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Öğe Assessment of the reactions of pure lines selected from Turkish bread wheat landraces against bunt disease (Tilletia foetida) with the GGE-biplot method(Cambridge Univ Press, 2018) Akçura, Mevlüt; Akan, KadirThe present research was conducted to determine the reactions of 200 pure lines selected from bread wheat landraces collected from 18 provinces and seven regions of Turkey against bunt disease (Tilletia foetida) under field conditions for 3 years. Bunt disease reactions of pure lines were assessed based on the infected spike/total spike ratio. For visually assessed materials, the GGE-biplot method, where G = genotype effect and GE = genotype-by-environment effect, was used to group the reactions against bunt disease. Fifty-nine pure lines showed high resistance (with infection rates ranging from 0.1 to 10%); 24 in the moderate resistance (with infection rates ranging from 10.1 to 25%); 75 in the moderate susceptibility (with infection rates ranging from 25.1 to 45%); 38 in the susceptibility (with infection rates ranging from 45.1 to 70%) and finally four in the highly susceptibility (with infection rates of >70.1%). PC1 and PC2 of the GGE-biplot graph created over the years explained 76.49% of the total variation. The GGE-biplot graph provided efficient identification of resistant genotypes. The lowest PC1 values and PC2 values close to 0.0 explained the resistance of pure line to bunt disease best. The resistance of pure lines to bunt disease over the biplot decreased from the first section through the last section. Based on the results of present study, 19 pure lines (located within the first circle of the biplot graph) were selected for resistance breeding programmes against the diseases.Öğe Bazı Ekmeklik Buğday Genotiplerinin Bazı Kalite Özellikleri Yönünden Trakya Bölgesine Adaptasyonunun İncelenmesi(Mevlüt AKÇURA, 2023) Gülhan, Levent; Akçura, Mevlüt; Öztürk, İrfanBu araştırma Trakya Bölgesinde 2 yıl 7 çevrede yetiştirilen 14 adet ekmeklik buğday genotipinde bazı kalite özelliklerinde genotip x çevre interaksiyonlarını değerlendirmek amacıyla yürütülmüştür. Araştırmada kalite özellikleri olarak bin tane ağırlığı, hektolitre ağırlığı, protein oranı, sedimantasyon testi, gluten indeksi ve gluten oranı incelenmiştir. Elde edilen sonuçların yorumlanmasında GGE-biplot analiz yöntemi kullanılmıştır. Bu yöntemde her bir özellik için poligon biplotlar oluşturulmuştur. GGE-biplot analizi bin tane ağırlığı, hektolitre ağırlığı, protein oranı, sedimantasyon testi, gluten indeksi ve gluten oranında toplam varyasyonu sırasıyla, %84,86, %78,24, %71,71, %81,60, %75,82 ve %75,19 oranında açıklamıştır. Deneme çevrelerinin çoğunluğunda bin tane ağırlığında G12, Aldane ve G17, hektolitre ağırlığında G4 ve Gelibolu, protein oranında, Aldane, G17, Saban ve G12, sedimantasyon testinde Aldane, G9, G20, G12 ve G14, gluten indeksinde Gelibolu, G14 ve G8, gluten oranında ise G9, Saban ve G21 iyi uyum sağlayan genotipler olmuştur. İncelenen kalite özelliklerinin tamamı üzerinden değerlendirme yapıldığında hatlar arasında G9 ve G12 diğer genotiplerden daha üstün değerlere sahip olmuşturÖğe Bazı Nohut Çeşitlerinin Verim ve Verim Unsurlarının İncelenmesi(Çanakkale Onsekiz Mart Üniversitesi, 2022) Topçu, Melis; Akçura, MevlütBu çalışma, 2017-2018 yetiştirme sezonunda Edirne ili Uzunköprü ilçesi koşullarında yürütülmüştür. Çalışmada 34 adet tescilli, 2 adet yerel nohut çeşidi kullanılmıştır. Deneme tesadüf blokları deneme desenine göre 3 tekerrürlü olarak kurulmuştur. Çalışmada yöreye uygun ümitvar nohut çeşitlerin belirlenmesi amaçlanmıştır. En yüksek tane verimi 326.97 kg/da ile Eser-87 çeşidinden, en düşük tane verimi 97.50 kg/da ile Küsmen-99 çeşidinden elde edilmiştir. Çiçeklenme gün sayısı 48.33 ile 62.07 gün arasında, ana dal sayısı 0.43 ile 9.17 (adet/bitki) arasında, yan dal sayısı 4.83 ile 49.23 (adet/bitki) arasında, ilk bakla yüksekliği 11.50 ile 30.90 cm arasında, bakla sayısı 25.03 ile 261.50 (adet/bitki) arasında, bitkide tane sayısı 33.63 ile 281.33 (adet) arasında, bitki boyu 38.50 ile 66.37 cm arasında, bitki genişliği 25.10 cm ile 83.83 cm arasında değişmiştir. Çalışma sonucunda elde edilen verilere göre Trakya bölgesi için Eser-87, Aziziye-94 ve İnci nohut çeşitlerinin ümitvar olduğu sonucuna ulaşılmıştır.