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Öğe Adaptability of newly improved creeping bentgrass (Agrostis stolonifera L.) genotypes in a mediterranean environment(Society of Field Crops Science, 2014) Kavut Y.T.; Avcioglu R.; Demiroglu G.; Geren H.; Kir B.Creeping bentgrass (Agrostis stolonifera L.), with a mild shade tolerance, is a stoloniferous cool season turf grass adaptable to temperate climatic conditions. Recently new genotypes were improved by breeders in the USA, having respectively higher heat and drought tolerance. In an attempt to evaluate the adaptability of this type of bentgrass genotypes, an experiment were established on the experimental farm located at Bornova, Ege Univ. Agric. Faculty, Izmir, Turkey during the years of 2007 and 2009. Six genotypes of bentgrass and traditional cultivar “Kromi” as control were tested for two years and turf grass color, cover, weed infestation and turf quality were assessed by a visual scoring (1-9 points). Results indicated significant variations among the genotypes in terms of the evaluated characteristics and the average adaptability of some genotypes of which some traits such as cover and turf quality were in an acceptable range. It was also suggested that distinguished genotypes such as genotype M65-6-OVN-28, M71-6-26-294 and M39-6-20 should be tested furthermore and for other agronomical characteristics. © 2014, Society of Field Crops Science. All Rights Reserved.Öğe Ammi-biplot analysis of yield performances of bread wheat cultivars grown at different locations(2011) Ilker E.; Geren H.; Ünsal R.; Sevdm I.; Aykut Tonk F.; Tosun M.The purpose of the study was to determine the stability and yield performances of 20 bread wheat cultivars grown in nine different environments. The trials were arranged in a Randomized Complete Block Design with four replications. Additive main effects and multiplicative interactions analysis (AMMI-biplot) indicated that the yield performances of bread wheat cultivars were highly affected by the major environmental factors. The first two principal component axes (PCA 1 and PCA 2) were significant and they explained 60.9% of the total genotype x environment interaction. A biplot generated using genotypic and environmental scores of the first two AMMI components demonstrated that cultivars with larger PCA 1 and lower PCA 2 scores were high yielding and stable cultivars and cultivars with lower PCA 1 and larger PCA 2 scores were low yielding and unstable cultivars in tested locations. It could be concluded that the Basribey 95 had the highest yield performance and also the stable genotype in the test locations. D{stroke}zmir 85 and Ziyabey 98 were poorly stable although they showed high yield performances in some of test environments. Momtchill had the lowest yield performance in all test locations. It was detected that Menemen location could be the most representative among the tested locations to determine the stability of bread wheat cultivars to recommend the farmers in the Western Coastal Zones in the Aegean Region under Mediterranean climatical conditions of Turkey.Öğe Dry matter yield and silage quality of some winter Cereals harvested at different stages under mediterranean climate conditions(Society of Field Crops Science, 2014) Geren H.Winter cereals can provide feed earlier than annual grasses since they are generally more adaptable to early sowing due to their higher tolerance of dry conditions. Cereals are also better suited to single-cut silage-making, whereas annual grasses require multiple cuts or grazings to be fully utilised. A field and laboratory experiments were conducted to evaluate the effect of different harvest stages on the dry matter yield and silage quality of some winter cereals, during 2009-2011 growing season. Effects of three different harvest stages (early heading, milky stage, mid-dough stage) on five cereals (Hordeum vulgare, Triticum aestivum, Secale cereale, Triticosecale, Avena sativa) were tested. The experiment was arranged in split block with four replications. Results indicated that, it was possible to produce an average of 10.9 t ha-1 dry matter yield and an average of 9.2% crude protein content at mid-dough stage in regions with Mediterranean-type climates. It was also concluded that Avena sativa should be preferred for high biomass yield and should be cut at the beginning of mid-dough maturity stages for higher quality silage. © 2014, Society of Field Crops Science. All Rights Reserved.