The most important selection criteria in winter wheat breeding for grain quality

The quality of wheat grain largely depends on the hereditary characteristics of the variety. In 2018-2020, in the North Caucasus Federal Agricultural Research Center, studies were carried out to search for source material among the diversity of genotypes of common winter wheat at the early stages of the breeding process to select the most promising in the context of grain quality. The soil of the experimental plot is ordinary medium-thick low-humus medium loamy chernozem. The climate of the zone is temperate continental. According to long-term data, the annual sum of effective temperatures is 3177.2 °C; average annual precipitation is 559.6 mm; Selyaninov's hydrothermal coefficient (HTC) is 1.06. Before sowing, complex mineral fertilizers were applied at a dose of N40P60K40; in spring, ammonium nitrate – 26 kg of active ingredient per ha. Fifteen lines of common winter wheat selected according to a complex of breeding valuable signs (yield, resistance to diseases, frost and winter hardiness, drought resistance) served as a material for the studies. Lines were compared with the standard variety ‘Aivina’ according to the most important criteria: gluten mass fraction and quality, protein mass fraction and sedimentation value. Four wheat lines (21663, 20029, 21728, 21944) characterized by gluten of I and II group (gluten content from 23 % to 25.7 %) were identified. They exceeded the standard by 2.0–4.7% and corresponded to the 3 class of grain quality. In line 21944, minor variability of the protein amount (10 %) in the grain by year was noted; in the lines 21226, 21924 and 20029 ‒ average (14.2‒18.7 %); in the rest genotypes, including standard, it was significant (20.1‒34.3 %). On average, over the years of studying, six lines (21420, 21663, 21683, 21118, 21944, 21924) were classified as strong wheat (sedimentation value was in the range of 51‒62 ml). The flour strength of the ‘Aivina’ wheat grain had an average sedimentation value – 49 ml. Lines 21944 and 21924, which exceeded the standard, can be used as sources of high-quality grain when creating new varieties of common winter wheat for regions with a dry period of grain formation.

Stability analysis for quality attributes in durum wheat (Triticum durum L.) genotypes

Wheat contributes more than 50% of calories to the people worldwide. In terms of appearance, colour, texture and flavor, the quality is determined by raw material, processing methods and other ingredients. The glutenin and gliadin proteins influence dough properties. Thirty-six durum wheat genotypes were evaluated for various quality traits viz. grain appearance score, grain hardness, sedimentation value and wet and dry gluten content. The superior genotypes for the physical characteristics of grains were PDW 337, UAS 448 and PDW 335. Wet and dry gluten were maximum in UAS 448 and WHD 954. PDW 337 (44 ml) and DDW 27 (44 ml) had highest sedimentation value. Present study reveals the identification of superior durum wheat genotypes which may be used in future breeding programmes to enhance the quality for human nutrition and specific end-uses.

Ekmeklik Buğdayda (Triticum aestivum L.) Başaklanma Döneminde Toprak ve Yapraktan Uygulanan Ürenin Tane Verimi ve Kalite Özellikleri Üzerine Etkisi

This study was conducted during two crop seasons to investigate the effect of nitrogen fertilizer quantity and application form on grain yield and quality in Eskisehir Transitional Zone Agricultural Research Institute by using seven bread wheat cultivars in rainfed and eight in irrigated conditions. In the study, urea as a source of nitrogen was applied in heading time (Zadoks 59) in granular and foliar form. In all treatments grain yield, some technological quality characteristics were determined of the genotypes. In both conditions while sedimentation value, protein content, aggregation energy (AGGEN) and maximum torque (BEM) values increased, peak maximum time (PMT) decreased with foliar urea applications. it was determined that there were statistically significant differences between the varieties in terms of SDS sedimentation values in both rainfed and irrigated conditions. In this study, In irrigated and rainfed conditions the values obtained from foliar urea applications compared to granular ones with relation higher bread quality in the genotypes which contain Glu-A1 locus 2* subunit; 9% for grain yield, 6.5% for protein content, 17.0% for sedimentation value and 3.8% increase of BEM, Glu-D1 locus; 5+10 subunit 8% for grain yield, 5.6% for protein content, sedimentation 16.0%, 6.4% for BEM increase, for Glu-B1 locus; 7+9 subunit 7.0% for grain yield, 6.0% for protein content, 19.6% for sedimentation value, and 7.2% for BEM value increase. This study was observed that the foliar application during the heading time provided the improvement of bread wheat grain yield and quality characteristics.

Climatic Effects on Quality Parameters and Their Relationships of Bread Wheat Genotypes (Triticum aestivum L.) Grown under Semi-arid Region

