Browsing by Author "Elis, Seval"

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Non-Destructive Chlorophyll Meters: A Comparison of Three Types of Meters for Grain Yield Estimation of Durum Wheat Under Semi-Arid Environments
(2025) Kızılgeçi, Ferhat; Ozkan, Remzi; Yıldırım, Mehmet; Elis, Seval; Bayhan, Merve; Mokhtari, Negar Ebrahim Pour
Optimizing management practices to maximize crop yield and efficiency necessitates real-time monitoring of plant growth throughout the growing season. Utilizing spectral indices, such as normalized difference vegetation index, SPAD chlorophyll meter readings, and the CM-1000 chlorophyll meter, can provide quantitative data to aid in making informed management decisions. This study investigated the relationships between spectral indices (NDVI, SPAD, CM-1000) and grain yield in five durum wheat genotypes under semi-arid conditions. Spectral indices were taken at three growth stages: heading, anthesis, and maturity. Our findings revealed significant variations in spectral reflectance values among the genotypes and across growth stages. NDVI values were highest during the early growth stages and declined towards maturity. SPAD values also exhibited a similar trend, peaking at heading and anthesis. Chlorophyll content, as measured by SPAD readings, varied across growth stages, with different genotypes exhibiting peak chlorophyll content at different times. CM-1000 measurements showed significant differences among genotypes at all stages, with 'Fırat 93' and 'Hasanbey' generally exhibiting higher chlorophyll content. Correlation analysis revealed significant positive relationships between NDVI values at different stages, as well as between CM-1000 measurements and grain yield. Conversely, SPAD values showed a negative correlation with grain yield. These findings suggest that CM-1000 measurements could be a valuable tool for selecting high-yielding durum wheat genotypes under semi-arid conditions.
Assessment of Genetic Diversity and Fusarium Root Rot Response in Turkish Bread Wheat
(Springer, 2025) Sesiz, Ugur; Elis, Seval; Kizilgeci, Ferhat; Yildirim, Mehmet; Palacioglu, Gulsum
Understanding the genetic diversity and population structure of bread wheat germplasm is essential for effective breeding and conservation strategies. This study evaluated 96 bread wheat genotypes from Turkiye-including advanced lines, commercial cultivars, and landraces-using Start Codon Targeted (SCoT) and inter-Primer Binding Site (iPBS) retrotransposon markers. Six SCoT and four iPBS primers generated 81.32% and 75.59% polymorphic bands, respectively, producing clear and reproducible profiles. The average polymorphism information content was 0.19 for both marker systems, with resolving power values of 3.13 (SCoT) and 2.35 (iPBS). Unweighted pair group method with arithmetic mean (UPGMA) cluster analysis grouped the genotypes into two major clusters with 41% overall similarity. Principal coordinate analysis (PCoA) clearly illustrated the genetic differentiation among the genotypes. Analysis of molecular variance (AMOVA) revealed that 69% of genetic variation was distributed within populations. Pathogenicity assays revealed differential disease responses among 21 genotypes to Fusarium culmorum isolate, with the cultivar Empire exhibiting moderate resistance. SCoT and iPBS markers effectively revealed genetic variation and supported the exploitation of promising genotypes for resistance breeding. The identification of genetically distinct and moderately resistant genotypes underscores the potential of Turkish wheat germplasm to support future breeding efforts.
Citation - WoS: 1
Citation - Scopus: 1
Changes in Quality Components of Durum Wheat Genotypes Under Temperature Stress and Sufficient Rainfall Conditions During the Growth Period
(Publ House Bulgarian Acad Sci, 2024) Elis, Seval; Yildirim, Mehmet
A combination of genetic makeup and environmental factors determine the quality characteristics of durum wheat. Specifically, environmental stressors, such as extreme temperature fluctuations, can have a substantial impact on the productivity and quality of wheat crops. The effect of terminal temperature stress on yield and quality in durum wheat genotypes grown during 2019 and 2020 seasons was studied. These characteristics include thousand kernel weight, protein content, hectoliter weight, wet gluten content, Zeleny sedimentation value, and grain colour. The first year of the study was warmer than the second, resulting in decreased kernel weight, hectoliter weight, and gluten values, as well as increased protein content and Zeleny sedimentation values. This indicates that temperature stress leads to a higher protein content. The study also showed considerable variation in quality traits among genotypes, with certain genotypes demonstrating greater stability in specific quality traits. Genotype by environment interaction significantly affected grain weight, protein content, gluten content and Zeleny sedimentation. These data indicate that temperature stress plays an important role in determining the quality characteristics of durum wheat. Future studies should focus on mitigating the adverse effects of terminal temperature stress and improving the generation of genotypes with optimal quality traits.
