The aim of this study was to assess the effect of two winter wheat species: Triticum aestivum ssp. vulgare, and Triticum spelta, cultivated in different percentage of cereals in crop rotation, on their bread making potential. The analyzed grain samples were obtained from a field experiment conducted during three years 2014-2016 at the Experimental Station in Osiny (51°35’, 21°55’), Institute of Soil Science and Plant Cultivation, State Research Institute, Puławy, Poland. The experiment was established following different percentages of shared cereals in crop rotation (SCCR): 50, 75 and 100%. Wheat cultivation was performed in accordance with good agricultural practice standards. Protein content, gluten content, Zeleny sedimentation index and alveograph properties were determined. Wheat species strongly influenced bread potential. The Triticum aestivum compared to Triticum spelta was characterized by significantly higher gluten quality and Zeleny sedimentation index as well as better alveograph properties. Common wheat showed the highest baking value (W). Spelt wheat was characterized by the lowest tenacity (P) and the highest extensibility (L). Moreover, the percentage of cereals in crop rotation had an effect on grain and dough quality parameters. Cultivation of wheat in 100% share of cereals resulted in the lowest grain and dough quality.

The objective of this work was to use the swelling curve test for the evaluation of the baking value of rye flours commonly used for bread production. Ten rye flours obtained from industrial mills were used for investigations. The parameters characterized the flour properties such as protein content, ash content, pentosans content, falling number, amylograph peak viscosity and water absorption were determined. Besides, the swelling curve test and the baking test were performed. The results showed significant relations between flour properties and bread quality. Especially, all viscosity parameters obtained on the basis of swelling curve could be used for rye flour baking quality evaluation. Especially, the logarithmic decrease of viscosity was negatively correlated with crumb bread hardness after 1 and 4 days after baking (r = - 0.802 and - 0.789, respectivietly). Besides, the breads with the lowest volume were obtained from flour with low amylograph peak viscosity and low logarithmic decrease of viscosity. In summary, the swelling curve test can be used as a useful tool for the evaluation of baking quality of rye flour.

The aim of this study was to evaluate the baking value of rye flours from industrial mills and to indicate which rye flour quality parameters are the most important predictors of wholemeal rye bread quality for commercially milled rye grains. Ten wholemeal rye flours, which were characterized by ash content ranging from 1.43% to 2.42% d.m. (dry mass), were used for the study. The parameters that characterize the flour properties and the baking test were assessed. The study revealed that for the analyzed commercial rye flours, the falling number test and the amylograph properties are insufficient parameters for predicting the quality of wholemeal rye bread. The manufacture of good quality wholemeal bread requires the use of rye flour with superior quality, such as fine granulation, low protein content, low total and insoluble pentosans content, and, in particular, a high percentage of water-soluble pentosans content. Breads with a higher volume were obtained from rye flours that were generally characterized by lower protein content, lower total and insoluble pentosans content, and higher water-soluble pentosans content. Flour granulation and the percentage of water-soluble pentosans content especially, had a significant impact on bread’s hardness of crumb and the hardness of crumb’s increase during bread storage.

Asparagine is one of the precursors of acrylamide that can form during bread production. The aim of this work was to determine the effect of genotype, environment, sulfur fertilization, and the interaction of those factors on the asparagine content, technological value of wheat, and acrylamide level in bread. The research material consisted of five wheat cultivars grown in two locations in Poland with nitrogen fertilization of 110 kg ha⁻¹ and sulfur fertilization of 30 kg ha⁻¹. The standard ISO method for analyzing the milling and baking properties of wheat was used. The UHPLC-MS/MS method for analyzing the amino acids and the GC/MS method for acrylamide in bread were implemented. The analysis of variance results indicated that the location influenced the total variance in the measured asparagine content and quality of wheat the most, followed by the cultivar and then by the interaction between the environment and cultivar. Sulfur fertilization had no significant effect on the asparagine content, but slightly lowered the gluten quality and loaf volume of bread. However, sulfur fertilization in connection with the cultivar characterized by low starch damage had a positive effect on lowering the acrylamide in bread. Asparagine content in wheat and acrylamide in bread varies mostly depending on cultivar and environment.

The properties of the starch-amylolytic complex of commercial low-extract rye flour were determined based on the traditional method, such as falling number and amylograph test as well as differential scanning calorimetry (DSC). The starch, pentosans and protein had a significant effect on the thermal properties of the tested rye flours. Based on the falling number, it was revealed that rye flours were characterized by medium and low alpha-amylase activity. The falling number and amylograph test are not sufficient methods to determine the suitability of currently produced rye flours for bread making. The gelatinization process of the rye flour starch could be evaluated by the DSC test, which, together with the falling number and amylograph test, may allow a better way to evaluate the usefulness of rye flours for bread making. Many significant correlations between parameters determined by DSC endotherm and quality parameters of rye bread, such as volume and crumb hardness, were reported. Breads made from flour with higher enthalpy in DSC were characterized by higher volume and softer crumb.