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Koleksiyondaki öğeler
- MakaleAçık Erişim2020Scopus SJRQ3Investigating the adipokine and cardiac troponin response ın experimental thyroid dysfunction; [Odgovor adipokina i srčanog troponina na eksperimentalno izazvanu disfunkciju štitne žlijezde brojlera]
Bayraktar, Bülent; Tekce, Emre; Takma, Çiğdem; Bayraktar, Sevil; Kilinç, Ayten A.; Ülker, Ufuk; Kurtdede, Efe
This study was conducted to investigate adipokine [Apelin and brain-derived neurotrophic factor (BDNF)] and cardiac troponin (cTnI) response that emerged after adding an essential oil mixture (EOM) (Eucalytus glabutus labii, Thymus vulgaris, Cymbopogon nardus, and Syzygium aromaticum) at different rates to the drinking water of broilers in which thyroid dysfunction (hypo-and hyperthyroidism) had been experimentally induced. In the present study, 150 1-day-old Ross-308 male broiler chicks were used. They were divided into five groups, each with 30 animals. The groups were designed to include five subgroups: control (C), hypothyroid, hypothyroid + 250 ppm EOM, hyperthyroid, and hyperthyroid + 250 ppm EOM, with six animals in each group. At the end of the experiment, Apelin, p-BDNF, cTnI, T3, T4, and thyroid-stimulating hormone (TSH) levels were investigated in blood serum samples obtained by cervical dislocation from four randomly selected animals from each subgroup, making 100 animals in total. It was found that EOM administration resulted in a dose-dependent increase in p-BDNF and apelin levels, and a decrease in T4 levels in the experimentally induced hypo-and hyper-thyroidism groups, but did not affect T3 and cTnI levels. Conversely, an increase in TSH level was observed in the hypothyroidism groups, whereas a decrease was observed in groups with hyperthyroidism. This study is the first to examine adipokine (Apelin and BDNF) and cTnI response to EOM administration in thyroid dysfunction.
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İncele - MakaleAçık Erişim2021Scopus SJRQ3An application of finite element method in material selection for dental implant crowns
Sensoy, Abdullah T.; Çolak, Murat; Kaymaz, Irfan; Findik, Fehim
Materials used for dental crowns show a wide range of variety, and a dentist's choice can depend on several factors such as patient desires, esthetics, tooth factors, etc. One of the most important issues for implant surgery is the primary stability and it should be provided to minimize the risks of screw loosening, failed osseointegration, or nonunion. The current study aims to present the Finite Element Analysis (FEA)-based material selection strategy for a dental crown in terms of reducing the aforementioned risks of dental implants. A virtual surgery mandible model obtained using MIMICS software was transferred to the ANSYS and material candidates determined using CES software were compared using FEA. The results indicated that Zr02+Y2O3 (zirconia) has shown a 12.79% worse performance compared to Au83-88/Pt4-12/Pd4.5-6 alloy in terms of abutment loosening. On the other hand, zirconia is the most promising material for dental crowns in terms of the stability of the bone-implant complex. Therefore, it may show the best overall performance for clinical use. Moreover, as suggested in this study, a better outcome and more accurate predictions can be achieved using a patient-specific FEA approach for the material selection process.
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İncele - MakaleAçık Erişim2022Scopus SJRQ2Androsace artvinensis sp. nov. (Primulaceae): A new species from northeastern Anatolia, Turkey
Sefali, Abdurrahman; Yapar, Yakup
Androsace artvinensis (Primulaceae) from Artvin province (northeastern Anatolia) has been described as a new species to science. The new species is morphologically similar to A. armeniaca var. macrantha but differs from it by several morphological characters, such as bracts shape, calyx (calyx length and lobes), corolla (corolla length, lobes, and indumentum), hairs, leaves, pollen features, and habitat preference. Diagnostic morphological characteristics, a full description, and a distribution map are provided.
AtıfScopus3WoS3OpenAlex2İncele - BildiriYalnız künye2022SpectrumChain: An Efficient Spectrum Management Framework in Blockchain-Enabled Flexible SDONs
Guler, Evrim; Karakus, Murat; Uludag, Suleyman
Huge potentials of optical networks provide an excellent choice in meeting the exponential growth in bandwidth demand. In particular, Elastic Optical Networks (EONs), with its promising potentials in increased availability, failure resilience, load-balancing, new use cases for on-demand opportunities, and efficient resource allocations, are good candidates for the future high-speed networks. When EONs are augmented with the emerging Software Defined Networking (SDN), that decouples the data and control planes, an agile and synergistic combination emerges under a general term of SDN-based optical networking (SDON), albeit with operational challenges. In this paper, we introduce a blockchain-enabled QoS-based inter-Internet Service Provider (ISP) routing coordination framework for SDONs, SpectrumChain (SC), to eliminate centralized mediators and reduce QoS signaling overhead. Experimental results show that the SC framework can effectively handle the QoS-enabled inter-ISP routing in SDON architecture in terms of flow setup time, message overhead, and requests serviced as compared to the traditional approaches.
