water absorption were determined between genotypes, examined years and their interaction. Farinograph properties showed that flour of analyzed cultivars belonged to B1 and C1 quality groups in the first year, and B1 and B2 in the second year. The analysis of phenotypic variance indicated that the highest impact of variance for wet gluten content belonged to year, while for water absorption belonged to cultivar × year interaction.

In this research, 16 genotypes of winter wheat (Triticum aestivum L.) were analyzed where 15 genotypes represent perspective lines created in Center for Small Grains in Kragujevac and one standard cultivar. Field experiment was conducted in three growing seasons (2012/13, 2013/14 and 2014/15) on the experimental field of Center for Small Grains in Kragujevac (Serbia). Some grain quality parameters (hectoliter weight and 1000 grain weight) were analyzed in this paper. In average for three years, values of hectoliter weight varied from 76.65 kg hl-1 (KG-60-3/3) to 80.05 kg hl-1 (KG-1/6). The analyses of variance showed highly significant differences in hectoliter weight between genotypes (F=4.554**) and investigated years (F=150.082 **), but interaction genotype x year was significant (F=1.629*). The highest values of 1000 grains weight expressed line KG- 52/23 (46.75 g) and the lowest line KG-28/6 (39.90 g). Compared to the standard cultivar Pobeda, 10 genotypes had higher values of 1000 grains weight. There were highly significant differences in the weight of 1000 grains among genotypes (F=25.011**), investigated years (F=117.267**), as well as their interaction (F=8.684**).