Öğe Bazı Yulaf Genotiplerinin Çanakkale Koşullarında Verim ve Verim Unsurlarının İncelenmesi(2017) Sabandüzen, Burcu; Akçura, MevlütBu araştırma, tane verimi ve verim unsurları yönünden Çanakkale koşullarına uygun yulaf çeşit vehatlarını belirlemek amacıyla 2014-2015 ve 2015-2016 yetiştirme sezonlarında 49 yulaf genotipi ileyürütülmüştür. Denemeler her iki sezonda latis deneme desenine göre kurulmuştur. Araştırmada, bitki boyu(cm), salkımda tane sayısı (adet), salkımda tane ağırlığı (g), hasat indeksi (%), biyolojik verim (kg da-1), taneverimi (kg da-1), bin tane ağırlığı (g) ve ham protein oranı (%) incelenmiştir. İki yıllık ortalamaya göre yulafgenotiplerinin tane verimleri 335 kg da-1ile 860 kg da-1 arasında değişim göstermiştir. En yüksek tane verimi 40,36 ve 24 nolu hatlardan sırasıyla 860 kg da-1, 805 kg da-1ve 789 kg da-1 elde edilmiştir. Genotiplerin iki yıllıkbiyolojik verim değişim aralığı ise 1038 kg da-1ile 3156 kg da-1 olmuştur. En yüksek biyolojik verim 8, 36 ve 24nolu genotiplerden sırasıyla 3156, 2580 ve 2293 kg da-1 elde edilmiştir. Araştırma sonuçlarına göre çeşitlerarasında en yüksek tane verimine sahip olan Fetih çeşidi ile 40 nolu hat Çanakkale ilinde yetiştirilebilir.Öğe Bingöl İlinden Toplanan Yerel Çavdarlarda Tane Verimi ve Bazı Özellikler Arasındaki İlişkilerin Biplot Analizi İle İncelenmesi(2017) Kabak, Derya; Akçura, MevlütBu araştırma Bingöl ilinden toplanan 80 adet yerel çavdar popülasyonu ve Aslım-95 çavdar çeşidindetane verimi (TV) ile 10 adet kantitatif [bayrak yaprak eni (BYE), bayrak yaprak boyu (BYB), sap kalınlığı (SK),başak uzunluğu (BAU), başakta başakçık sayısı (BSC), başakta tane sayısı (BTS), başakta tane ağırlığı (BTA), bitkiboyu (BB), bin tane ağırlığı (BINTA) ve ham protein oranı (HPO)] özellik arasındaki ilişkileri değerlendirmekamacıyla yürütülmüştür. Araştırma dengeli latis deneme desenine göre 2014-2015 ve 2015-2016 yetiştirmesezonlarında Çanakkale koşullarında yürütülmüştür. Özellikler arası ilişkileri görsel olarak yorumlamak amacıylaiki yıllık ortalamalar Genotip x Özellik (GÖ) biplot analiz yöntemi ile analiz edilmiştir. GÖ-biplot eksenleridenemedeki toplam varyasyonun %63.4’ ünü açıklamıştır. İki yıllık ortalamaya göre popülasyonların taneverimleri 93 kg da-1 ile 341 kg da-1 arasında, ham protein oranları %9.52 ile %13.25 arasında, başakta tane sayısı26.64 adet ile 66.14 adet arasında, başakta tane ağırlığı 0.60 g ile 1.64 g arasında, bitki boyu 120.91 cm ile146.47 cm arasında değişim göstermiştir. Üç farklı bakış açısına göre oluşturulan GÖ- biplot sonuçlarına göre 2nolu popülasyon BYE, BAU ve BSC sayısı yönünden, 17 nolu popülasyon BB ve BSC yönünden, 26 nolupopülasyon BTS, BTA ve TV yönünden en yüksek değerlere sahip olarak diğer popülasyonlardan üstün olmuştur.BYE ve BYB en uzun vektör uzunlukları ile popülasyon performanslarının en iyi şekilde değerlendirilmesinisağlayan özellikler olmuştur.