AtıfScopus6WoS5OpenAlex6İncele - MakaleAçık Erişim2022Scopus SJRQ1High optical response NiO, Pd/NiO and Pd/WO3 hydrogen sensors
Çoban, Ömer; Tekmen, Süleyman; Gür, Emre; Tüzemen, Sebahattin
In this study, NiO and WO3 oxide semiconductors were fabricated on glass substrates by RF Magnetron Sputtering technique. Structural and optical characterizations of the semiconductors were performed using XRD, SEM, and optical absorption measurements. NiO and WO3 thin films were occasionally coated with palladium. In order to investigate the optical response of these semiconductors under hydrogen gas exposure, an optical gas sensor test system was installed and programmed. In both of the coated and uncoated cases, optical absorption changes due to hydrogen gas exposure on the surface were investigated. It was observed that these changes occur between 450 and 850 nm wave lengths range. The absorption in the NiO semiconductor was reduced between these wave lengths, while the absorption was increased in the WO3 semiconductor. In the uncoated state, only NiO gave an optical response to hydrogen gas. While the palladium coated NiO (Pd/NiO) sensor had the best response and recovery times of respectively 70 s and 206 s for 2% fraction of H2 gas at 300 °C constant temperature, the Pd/WO3 sensor gave the best response time of 340 s. Palladium coating resulted in approximately 150% increase in the responses of the NiO sensors at higher H2 concentration. The lower limit of H2 sensing of the Pd/NiO sensors at 300 °C was at the H2 fraction of 0.05%, while for Pd/WO3 sensors this value was 0.025%.
AtıfScopus26WoS25OpenAlex26İncele - MakaleYalnız künye2020Scopus SJRQ1Simulation and optimization of gamma-ray linear attenuation coefficients of barite concrete shields
Şensoy, A.T.; Gökçe, H.S.
The remarkable increment in radioactivity risks of today's industrial world is required to the efficient design of shielding structures. In the present study, the optimal design parameters of barite concrete shields for providing the highest gamma radiation shielding capability were researched by using a hybrid technique of the Box-Behnken Design based response surface method and Particle Swarm Optimization. Barite aggregate fraction, water-to-cement ratio and cement content of the shields were limited as 0:100 (by weight), 0.30:0.70 (by weight) and 200:600 (kg/m3) in the optimization problem, respectively. The regression equation derived from the regression learning process presented an excellent correlation to define the XCOM linear attenuation coefficients. A nonlinear response surface fitted to the regression equation was used as the validation of the PSO results obtained from MATLAB. The results of this study have shown that the proposed method provides satisfactory predictions for the barite concrete radiation-shielding capability depending on the design parameters. In addition, it was found that the linear attenuation coefficient could be increased by 102% by the design of the best shield according to the poorest mixture.
AtıfScopus77WoS66İncele - MakaleAçık Erişim2020Scopus SJRQ2A mathematical model and tabu search algorithm for multi-manned assembly line balancing problems with assignment restrictions
Yilmaz, Hamid; Yilmaz, Mustafa
A multi-manned assembly line is a set of workstations where task operations can be performed on multiple sides of the line. Such assembly lines are important for large products, such as buses, cars and trucks. In this study, a mathematical model for multi-manned assembly lines with assignment restrictions is proposed. The purpose of the mathematical model is to minimize the total number of workers and open multi-manned workstations along the line for a given cycle time simultaneously under various assignment restrictions. The model provides a more realistic situation for multi-manned assembly line problems. The tabu search algorithm (TSA) is also used to solve the problem. The performances of both methods on well-known data-set problems are analysed. Based on the computational experiments, the performance of the proposed TSA is compared with the mathematical model solutions on various problem instances. The experimental results verify the effectiveness and efficiency of the proposed TSA.
