533 The Reactions of Bread Wheat Lines Against Stem (Black) Rust (Puccinia graminis F. Sp. tritici) Population Kadir AKAN 1* , Alaettin KECELI 2 1 2 Pamukkale University, School of Applied Sciences, Organic Farming Business Management Department, Denizli, Turkey *Corresponding author: alaettink@pau.edu.tr Abstract: Quality parameter is very important selection for bread wheat improve programme. Yield trials were evaluated in terms of some physical characteristics, the amount of protein, its quality and some gluten rheological parameters. Stem rust (Puccinia graminis f. sp. tritici, (Pgt) can occur at higher altitudes and coastal areas in Turkey. On the other hand, stem rust is unfavorable for wheat quality to susceptible cultivars. 26 bread wheat genotypes (mixographe class; 3-6, (Bezostaja-1; 5) in yield trials were developed by the Central Research Institute for Field Crops (CRIFC) Department of Quality Assessment and Food. The aim of this study was to determine the reactions of 26 winter bread wheat lines to stem rust disease in adult plant stage. The test materials were sown in a one-meter row with 2 replications in Seydiler, Kastamonu Province. The test materials were screened under natural epidemic condition with Pgt (virulent on: Sr5, 6, 7b, 8a, 8b, 9b, 9g, 10, 30, Tmp and Mcn resistance genes). Stem rust developments on each entry were scored using the modified Cobb scale (Susceptible control cv. Little Club 80-100S) in June-August 2015. Coefficients of infections were calculated, and the values below 20 were considered as resistant to disease. Five (14%) genotypes were resistant to Pgt. These resistance genotypes can be used in both quality and stem rust resistance breeding programs to stem rust reactions. Keywords: Bread wheat, stem rust (Puccinia graminis f. sp. tritici), reaction test, quality 1.INTRODUCTION Wheat (Triticum sp.) is among the strategic crops for the both world and Turkey. Because of the important area of growing, even a slight increase yield for per unit can cause significant increases in total production. On the other hand, the yield and quality of wheat can affect everybody economically from producer to consumer. For this reason, solving the problems of wheat from production to consumption is very important in terms of influencing the country's economy and producer-consumer income levels due to the fact that a certain amount of wheat is being produced, the reactions that have shown against the quality and stress factors of the wheat have started to become an important improvement criterion. Selection of early generation material with different and reliable methods in breeding programs ensures that the breeder reaches its purpose in a short time and more surely. If the wheat breeding studies are thought to last about 16 years, the earlier the material that is not suitable is removed in the early generations, the more material and detailed work can be done with the other material and the less time, money and labor can be achieved. The quality criteria used in this part of the study; Hectorite weight, zeleny sedimentation and mixograph. In addition to efforts to improve quality attributes, at every stage, it is desirable in all respects to completely eliminate or partially reduce the production factors and stress that may affect quality. Fungal diseases play an important role in the biotic stress factors that predominate in wheat growing areas. It is reported that the losses that can occur as a result struggle for the control of stem rust disease are proposed, the preferences of producers are usually in favor of chemical warfare. Some important disadvantages can be encountered as a result of chemical treatment applications. One of the cheapest and most practical control methods that can be used by producers, is protection of natural environment, genetic l., 2007). 26 bread wheat genotypes (mixographe class; 3-6, (Bezostaja-1; 5) which were developed by the Central Research Institute for Field Crops (CRIFC) Department of Quality Assessment and Food were used in this study. The aim of this study was to determine the reactions of 26 winter bread wheat lines to stem rust disease in adult plant stage. 2.MATERIALS AND METHODS Quality Studies Hectoliter weight test: Refers to the weight of 100 liter of wheat in kg. It is a criterion used in the classification of wheat and it is directly related to flour yield. Grain size, density, shape and homogeneity affect the hectoliter weight. Zeleny sedimentation test: Zeleny sedimentation test was carried out according to Anonymous (1972). The principle of the zeleny sedimentation test is to swell the flour particles in the suspension prepared with the flour and lactic acid brought to you by CORE View metadata, citation and similar papers at core.ac.uk