Öğe Breeding Winter Oat (Avena sativa L.) Varieties with High Quality(2021) Kaya, Yüksel; Akçura, MevlütThe objective of national oat breeding program is to develop the oat varieties with high yielding,resistant to diseases, drought, cold, and heat stresses and suitable for different usages (food, feed, and forage).To achieve that goal, a total of 284 (232 lines + 52 checks) oat genotypes were tested under rain-fed conditionsat the yield, advanced yield, and elite yield trials conducted between 2008 and 2012. During the consecutiveoat breeding cycles, genotypes with high yielding and acceptable quality were promoted. Among the qualitytraits, protein content (PC), oil content (OC), and test weight (TW) were preferred as selection criteria. Heritability (H) and correlation coefficients were estimated for the GY and quality characteristics of thegenotypes tested. While the H for GY was low (0.38), Hs for quality traits (PC, OC, and TW) were medium (0.66,0.68, and 0.57, respectively). As for the correlations between the traits of interest, the statistically significantpositive relationships were observed between GY and OC, GY and TW, and OC and TW. In contrast, statisticallysignificant negative associations were measured between GY and PC, PC and OC, and PC and TW. Negativerelationships and low-medium H values calculated for the traits studied appear to be the most critical obstaclesfor national oat breeding program. To tackle these obstacles, the parents, i.e., gene pool, used in the oatcrossing block should be characterized as soon as possible and enriched with introducing new exoticgermplasm. We believe that by doing so, we can develop high yielding and high-quality oat varieties.Öğe Determination of Grain Quality Parameters of Selected Bread Wheat Varieties and Pure Lines Derived from Landraces of Türkiye(2022) Hocaoğlu, Onur; Akçura, Mevlüt; Aydoğan, Seydi; Akçacık, Aysun GöçmenBread wheat landraces are considered among important gene sources for quality breeding programs. This study aims to compare thousand kernel weight crude protein ratio, dry gluten ratio, grain hardness and zeleny sedimentation results of 20 bread wheat lines selected from landraces to 5 registered cultivars in order to determine future candidates for quality breeding programs. Field experiments were conducted in the consequent 2012-2013 and 2013-2014 growing seasons in Çanakkale (Türkiye), according to randomized complete block design with three replications. ANOVA results indicated significant difference among genotypes, means were compared with Duncan’s test. Additionally, genotype × growing season interaction were significant for all parameters. Results of cluster and PCA Biplot analysis revealed a significant and positive relationship between crude protein ratio and dry gluten ratio while allowing for the selection of superior landrace pure lines. Our findings suggested that bread wheat varieties had higher TKW compared to landrace pure lines when pure lines had higher crude protein ratio, dry gluten ratio, sedimentation value with generally softer grains. Bread wheat landraces were concluded as being important variation sources.Öğe Determination of Yield and Yield Components of Selected Bread Wheat Varieties and Landrace Derived Pure Lines Collected from Various Provinces of Türkiye(2022) Akçura, Mevlüt; Hocaoğlu, OnurTurkey’s flora contains a substantial genetic diversity of natural wheat landrace germplasm. This study aims to compare 20 bread wheat pure lines selected from landraces and 5 varieties by their yield and yield components to select promising genotypes. Field experiments are conducted in 2012-2013 and 2013-2014 growing seasons in Çanakkale (Türkiye), according to a randomized complete block experimental design with three replications. Plant height, spike length, the number of spikelets per spike, spike weight, grain weight per spike, the number of grains per spike, the number of spikes per square meter, the number of grains per square meter, biomass, harvest index and grain yield of all bread wheat genotypes were determined. ANOVA results indicated that differences between all genotypes were significant. Commercial varieties were found to have higher grain yield, harvest index, spike weight, grain weight