AtıfScopus33WoS28OpenAlex33İncele - MakaleYalnız künye2020Scopus SJRQ2Examination of analytical and finite element solutions regarding contact of a functionally graded layer
Yaylacı, Murat; Adıyaman, Gökhan; Öner, Erdal; Birinci, Ahmet
In this study, the continuous and discontinuous contact problems of functionally graded (FG) layer resting on a rigid foundation were considered. The top of the FG layer was loaded by a distributed load. It was assumed that the shear modulus and the density of the layer varied according to exponential functions along the depth whereas the the Poisson ratio remained constant. The problem first was solved analytically and the results were verified with the ones obtained from finite element (FE) solution. In analytical solution, the stress and displacement components for FG layer were obtained by the help of Fourier integral transform. Critical load expression and integral equation for continuous and discontinuous contact, respectively, using corresponding boundary conditions in each case. The finite element solution of the problem was carried out using ANSYS software program. In continuous contact case, initial separation distance and contact stresses along the contact surface between the FG layer and the rigid foundation were examined. Separation distances and contact stresses were obtained in case of discontinuous contact. The effect of material properties and loading were investigated using both analytical and FE solutions. It was shown that obtained results were compatible with each other.
AtıfScopus71WoS72OpenAlex22İncele - MakaleYalnız künye2022Scopus SJRQ4The mediating role of self-efficacy between emotional intelligence and job satisfaction of primary school teachers; [Le rôle médiateur de l'auto-efficacité entre l'intelligence emotionnelle et la satisfaction au travail des enseignants du primaire]
Sökmen, Yavuz; Sarikaya, İsmail
Introduction: In this study, it was analyzed whether self-efficacy has a mediating role between the emotional intelligence and job satisfaction of primary school teachers. Objective: It is to test the relationships between primary school teachers job satisfaction, self-efficacy and emotional intelligence levels. Method: A path analysis was performed on a sample of 252 primary school teachers. Results: It was found that self-efficacy mediated the relationship between emotional intelligence and job satisfaction. Conclusion: Based on the findings of the study, the relationships between emotional intelligence, job satisfaction and self-efficacy were discussed in the literature and various suggestions were made to concerned future researchers and practitioners.
AtıfScopus15WoS7OpenAlex17İncele - MakaleAçık Erişim2020Scopus SJRQ2Experimental investigation of effects on performance, emissions and combustion parameters of biodiesel–diesel–butanol blends in a direct-injection CI engine
Örs, İlker; Sarıkoç, Selçuk; Atabani, A.E.; Ünalan, Sebahattin
This paper aims to asses and conduct a comparative analysis of fuel properties, performance, emissions and combustion characteristics of biodiesel produced from waste cooking oil (B100) as a cheap biodiesel feedstock, along with a binary blend of biodiesel–diesel (B20) and ternary blends of biodiesel–diesel–butanol as substitutions to diesel fuel. Although biodiesel and n-butanol have some negative impacts on engine performance parameters, they generally positively affect exhaust emission parameters compared to euro diesel. B100 caused an average reduction in brake power and exhaust gas temperature of 15.16% and 1.4%, respectively, although it increased brake specific fuel consumption on average by 14.09%, at full throttle under different engine load conditions. B100 decreased CO and HC emissions and smoke opacity by 65.4%, 61.07% and 54.94%, respectively. However, CO2 and NO emissions increased by 22.3% and 23.91%, respectively. Addition of n-butanol decreased some of the fuel thermo-physical properties such as density, viscosity and flash point. The average decreases in brake power when n-butanol was added were 6.17%, 7.49% and 11%, respectively, coupled with increases in specific fuel consumption of 6.25%, 8.96% and 14.29%, respectively. The addition of n-butanol decreased exhaust gas temperatures, CO, HC, NO and smoke emissions.
AtıfScopus41WoS33OpenAlex52İncele - MakaleAçık Erişim2020Scopus SJRQ1Antiamnesic effects of tofisopam against scopolamine-induced cognitive impairments in rats
Üçel, Umut İrfan; Can, Özgür Devrim; Demir Özkay, Ümide; Ulupinar, Emel
In this study, we investigated the potential therapeutic effects of tofisopam, a 2,3-benzodiazepine derivative anxiolytic, on cognitive deficits in rats with scopolamine-induced amnesia. Cognitive performance of the rats was investigated by using the Morris water maze and passive avoidance tests. Changes in motor activity were assessed by using the activity cage and Rota-rod tests and then morphological changes in the hippocampus were assessed via immunohistochemical stainings. The results indicated that scopolamine impaired learning and memory parameters in rats. Worsened cognitive performance, neuronal loss, and decreased hippocampal synaptophysin, Ki-67, and glial fibrillary acidic protein density were observed. Tofisopam administration at a dose of 50 mg/kg for seven days improved the impaired cognitive performance, enhanced the attenuated synaptic transmission in the hippocampus, increased proliferation in subgranular zones, and improved the decrease in astrocytes in amnesic rats. These findings point out the anti-amnesic effects of tofisopam with concomitant improvements in the hippocampal synaptogenesis, neurogenesis, and glial plasticity, for the first time. Presented beneficial effects of tofisopam on cognitive dysfunctions may have a notable clinical value considering the fact that one of the most important side effects of 1,4-benzodiazepines, which are classical anxiolytic drugs, is amnesia. However, these preclinical results need to be confirmed with further clinical studies, first.