Aims: This study was conducted to determine climatic effects to quality parameters of bread wheat genotypes grown in the semi-arid region. Study Design: The experiment was carried out in a randomized complete block design with three replications. Thirty-three bread wheat genotypes (Triticum aestivum L.) were grown in a field trial and kernel samples analyzed for thousand kernel weight, test weight, protein content, wet gluten, dry gluten and SDS-sedimentation value. Place and Duration of Study: The research was carried out during the 2008 and 2009 growing seasons at Sanliurfa, Turkey. Methodology: For analyses 20 main spikes that contained fully developed kernels were chosen randomly from each plot and taken to the laboratory for analyses. The nitrogen content of kernels was determined using the Kjeldahl method and the result was multiplied by the factor 5.7 to calculate the protein content of kernels. Test weight and Sodium Dodecyl Sulphate (SDS)-sedimentation values were determined using standard procedures. Wet and dry gluten values were determined using a glutomatic system after separating gluten from the soluble starch and protein fractions. Results: Genotypes were significant (P ≤ 0.01) for all tested characteristics. Thousand kernel weight ranged from 25.8 to 42.3 g, test weight from 73.7 to 81.7 kg hl-1, protein content from 9.7 to 14.8%, wet gluten from 28.5 to 42.2%, dry gluten from 9.4 to 14.1% and SDS-sedimentation value from 19 to 39 ml. Bezostaya-I, Kutluk-94, Altay-85, Harmankaya-99, Lirasa, Kirgiz-95 and Dagdas-94 genotypes had the best quality among tested genotypes in the semi-arid climatic conditions. Protein content was positively correlated with wet gluten, dry gluten and SDS-sedimentation value, respectively. Relationships were significant between wet gluten and both dry gluten and SDS-sedimentation value. A positive significant correlation was found between thousand kernel weight and SDS-sedimentation value and between dry gluten and SDS-sedimentation value. Conclusion: Protein content, wet and dry gluten and SDS-sedimentation value were affected by climatic conditions of semi-arid region. Protein content, wet and dry gluten value were high but SDS-sedimentation value were low due to high temperature and low precipitation in semi-arid region.

Mineral Composition and Baking Value of the Winter Wheat Grain under Varied Environmental and Agronomic Conditions

The mineral composition of cereal crops, the technological value of grain and flour, as well as bread quality are affected by the genotype, environment, and agronomic management practices. The aim of the research has been to investigate the effect of the environment and agronomic factors on the mineral composition and baking value of winter wheat grain. Opal cultivar grain of the genetically determined prime-quality wheat was obtained in a two-year field experiment (varied soil and weather). The agronomic management practices included tillage (conventional moldboard-plow, reduced ploughless, and strip-till) and nitrogen fertilisation rate (100 kg·N·ha−1, 200 kg·N·ha−1). In the grain samples, the content of macronutrients was assayed: P, K, Mg, Ca, and Na, total protein, and wet gluten as well as sedimentation value. The colour and the water absorption of flour and its content of protein and ash were determined. Laboratory baking was performed. It was found that the content of protein and gluten in grain, sedimentation value, bread volume, and weight changed depending on the environmental conditions and research years. Tillage and nitrogen rate, despite an effect on the properties of grain and flour, did not differentiate, however, the bread quality. The environmental conditions and agronomic management practices did not have a significant effect on the content of mineral nutrients in grain, except for calcium. The biofortification with mineral nutrients in prime-quality winter wheat cultivar grain by selecting the environmental and agronomic conditions seems more difficult than increasing the content of organic compounds and enhancement of flour and bread parameters.

Development of common wheat lines with the 1BL/1RS translocation linked with the allele Glu-B1al

A number of F6 winter common wheat lines that carry the wheat-rye 1BL/1RS translocation of the Kavkaz type with respective resistance genes linked with high bread-making quality allele Glu-B1al have been developed via marker selection among F2 plants from the cross B16 × Odesskaya krasnokolosya. The SDS-sedimentation value in these lines proved to be in most cases similar to that of the cultivar Bezostaya 1. The lines may be used as a source of the 1BL/1RS translocation linked with the high-quality allele Glu-B1al, which compensates for the negative effect of this translocation on bread-making quality.

Development of common wheat lines with the 1BL/1RS translocation linked with the allele Glu-B1al

A number of F6 winter common wheat lines that carry the wheat-rye 1BL/1RS translocation of the Kavkaz type with respective resistance genes linked with high bread-making quality allele Glu-B1al have been developed via marker selection among F2 plants from the cross B16 × Odesskaya krasnokolosya. The SDS-sedimentation value in these lines proved to be in most cases similar to that of the cultivar Bezostaya 1. The lines may be used as a source of the 1BL/1RS translocation linked with the high-quality allele Glu-B1al, which compensates for the negative effect of this translocation on bread-making quality.

Numerical Analysis of Tunnel Running through Bridge Pile Foundation

Based on the background of Dalian subway running through bridge pile foundation, a 3d numerical model is built by the finite element software MIDAS/GTS in order to research the laws of the internal force and the displacement of the pile and soil during the Construction process. The outcome reflects that the sedimentation value of the top of the pile is bigger than others. Because the bigger thrust about the shield machine, the horizontal displacement of the pile is increasing at first and decreasing at last from a positive into a negative. Because of the loss of the soil, the soil beside the pile collapses and causes strong friction force. The surface sedimentation value which is near the central line of the tunnel is bigger than other place. This paper is of good reference roles in the similar underground engineering in Dalian.

Analysis of Tunnel Running through Bridge Pile Foundation Based on the MIDAS/GTS

Based on the problem of tunnel running through bridge pile foundation, a 3d numerical model is built by the finite element software MIDAS/GTS in order to research the internal force and the displacement of the pile and soil during the Construction process. The sedimentation value of the top of the pile is bigger than others. Because the bigger thrust about the Shield machine, the horizontal displacement of the pile is increasing at first and decreasing at last from a positive into a negative. Because of the loss of the soil, the soil beside the pile collapses and causes strong friction force. The surface sedimentation value which is near the central line of the tunnel is bigger than other place. This paper is of good reference roles in the similar underground engineering in Dalian.