per spike, number of grains per spike, and number of grains per square meter compared to the landrace-derived pure lines, when pure lines were found to have higher plant height, biomass, and number of spikelets per spike. Results suggested that bread wheat landraces tended to be superior to the varieties by vegetative traits but inferior by grain properties, which could be the result of breeding efforts aimed to improve the grain yield of wheat. In conclusion, pure lines with high grain yield, Hakkari TR 47982/5 and Kırklareli TR 38316/2 were suggested as candidates to be utilized in future breeding programs.Öğe Determining the Growth of Naked Oat Genotypes by Using Nonlinear Regression Models and Zadoks Growth Scale(Mevlüt AKÇURA, 2022) Hocaoğlu, Onur; Akçura, Mevlüt; Çeri, SaitIncreasing popularity of the naked oat (Avena nuda L.) in the food industry promoted the value of its cultivation. Despite the growing demand for the naked oat grain, the research about its agronomy is currently limited. Aim of this study were to evaluate the growth characteristics of naked oat with nonlinear regression models. Field trials were conducted according to the split block design with three replications. Our growth data consisted of weekly dry weight observations covering the entire growth span of four naked oat genotypes (211 samplings in total) for two growing seasons. Curve fitting successfully revealed the genotypic and environmental variations when sampling weeks and Zadoks growth stages were used as time measures in two separate analyses. According to results, last week of tillering stage were found to be critical for naked oat when the rate of growth reached its peak around booting stage. Implementing Zadoks growth stage as time measure in growth analysis had several drawbacks but revealed unique interpretations about the crop development and environmental variation. Logistic, Logistic Power and Ratkowsky models were the best fitting models to assess weekly dry weight increases with the coefficient of determinations ranging from 0.99177 to 0.94206Öğe Determining the Selection Criteria for Grain Yield of Cluster Bean in Mediterranean Conditions(2021) Kara, Rukiye; Akçura, MevlütDue to its versatile usage area, cluster bean is one of the crops on which many adaptation studies have been carried out in different countries in recent years. This research was conducted to determine selection criteria to increase the grain yield in the different locations of the Mediterranean climate in Turkey. The research was established in four different locations with nine cluster bean genotypes with three replications in a 9x10 rectangular lattice experimental design. Seventeen quantitative traits were examined. Correlation, factor, biplot, regression, and path analysis were used to create selection criteria to select genotypes with high grain yields in cluster beans. According to correlation analysis, there were positive and significant correlations between grain yield and number of pods per plant (NPP), the number of seeds per plant (NSP), grain yield per plant (GYP), number of clusters per plant (NCP), the 45th -day of plant height (45PH), 90th -day of plant height (90PH). Significant negative correlations were found between grain yield and pod width (WP), pod length (LP), and the number of grains per pod (NGP). According to the results of both factor and biplot analysis, seventeen traits were reduced to four factors, and factors explained 78.25% of the total variation. The most important factor group was composed of NPP, GY, NSP, NCP, and GYP with an explanation rate of 38.81%. Path analysis explained 76% of the grain yield. This method showed that the plant grain yield (P = 0.81) and the number of clusters in the plant (P = 0.25) had the highest direct effect on grain yield. Regression analysis