AtıfScopus23WoS20OpenAlex22İncele - MakaleAçık Erişim2020Scopus SJRQ2Bioproduction, structure elucidation and in vitro antiproliferative effect of eumelanin pigment from Streptomyces parvus BSB49
Bayram, Sinan; Dengiz, Cagatay; Gerçek, Yusuf Can; Cetin, Idil; Topcul, Mehmet R.
In this study, the structure of the purified extracellular eumelanin pigment isolated from Streptomyces spp. was elucidated by detailed analysis via two different spectroscopic techniques (FT-IR and NMR). In vitro antiproliferative effects of eumelanin were evaluated on HeLa cell line. These experiments were carried out with the evaluation of the parameters including cell viability, cell index, and mitotic index. With the cell viability and cell index, IC50 concentration of eumelanin was determined as 10 μM. This result showed that the IC50 concentration of eumelanin decreased the values of cell viability, cell index and mitotic index. These changes are statistically significant (p ' 0.01). The ability of the dissolved eumelanin (250 μg mL−1) to scavenge free radicals was determined via DPPH and ABTS and was shown to be about 87.73% and 75.2%, respectively, compared with standard antioxidants. It was observed that dry weights of eumelanin yield among the selected strains ranged from 160 to 240 mg L−1. The strain with the highest production potential was selected for 16S rDNA sequence analysis and, accordingly, the selected strain BSB49 was identified as Streptomyces parvus and the sequence analysis results were deposited in NCBI under accession number MK894155.
AtıfScopus47WoS40OpenAlex48İncele - MakaleAçık Erişim2022Does inquiry-based learning model improve learning outcomes? A second-order meta-analysis
Öztürk, Bilge; Kaya, Metin; Demir, Mustafa
This research study aims to utilize a second-order meta-analysis procedure to synthesize the effects of inquiry-based learning model (IBLM) on learning outcomes. An extensive systematic review process resulted in the inclusion of 10 meta-analyses conducted between 2015 and 2022 with minimal overlap between primary studies. The results revealed that IBLM has a medium-level positive effect (d = 0.62) on learning outcomes. The analyses showed that mobile inquiry-based model, learning cycle model and conceptual change text model have high-level positive effect on learning outcomes. Moderator analyses revealed that the effect sizes were not significantly moderated by grade level, content area, location, quality, primary research report type, and publication bias. Limitations, educational implications, and directions for future research are provided.
AtıfScopus33OpenAlex47İncele - MakaleAçık Erişim2022Scopus SJRQ2Tepegöz: Bayburt’s Harsh Winter; [Bayburt’un Kara Kışı: Tepegöz]
Koç, Tuğba Akkoyun
Epics, in which various events such as war, famine, internal political conflicts, and natural disasters, have deep traces in the minds of nations and are conveyed through generations with mythological elements that are not too far from the Dede Korkut Stories. Mythic period traces found in the stories have formed a layered structure equipped with concentrated information. Although chronologically, the first layer is actually the last layer added, it is the most understandable and appealing layer to the general reader. The latter layers are much deeper because its context diverges a little further from the reader. In order to reach the deep structure, as aimed in this study, the method of discourse analysis, which focuses on the archeology of the text, is based on the dominance of the ideology on the text, and the perspectives of linguistic anthropology has been used; since the words and structures they form in the texts come into existence not by chance but by “selection”, These two fields of study are always in an interaction and exchange with each other. According to research, climate plays a very important role in the formation of civilization and interacts with their social, economic, and political elements. Thus, climate changes and their consequences (famine, migration, etc.), wars, important warriors, opinion leaders, and victories throughouth the world can be conveyed through literary texts. When the layered structure in the Tepegoz story is examined, the connection between climate-human interaction is clearly seen. In this context, the story where Basat killed Tepegöz, has been analyzed with the support of data from various disciplines such as environmental history, medicine, climatology, zoology, geology, geography, and toponym, in accordance with the interdisciplinary dimension of discourse analysis; as a result, the Tepegoz-harsh winter link was revealed. As per the concept of Tepegöz; it has been observed that there is reference to the long and harsh winters that prevent access to a healthy metabolism, accommodation, and eating, which are basic human needs. It is possible to assume that “fantastic” beings like Cyclops, which can be found in myths, epics, fairy tales and legends, express a non-human threat that brings human life to an end in various ways.