Öğe Effect of different plant densities on the fruit yield and some related parameters and storage losses of fodder watermelon (Citrillus lanatus var. citroides) fruits(Society of Field Crops Science, 2014) Kavut Y.T.; Geren H.; Simic A.This study was conducted in order to determine the effect of different plant densities (4762, 7143, 9524, 14286, 28571 plants ha-1) on the fruit yield and some other yield components of fodder watermelon under typical Mediterranean climate conditions during summer period of 2012 and 2013. Results indicated that average number of fruit per plant increased by decreasing plant densities but not single fruit weight and soluble solid content. It was suggested that 9524 plants ha-1 (210x50cm) of fodder watermelon was the most successful crop density regarding the total fruit yield (189 t ha-1). It was also concluded that fodder watermelon fruits can be easily stored 210 days with 24% weight loss without any rot. © 2014, Society of Field Crops Science. All Rights Reserved.Öğe Effect of different plant densities on the yield and some silage quality characteristics of giant king grass (Pennisetum hybridum) under mediterranean climatic conditions(Society of Field Crops Science, 2015) Geren H.; Kavut Y.T.The aims of this study were to determine the adaptability of giant king grass (Pennisetum hybridum) under Mediterranean climate conditions, and also to determine whether proper plant densities could improve growth and yield. Study site was located at Bornova, Turkey (38°27.236 N, 27°13.576 E and 20 m). Treatment consisted of four densities of plant population (D1:57,143; D2:28,571; D3:19,048 and D4:14,286 plant ha-1) with three replicates per treatment in a randomized block design. Setts were planted in mid June of 2010 and allowed to grow for 4 full growing seasons. Average result of four years indicated that there were significant effects of plant densities on the dry matter yield and other yield characteristics of giant king grass but not on silage pH. It was recommended that the production of giant king grass using D2 (70x50 cm) was the most successful planting density regarding the dry matter (32.6 t ha-1) and crude protein yield to the regions with Mediterranean-type climates under irrigation. © 2015, Society of Field Crops Science. All rights reserved.Öğe Effects of different nitrogen levels on the grain yield and some yield components of quinoa (Chenopodium quinoa willd.) under mediterranean climatic conditions(Society of Field Crops Science, 2015) Geren H.Quinoa (Chenopodium quinoa Willd.), is a pseudo-cereal crop that has been cultivated in the Andean region in South America. The quinoa as a field crop has a great potential in the improvement of food for humans and animals even under the conditions of marginal lands. For getting high crop yields, nutrients in balanced amount are a basic requirement. Experiments were carried out at the Bornova experimental fields of Field Crops Dept. of Agriculture Fac., Ege Univ., Turkey during 2013 and 2014 main crop growing season in order to evaluate the effect of seven nitrogen levels (0, 50, 75, 100, 125, 150 and 175 kg ha-1) on the grain yield and some yield components of cultivar Q-52 of quinoa. Results indicated that the effects of nitrogen treatments and years on all characteristics tested were significant. Nitrogen level of 150 kg ha-1 was proved to be the best level for nitrogen supplementation of soil for grain yield (2. 95 t ha-1) and crude protein content (16%) of quinoa under Mediterranean ecological conditions of Bornova. © 2015, Society of Field Crops Science. All rights reserved.Öğe Evaluation of heritability and correlation for seed yield and yield components in faba bean (Vicia faba L.)(Asian Network for Scientific Information, 2007) Alan O.; Geren H.In this study, heritability and correlation were determined for seed yield and its components by using five faba bean (Vicia faba L.) cultivars (Eresen-87, Filiz-99, Sevilla, Kemalpaşa and Tarzan). Correlation analysis between seed yield and yield characteristics indicated that seed yield had significant positive relationship with seeds per pod. Also, significant correlations were found between yield components; pods per plant with plant height and seeds per pod with number of stems. Heritability values of various traits were: 29% for plant height, 17.6% for number of stems, 3% for pods per plant, 47% for seeds per pod, 77% for seed yield, 30% for 1000-seed weight and 33% for hectolitre weight. These results showed that environmental conditions have a greater effect on pods per plant and number of stems than on other characteristics. It is hoped that these findings would be useful for future breeding programmes involving this important crop. © 2007 Asian Network for Scientific Information.