results were also like path analysis. In the regression analysis were grain yield was the dependent variable, the plant grain yield (10.811) and the number of clusters in the plant (3.11) had the highest B value. The total disclosure rate of these two traits in Collinearity statistics was 93%. The results of all methods indicated that in the breeding programs to be established to increase the grain yield of cluster bean in the Mediterranean climate, selection on the seed yield of the plant and the number of pods in the cluster directly, according to the number of clusters in the plant indirectly will enable the breeders to reach their goals.Öğe Effects of Drip Irrigations with Different Irrigation Intervals and Levels on Nutritional Traits of Paddy Cultivars(MDPI, 2025) Çiftci, Beyza; Kardeş, Yusuf Murat; Varol, İhsan Serkan; Taş, İsmail; Akçura, Sevim; Coşkun, Yalçın; Karaman, Kevser; Akçura, MevlütRice serves as the primary food source for the majority of the world's population. In terms of irrigation water, the highest volume of irrigation water is utilized in paddy irrigation. Excessive water use causes both waste of limited water resources and various environmental problems. The drip irrigation method with high water use efficiency will reduce both the need for irrigation water and the environmental footprint of paddy production. This study was conducted to investigate the effects of two different irrigation intervals (2 and 4 days) and four irrigation levels (150%, 125%, 100%, and 75% of evaporation from a Class-A pan) on the nutritional traits of three different paddy cultivars (Ronaldo, Baldo, and Osmanc & imath;k). Increasing irrigation intervals and decreasing irrigation levels reduced the nutritional properties (protein, oil, starch) of the rice grains. In addition, increasing irrigation levels also increased the phytic acid and dietary fiber contents. The highest protein (7.14%) and total starch (87.10%) contents were obtained from the 150% irrigation treatments. The highest amylose content (20.74%) was obtained from the 75% irrigation treatment. In general, it was found that irrigation levels should be applied at 125% and 150% to increase the mineral content of rice grains. Although water deficits decreased the nutritional properties of the paddy cultivars, drip irrigation at an appropriate level did not have any negative effects on nutritional traits.Öğe Evaluating Mineral Contents of Selected Bread Wheat Landrace Pure Lines Derived from West Anatolia and Marmara Regions and Cultivars by GGE Biplot(2017) Hocaoğlu, Onur; Akçura, MevlütBread wheat landraces are important resources for micronutritent improvement in plant breeding programs. Thisresearch aims to evaluate 9 macro and micronutrient contents (Fe, Zn, B, K, Mn, Cu, Mg, Ca, Mo) of 37 bread wheatpure lines derived from landraces of West Anatolia (Eskişehir and Kütahya) and Thrace (Edirne and Kırklareli) regionsand compare with 11 bread wheat cultivars by using GGE Biplot. Field trials are conducted by incomplete block designwith two replications in 2011-2012 growing season in Dardanos Agricultural Facility of Çanakkale Onsekiz MartUniversity. According to the biplot graphics, iron and zinc contents of genotypes were involved into the same sectionwhen boron and molibden contents were also highly correlated. Pure line L4 (TR57999/5) were the most prominentgenotype for iron and zinc contents when L36 (TR38316/2) were superior by both boron and molibden contents.Copper contents of grains were found negatively correlated with iron and zinc contents. Results indicate notablevariability among pure lines and lesser variability for cultivars for all micronutrients. Wheat cultivars had relativelyhigher Mo content while could be improved by their Fe, Zn, B, K and Ca contents. Possible candidates are introducedto be used in a future study.