AtıfOpenAlex4İncele - MakaleAçık Erişim2019Scopus SJRQ1Production of skim milk powder by spray-drying from transglutaminase treated milk concentrates: Effects on physicochemical, powder flow, thermal and microstructural characteristics
Er, Betül; Sert, Durmuş; Mercan, Emin
The effects of transglutaminase (TGase) treatment of skim milk concentrates on physicochemical, powder flow, thermal, microstructural characteristics and protein profiles of skim milk powders (SMP) were investigated. Spray-dried SMP samples produced from milk concentrates were TGase-treated at enzyme concentrations of 0 (control), 0.020% (TG-20), 0.030% (TG-30) and 0.035% (TG-35). Lower particle size values were observed in TGase-treated samples. TGase treatment slightly decreased zeta potential and increased the a* value (redness) of SMPs. Up to a concentration of 0.030%, TGase treatment decreased caking characteristics and increased glass transition temperatures of samples. The TGase treatment above 0.035% significantly decreased cohesion index and compaction coefficient at different speeds. TG-35 showed free flowing flow behaviour depending on the cohesion index, whereas control, TG-20, and TG-30 showed easy flowing behaviour. SDS-PAGE analysis revealed that high molecular mass bands indicated cross-linking in TGase-treated milk powders.
AtıfScopus30WoS24OpenAlex31İncele - MakaleAçık Erişim2020Scopus SJRQ2Optimization of cryoprotectant formulation to enhance the viability of Lactobacillus brevis ED25: Determination of storage stability and acidification kinetics in sourdough
Gul, Latife Betul; Gul, Osman; Yilmaz, Mustafa Tahsin; Dertli, Enes; Con, Ahmet Hilmi
In this study, various kinds of cryoprotectant (skim milk, lactose, and sucrose) formulations were tested to enhance the survival of Lactobacillus brevis ED25 after freezing and freeze-drying. A Box–Behnken experimental design was used to optimize cryoprotective medium and the highest cell survival was observed with the 17.28% skim milk, 2.12% lactose, and 10% sucrose cryoprotectant as the optimum condition. The structural and physicochemical characteristics of freeze-dried powder were acceptable for application with regards to particle surface morphology, moisture and water activity (Aw), glass transition temperature (Tg), Fourier transform infrared spectra, X-ray structure, and also storage stability under the refrigeration and room temperature conditions. Accelerated storage test based on Arrhenius equation could be used to predict the freeze-dried bacterial shelf life but only with a certain degree of predictability for long-term storage. The acidification kinetics of fresh and stored culture in sourdough fermentation was also described on the basis of the Gompertz equation. Practical applications: Freezing and storage are crucial factors for the viability and acidification power of starter culture. Therefore, various types and concentrations of cryoprotectants have been used to preserve the microorganisms. L. brevis ED25 has been a good potential for the manufacture of industrial sourdoughs and this research has aimed to investigate long-term protective effects of optimum cryoprotectant formulations on the viability of bacteria and also determine the acidification power in sourdough. The results showed the potential value of freeze-dried L. brevis ED25 culture for commercialization.
AtıfScopus26WoS18OpenAlex26İncele - MakaleAçık Erişim2021Scopus SJRQ2Dielectric characteristics and electrical conductivity behavior of graphene/Al2O3/p-type silicon structure
Kaymak, Nuriye; Oz Orhan, Elif; Bayram, Ozkan; Bilge Ocak, Sema
Graphene nanosheets (Gns) obtained by the chemical vapor deposition (CVD) method have been employed for the fabrication of Graphene/Al2O3/p-type silicon (Si) structure. The Raman, scanning-electron-microscopy (SEM) and transmission-electron-microscopy (TEM) have been used to analyze the morphology and structural features of the graphene nanosheet. The dielectric features and electrical-conductivity of Graphene/Al2O3/p-type Si have been studied in the frequency range 10 kHz–400 kHz and in the voltage range, −4 V to +4 V at 300 K. The obtained experimental outcomes imply that electrical conductivity and dielectric features of Graphene/Al2O3/p-type Si were found out to be powerful functions of frequency and applied bias voltage. It can be seen that almost all of the interface states between metal and silicon contribute to modify of dielectric features of Graphene/Al2O3/p-type Si structure.
