Browsing by Author "Olmez, Fatih"

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Citation - WoS: 0
Citation - Scopus: 0
Development of Bread Wheat Lines Resistant To Warrior Yellow Rust (puccinia Striiformis F. Sp. Tritici) in a Short Time With the Use of Biotechnological Methods
(Springer Heidelberg, 2024) Kızılgeçi, Ferhat; Karaoglu, Cuma; Olmez, Fatih; Kizilgeci, Ferhat; Cetiner, Buket; Turgay, Emine Burcu; Aydogan, Sinan; Department of Seed Production / Tohumculuk Teknolojisi Bölümü
During the production of bread wheat (Triticum aestivum L.), many diseases affect the yield and quality. One of the most important of these is yellow rust (Puccinia striiformis f. sp. tritici). When this disease creates an epidemic, it causes significant economic losses in wheat. Fungicides are widely used in disease control. In order to reduce the use of fungicides, the breeding of resistant cultivars, which is an environment-friendly and farmer-friendly approach, and the use of these cultivars in production are of vital importance. It is known that the Warrior race of yellow rust, which emerged in Europe in 2011, has overcome many important resistance genes except Yr-15, and wheat cultivars carrying those genes became susceptible. In this study, Yr-15 resistance gene was transferred to Tosunbey, which has high bread quality, with the help of KASP markers and homozygous DH lines were obtained using anther culture. Eighty-four of these lines were taken to the preliminary yield trial together with the Tosunbey standard cultivar. These lines were tested for grain yield, end-use quality and resistance to yellow rust. According to the trial results, 17 promising lines were selected among the Tosunbey-derived Yr-15 lines for advancement in a short period of totally 3 years. If one or more of these selected lines are registered, it will make a significant contribution to both the environment and the country's economy.
Citation - WoS: 0
Citation - Scopus: 1
Molecular Screening of Septoria-Resistant Genes in Historical Turkish Bread Wheat Germplasm Using the Validated Gene Specific Ssr Markers
(Tubitak Scientific & Technological Research Council Turkey, 2025) Ali, Amjad; Olmez, Fatih; Tatar, Muhammed; Mortazavi, Parnaz; Altaf, Muhammad Tanveer; Turgay, Emine Burcu; Baloch, Faheem Shehzad
Septoria tritici blotch (STB), caused by Zymoseptoria tritici, poses a significant threat to global wheat production, particularly in Turkiye. Resistance breeding is the most sustainable and effective disease control method. Molecular markers, especially simple sequence repeat (SSR) markers are extensively employed in wheat breeding to enhance the efficacy. The primary objective of this study was to identify Stb resistance genes among 143 historical registered Turkish bread wheat genotypes released as commercial cultivars between 1963 to 2014, using 16 closely linked SSR markers. The findings revealed substantial genetic variation among the screened cultivars, with the Stb3 gene being the most prevalent, identified in 89.51% of the samples. Other notable resistant genes included Stb13 (71.32%), Stb4 (43.33%), and Stb11 (41.25%). Cultivars Porsuk-2811, Porsuk-2853, and Porsuk-2868 exhibited the highest level of resistance to STB, with 10 resistance genes detected. Of the 143 cultivars screened, 10 were found to carry a total of nine Stb genes, while two cultivars were observed to possess only a single resistance gene. The study identified 23 wheat cultivars harboring 8-10 Stb resistance genes, which are highly recommended for future wheat breeding programs and gene pyramiding strategies to combat Z. tritici. This research provides critical insights for national breeding programs, supporting the development of resilient and high-yielding wheat varieties resistant to STB.