Öğe Evaluating the Element Contents of Durum Wheat LandracesPure Lines in Çanakkale Conditions(2020) Hocaoğlu, Fatih Onur; Akçura, Mevlüt; Kaplan, MahmutWheat landraces are often utilized in breeding programsfor their potential to improve the grain qualityof new varieties. Our goal is to evaluate thousand kernel weights (TKW), percentages of the yellowberry kernels (PYK), B, Ca, Cu, Fe, K, Mg, Mn, Na, Ni, P, S and Zn contents of 25 landracesderived durum wheat pure lines collected from the fauna of Turkeyto identify promising candidates.Field trials were conducted in Çanakkale in 2015-2016 and 2016-2017 growing seasons and element contents of pure lineswere determined by using ICP-OES. Differences between durumwheatlandraces werefound statistically significant by all traits (p<0.01). Correlation analysis demonstrated that Ca, Cu and Mg contents of pure lines were positively correlated to each other. Results suggestedavaluable variability amongdurum wheat genotypes in terms of their element contents. Promising candidates were selected for future breeding programs.Öğe Evaluation of silage quality characteristics and nutritive value of oat genotypes(Springer, 2024) Kaplan, Mahmut; Akçura, Mevlüt; Kardeş, Yusuf Murat; Büyükılıç Beyzi, Selma; Çiftci, Beyza; Kökten, KağanThis study aimed to determine the silage characteristics of oat lines developed through a rigorous 10-year selection process. During this period, 100 plants with high biomass yield were meticulously chosen from oat lines obtained from the Louisiana State University gene bank. Researchers designed experiments using an incomplete randomized block format across two growing seasons: 2014-2015 and 2015-2016. Oat plants were carefully harvested at the milk stage, chopped into pieces using a specialized plant chopper, and ensiled in plastic vacuum bags for subsequent analysis. The samples were then stored at room temperature for a period of 60 days. The comprehensive analysis conducted over this two-year research period revealed significant variations in the silage yields of the genotypes, ranging from 5.71 to 24.42 t ha-1. Moreover, notable variations were observed in the content of crude ash (ranging from 3.952 to 9.380%), ADF (ranging from 27.899 to 40.782%), NDF (ranging from 40.688 to 63.999%), crude protein (ranging from 6.673 to 11.470%), dry matter (ranging from 14.954 to 41.817%), pH levels (ranging from 3.812 to 5.668), in vitro gas production (ranging from 49.793 to 67.847 ml), methane production (ranging from 15.036 to 18.442 ml), as well as concentrations of acetic acid (ranging from 0.000 to 0.144%), lactic acid (ranging from 1.974 to 2.599%), butyric acid (ranging from 0.000 to 0.064%), and propionic acid (ranging from 0.000 to 0.306%). The study clearly indicated that many oat lines showed promising silage properties. Consequently, it is inferred that the utilization of high-yield lines in silage production holds considerable potential in providing a valuable feed source for livestock.Öğe Farklı Sulama Suyu Tuzluluk Düzeylerinin Mısırın Fide Gelişimine Etkileri(2020) Coşkun, Yalçın; Taş, İsmail; Akçura, Mevlüt; Oral, Ayhan; Tütenocakl, Tülay; Yeter, TuğbaSulama suyunun SAR değeri suyun kalite sınıfının belirlenmesinde birincil parametredir. Bu nedenle SARdeğeri dikkate alınmadan sodyum tuzu ile yapılan çalışmalarda elde edilen sonuçlar tuz zararı olmayıp sodyumzararını temsil etmektedir. Mısır bitkisinin sulama suyu tuzluluğunu hangi seviyeye kadar tolere edilebileceğinitespit etmek amacıyla SAR değeri 1’in altında ayarlanarak farklı tuz konsantrasyonuna sahip sulama suları ileçimlendirme ve saksı denemeleri yapılmıştır. Çimlendirme denemesi sonucunda sulama suyu tuzlulukseviyesindeki artışa paralel olarak kök uzunluğu, fide kuru ağırlığı ve çimlenme oranı azalmıştır. Kök uzunluğusulama suyu tuzluluğunun 3 dS m-1 ECi seviyesinde olumsuz etkilenmeye başlarken fide kuru ağırlığı veçimlenme oranı 5 dS m-1 ECi seviyesinde etkilenmeye başlamıştır. Saksı denemesinde sulama suyu tuzlulukseviyesindeki artışa paralel olarak bitki boyu ve bitki kuru ağırlığı değerleri azalmış olup 8 dS m-1 ECi seviyesindeolumsuz etkilenmiştir.