The Impact of Nano Processed Cattle Manure Combinations on the Yield and Quality Changes of Cotton
(Ankara Univ, Fac Agriculture, 2025) Elis, Seval
Sustainable agriculture necessitates the exploration of organic fertilizers to promote both crop productivity and soil health. The objective of this two-year study was to evaluate the effects of different combinations of processed cattle manure on the yield and quality of cotton crops, with a focus on determining the optimal dosage of these fertilizers. Parameters including seed cotton yield, lint yield, ginning percentage, and physiological traits such as chlorophyll content and normalized difference vegetation index (NDVI) were analyzed. Results revealed significant differences in yield and physiological traits among fertilizer treatments. Notably, combinations involving cattle manure as base fertilizer exhibited superior performance compared to synthetic fertilizer alone. The application of 230 kg da-1 of cattle manure as base fertilizer, in particular, resulted in optimal yield and quality, highlighting the potential of organic fertilizers in enhancing crop productivity. While synthetic fertilizers tended to enhance chlorophyll content, cattle manure applications promoted a more balanced improvement in yield components without compromising plant vigor. Integrating processed cattle manure into fertilizer regimes emerges as a promising strategy for sustainable cotton production. The dose of processed manure fertilizer will provide ten times less use than the dose of normal manure fertilizer. This will make the use of manure fertilizers more active and the use of organic fertilizers more widespread.
Citation - WoS: 1
Citation - Scopus: 1
Impact of Heat Stress on Yield Potential of Durum Wheat Genotypes
(Pakistan Agricultural Scientists Forum, 2024) Elis, Seval
Heat stress during plant growing cycle is a critical factor affecting wheat production. The primary objective of this research is to assess the impact of heat stress on key agronomic traits of durum wheat, including grain yield, heading and ground cover ratio. The study was conducted over two consecutive cropping seasons (2019 and 2020) under rain-fed conditions. Twenty durum wheat lines and varieties were used as the research materials. The genotypes experienced significant heat stress from vegatative to reproductive period. Heat stress during plant growth is critical for wheat grain yield and quality but heat stress effects vary between genotypes depending on their stress tolerance level. The study demonstrated the potential of NDVI as a reliable indicator that can be used to evaluate the crop yield performance under temperature stress conditions. This supported by strong relationships between grain yield and NDVI. The association of estimated maximum ground cover (EMC) with earliness indicates that early soil surface closure is related to rapid growth rate. According to ground cover estimations, early ground cover and fast plant growth were related to earliness and plant height, respectively. This study reveals significance of identifying and selecting durum wheat genotypes with good stability under heat stress, aiming to development of heat-tolerant varieties and ensuring more stable wheat production.
Genotype Responses of Barley for Crop Adaptability, Yield Variations and Quality Traits under Terminal Heat Stress Conditions
(Pontificia University Catolica Chile, Fac Agronomia ingenieria Forestal, 2025) Elis, Seval; Tanrikulu, Abdulkadir; Yildirim, Mehmet
Genotype Responses of Barley for Crop Adaptability, Yield Variations and Quality Traits under Terminal Heat Stress Conditions. Int. J. Agric. Nat. Resour. 148-163. Barley, a vital crop globally, faces increasing threats from rising temperatures and climate variability. The physiological and morphological characteristics of ten advanced barley lines and two cultivars were assessed in this study over a two-year period under rain-fed conditions. This research revealed significant variations in genotype performance under terminal heat stress. The results highlight that temperature stress exceeded critical thresholds during critical growth stages, impacting grain yield and quality. Genotypes such as 'IBON HI 16-12' displayed consistently high yields, whereas 'Kendal' showed adaptability across varying conditions. The leaf chlorophyll content (SPAD) and normalized difference vegetation index (NDVI) varied among the genotypes, and a high NDVI did not consistently lead to higher yields under heat stress conditions. Quality traits, including protein content, test weight, and thousand-kernel weight, fluctuated independently of yield. Canopeo measurements highlight rapid ground cover growth, emphasizing its importance for plant productivity. Genotypes with delayed heading and prolonged physiological maturity presented high yields under heat stress. Leaf area index (LAI) measurements may aid in the selection of heat-tolerant genotypes. Alternatively, Canopeo measurements at 85-95% coverage provide valuable data for assessing genotype performance. This study enhances our understanding of barley's response to heat stress, emphasizing genotype adaptability and the need for further research to address temperature-related yield variations.