AtıfScopus6WoS6OpenAlex6İncele - MakaleAçık Erişim2021Scopus SJRQ3Aggressive environment performance of low energy cements containing fly ash
Gokce, H. Suleyman; Simsek, Osman
In this study, compressive strength performance of boron active belite cement containing fly ash at the ratios of 0, 10, 20, and 30% (by weight of cement) is researched against aggressive environments; sea water, 5% sodium sulphate solution, and 5% ammonium nitrate solution in addition to tapping water. Alternative low energy cement i.e., Portland-composite cement was used and its results were compared with those of boron active belite cement. Early strength losses (reaching up to 40%) of the boron active belite cement with incorporation of fly ash up to 30% were found to be less pronounced than those (reaching up to 51%) of Portland-composite cement in tapping water. Although, the losses were highly compensated with the prolonged curing period (90 days), boron active belite cement and Portland-composite cement kept their losses up to 14% and 36%, respectively. Residual mechanical properties (reaching up to 67%) of boron active belite cement against aggressive environments were found almost similar to those of Portland-composite cement in presence of 30% fly ash. In conclusion, the study shows that belite cements with low fly ash contents can be a reasonable alternative for specific applications such as mass concrete, hot weather concreting especially in aggressive environments.
AtıfScopus3WoS1OpenAlex5TR Dizin1
İncele - MakaleAçık Erişim2021Scopus SJRQ1High-pressure homogenisation of sheep milk ice cream mix: Physicochemical and microbiological characterisation
Sert, Durmuş; Mercan, Emin
The effect of high-pressure homogenisation (HPH) treatment (0, 25, 50, 75, or 100 MPa) of mix on the physicochemical, textural, and microbiological characteristics of sheep milk ice cream was determined. Textural properties of the mix were not affected by HPH. However, HPH increased L*, a*, and b* values of the mix. In HPH-treated mix samples, the mean particle diameter was lower compared with the control. The hardness value of ice cream changed from 43.0 to 58.1 N, and HPH increased it depending on the increasing pressure. The highest overrun (58.3%) was determined in control, whereas the lowest overrun (35.8) was found in HPH-100. Melting time and first dripping time were increased depending on the increasing pressure of HPH, while HPH decreased the melting rate. HPH treatment of mix significantly reduced the microbial loads of ice cream samples. Consequently, HPH treatment can enhance the hardness, melting, and microbiological properties of ice cream from sheep milk.
AtıfScopus12WoS12OpenAlex11İncele - MakaleAçık Erişim2020Scopus SJRQ3Gge biplot analysis in wild (Pisum sativum l. subsp. elatius and subsp. sativum) and cultivated pea (pisum sativum l.) genotypes in northern and southern turkey
Girgel, U.; Cokkizgin, A.
This research was carried out in the multiple-environment trials (MET) which one is in Bayburt (40°24'05.7"N 40°08'31.3"E) where the Black Sea geographical region located in the north of Turkey and in the Kahramanmaras (37°35'24.8"N 36°48'49.4"E) where the Mediterranean geographical region located in the south of Turkey in 2016 and 2017 years. In this investigation, 6 registered pea cultivars (Bolero, Jof, Karina, Nihal, Reyna and Utrillo) and 2 wild pea genotypes (Pisum sativum L. subsp. elatius and P. sativum L. subsp. sativum) were used. The variance analysis showed a significant difference among Location (L), genotypes (G), genotypes×locations interaction (GL), genotypes×year interaction (GY), year×location interaction (YL) (all significant at P<0.01 level) and genotype×location×year interaction (GLY) (significant at P<0.05 level) interaction in terms of seed yield. Main effect genotypes (G) is explained 24.42% of total variation. This is followed by 18.78% (L), 17.87% (YL) 7.04% (GL), 4.91% (GY), 2.71% (GLY) and 1.12% (Y), respectively. Graphs were drawn according to the results of GGE biplot analysis and yield data of genotypes were evaluated according to these graphs. In accordance with GGE biplot analysis the seed yield first principal component explained 82.81% of the total variation and second principal component explained 17.19% of the total variation.
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