Öğe Fermentation Quality and Nutritional Traits of Cluster Bean-Maize Mixture Silages(2021) Kaplan, Mahmut; Akçura, MevlütIn present study, effects of different mixture ratios of cluster bean (CB) and maize (M) on silagefermentation and nutritional traits were investigated. Based on dry matter (DM) ratios, maize and cluster beanplants were mixed in five different ratios (100% M, 75% M+25% CB, 50% M+50% CB, 25% M+75% CB and 100%CB). Pure maize, cluster bean and mixture were ensiled for 60 days. Effects of mixture ratios on investigatedtraits were found to be highly significant (p?0.01). Increasing silage DM, ADF (acid detergent fiber), NDF(neutral detergent fiber), lactic acid, gas-methane production, metabolizable energy (ME) and organic matterdigestibility (OMD) values and decreasing pH levels were observed with increasing maize ratio of the mixtures.Increasing silage crude oil (CO), crude ash (CA) and crude protein (CP) content and volatile fatty acids (acetic,butyric and propionic) were observed with increasing cluster bean ratio of the mixtures. Present findingsrevealed that improvements were achieved in DM, pH, nutritional traits and ME of the silages with mixtures ofmaize and cluster bean. It was concluded that 25, 50 and 75% maize ratios in mixtures provided significantcontributions to silage quality.Öğe Groat element concentration at different spikelets of oat panicles (Avena sativa L.) evaluated at three Turkish locations(2012) Kara, Rukiye; Dokuyucu, Tevrican; Demirkıran, Ali Rıza; Dumlupınar, Ziya; Akçura, Mevlüt; Akkaya, AydınThis research was carried out to determine the variation in spikelet groups, genotypes and environments for macronutrient (Ca, Mg and K) and micronutrient (Na, Cu, Fe, Mn and Zn) concentrations of oat (Avena sativa L.) groat. The panicles of 16 Turkish oat (Avena sativa L.) genotypes were obtained from three locations; Kahramanmaras, Konya and Cumra in Turkey in 2002-2003 cropping year. The panicles of each variety were divided into three spikelet groups as basal spikelet (BS), central spikelet (CS) and apical spikelet (AS). The oat groats belonging to spikelet groups were pooled to determine macronutrient and micronutrient concentrations. The results indicate that grain number (GNP) and grain weight per panicle (GWP) were significant for locations (L), genotypes (G) and spikelet groups (SG). Genotypes were significantly different for Ca, Mg and K concentrations. Locations had significant effect on Ca and Mg concentrations while there were not any significantly differences for spikelet groups. Locations had significantly effect on micronutrient concentrations (Na, Cu, Mn and Zn) except Fe concentration of oat groats. Genotypes were significantly different for all micronutrient concentrations, while spikelet groups were significant for only Zn concentrations. Location x genotype (L x G) interaction was significant for all micronutrient concentrations, while L x G interaction was significant for Ca and Mg concentrations in macronutrients.Öğe İklim Değişiminin Farklı Büyüme Tabiatına Sahip Bazı Arpa Çeşitleri Üzerine Etkisi(2022) Kaya, Yüksel; Akçura, MevlütBu çalışmada farklı büyüme tabiatına (yazlık, fakültatif ve kışlık) sahip 2 ve 6 sıralı başak tipinde 15 arpa çeşidi, 2017-2018 ve 2019-2020 yetiştirme sezonlarında, yağışa bağımlı şartlarda, yazlık arpa kuşağında denemeye alınmış ve 8 bitkisel karakter (tane verimi, hasat indeksi, başakta tane sayısı, metrekarede başak sayısı, bitki boyu, başaklanma süresi, bin tane ve hektolitre ağırlığı) açısından incelenmiştir. 2 sıralı arpa çeşitlerinden bazıları hem yüksek tane iriliği (bin tane ağırlığı) ve hem de tane verimi yönüyle dikkati çekmiştir. Tane iriliği küçük olmasına rağmen, bazı 6 sıralı arpa çeşitlerinin tane verimi değerleri, 2 sıralı çeşitlerle rekabet edebilir seviyeye ulaşmıştır. Diğer taraftan kışlık ve fakültatif arpa çeşitlerinin tane verimi ve diğer bitkisel özelliklerine ait değerler, yazlık arpa çeşitlerinin gerisinde kalmıştır. Bu durumun temeli nedeni kışlık ve fakültatif arpa çeşitlerinin başaklanma sürelerinin yazlık arpa kuşağına uyumsuzluğuyla açıklanmıştır. Kışlık ve fakültatif arpa çeşitlerinin uzun fenolojik döngüye sahip olmaları, özellikle başaklanma ve tane dolum dönemlerinin kurak döneme (yağış eksikliğinden dolayı) denk gelmesine neden olmuş, bu da tane verimi başta olmak üzere diğer bitkisel karakterlerini olumsuz etkilemiştir. Denemeden elde edilen bulgular, Türkiye’de en fazla arpa üretiminin yapıldığı kışlık arpa kuşağının iklim değişiminden olumsuz etkilenebileceğini göstermektedir. İklim değişiminin olumsuz etkilerini azaltabilmek için kışlık arpa kuşağında erkenci (fenolojik döngüsü daha kısa) fakültatif arpa çeşitleri tercih edilebilir.Öğe Kavuzsuz yulaf genotipleri ile bazı yulaf çeşitlerinin Marmara bölgesindeki tane verimleri ve bazı tarımsal özelliklerinin değerlendirilmesi(Mevlüt AKÇURA, 2022) Hocaoğlu, Onur; Akçura, Mevlüt; Çeri, SaitKavuzsuz yulaf, besleyici tanesi ve gıda sanayiindeki geniş kullanım imkanlarıyla dikkat çeken ülkemiz için yeni bir tahıldır. Bu çalışmada 3 kavuzsuz yulaf genotipi ile Kahraman, Diriliş, Küçükyayla, Otağı, Sebat ve Yeniçeri yulaf çeşitlerinin tane verimi (TV), bin tane ağırlığı (BTA), hektolitre ağırlığı (HL) ve biyolojik verim (BV) yönlerinden karşılaştırılması amaçlanmaktadır. Çanakkale’de 2019-2020 ve 2020-2021 sezonlarında tesadüf blokları deneme desenine göre iki tekrarlamalı olarak kurulan tarla denemelerinden elde edilen sonuçlar varyans analizi, Tukey testi ve GÖ (Genotip Özellik) Biplot yöntemleri kullanılarak değerlendirilmiştir. Araştırma sonuçlarına göre tescilli yulaf çeşitlerinden Diriliş TV, Kahraman HL, Otağı ise BV değerleri ile öne çıkmışlardır. Kavuzsuz yulaf genotiplerinde yüksek TV ve BTA belirlenmiş, ülkemizde kavuzsuz yulafın üretim potansiyelinin yüksek olduğu sonucuna ulaşılmıştır.Öğe Modelling the Effect of Irrigation Deficit on Maize Growth with Logistic Regression(Taylor & Francis Inc, 2023) Hocaoğlu, Onur; Gonülal, Erdal; Akçura, MevlütThis research is conducted to model the limiting effects of irrigation deficit on maize growth which is a major challenge in dry areas. Field trials were conducted in completely randomized block design with three replications in Konya region (Turkey) during 2020 and 2021 growing seasons between May and August. Dry matter (DM) increase of maize was assessed on weekly intervals under four irrigation treatments, configured as %100, 75, 50 and 25 of the field capacity. Curve fitting with Logistic regression model demonstrated gradual decreases of maximum DM (from 496.331 to 254.119 g) and maximum growth rate (49,95 to 29,47 g/weeks) in average due to irrigation deficit when accurately modeling the DM accumulation with the varying R2 values between 0.979 and 0.995. Results of logistic regression curves and IWUE suggested that even 25% restriction of irrigation water caused an average of %25.5 decrease on DM when 50% and more restriction could be associated with water stress. Additionally, irrigation water use efficiency (IWUE) was increased after the maximum acceleration point (MAP) which coincided with tasseling stage and inflection point (IP) where growth rate reaches to maximum, indicating that these periods were critical for maize in terms of preventing water deficiency.