Öğe Forage yield and lodging traits in peas (Pisum sativum L.) with different leaf types(2010) Bilgili U.; Uzun A.; Sincik M.; Yavuz M.; Aydinoglu B.; Çakmakci S.; Geren H.; Avcioglu R.; Nizam I.; Tekeli A.S.; Gül I.; Anlarsal E.; Yücel C.; Avci M.; Acar Z.; Ayan I.; Üstün A.; Açikgöz E.Two semi-leafless and four leafed pea (Pisum sativum L.) genotypes were evaluated for plant height, lodging scores, and forage yield in eight diverse locations with typical Mediterranean or Mediterranean-type climate in the 2001-2002 and 2002-2003 growing seasons. The genotypes used in this study were forage type with indeterminate growing habit. Significant differences among pea genotypes were found for all traits over years and locations. All interactions which related to G × E interaction showed significance (P>0.01) for all traits. The forage yield of the pea genotypes averaged 26605 kg ha-1 and the highest yield was obtained from the leafed genotype Urunlu. Its forage yield reached to 35970 kg ha-1 yield level at Samsun location.Öğe Genotype × environment interaction and stability analysis for dry matter and seed yield in field pea (Pisum sativum L.) [Interacción genotipo × ambiente y análisis de estabilidad para rendimiento de materia seca y de semilla en guisante (Pisum sativum L.)](Ministerio de Agricultura Pesca y Alimentacion, 2009) Acikgoz E.; Ustun A.; Gul I.; Anlarsal E.; Tekeli A.S.; Nizam I.; Avcioglu R.; Geren H.; Cakmakci S.; Aydinoglu B.; Yucel C.; Avci M.; Acar Z.; Ayan I.; Uzun A.; Bilgili U.; Sincik M.; Yavuz M.The objectives of this study were to evaluate dry matter (DM) yield and seed yield of six leafed and semi-leafless pea (Pisum sativum L.) genotypes, and to compare them for these traits. Evaluation of genotype × environment (G × E) interaction, stability and cluster analysis were also carried out at eight diverse locations with typical Mediterranean and Mediterranean-type climate during the 2001-2002 and 2002-2003 growing seasons. Significant differences were found among the pea genotypes for DM and seed yield on individual years and combined over years, and in all locations. All interactions which related to G × E interaction showed significance (P>0.001) for DM and seed yield. The highest yield (4789 kg ha-1) was obtained from the leafed genotype 'Urunlu'. However, stability analysis indicated that for DM yield, the leafed genotypes 'Golyazi' and 'Urunlu' should be grown in low yielding and high yielding environments, respectively. Cluster analysis, based on grouping locations, showed that P101 was the preferred variety in low yielding environments, and P98, in high yielding ones. It was suggested that the use of both stability and cluster analyses might give better results. Comparison of cluster and stability analyses showed that the stability analysis fails to recommend cultivars to different regions where yield potential showed significant differences. It seems, however, that cluster analysis could be a powerful tool to examine G × E interaction. If the number of environments was sufficient, a separate stability analysis could be run in each cluster.Öğe Investigation on agronomical and quality characteristics of improved clonnes in Origanum (Origanum onites L.) breeding [İzmir kekigi (Origanum onites L.) islahinda geliştirilen klonlarin agronomik ve kalite özellikleri üzerinde araştirma](TUBITAK, 1999) Ceylan A.; Bayram E.; Geren H.Flora of west and southwest Anatolian regions are very rich in terms of Origanum species. A large amount of Origanum onites L. plants collected from the flora is consumed in Turkey and exported. In order to determine agronomical and technological characteristics of 14 improved donnes by selection of Origanum onites L populations collected flora of İzmir, Mugla and Antalya regions this study was conducted under Bornova ecological conditions. According to two years averages; drog herbage and drog leaf yield were obtained 12760 kg/ha, 7420 kg/ha, respectively. Essential oil rate varied from 2.61 % to 5.12 %, carvacrol rate varied from 70.73 % to 85.68 %.Öğe Performances of some cool season turfgrass cultivars in mediterranean environment: II. Festuca arundinacea Schreb., Festuca ovina L., Festuca rubra spp. rubra L., Festuca rubra spp. trichophylla Gaud and Festuca rubra spp. commutata Gaud(2010) Demiroglu G.; Geren H.; Kir B.; Avcioglu R.The commitment to turf research is more recent and is challenged by the diversity of climatic conditions occurring in Anatolian peninsula of Turkey. These differences in climatic factors and environmental variation may determine the specific adaptation of species to certain areas and complicate the species and cultivar recommendations. In this present study, aiming to evaluate the adaptability and quality of newly introduced cultivars of different cool season turfgrass species in a Mediterranean environment in western Turkey, Bornova-Izmir, four cultivars of Tall fescue (Festuca arundinacea Schreb), Sheep fescue (Festuca ovina L), Festuca rubra L. spp. trichophlylla Gaud (Slender creeping red fescue) and Festuca rubra spp. rubra commutata Gaud (Chewings red fescue) and six cultivars of Festuca rubra spp. rubra L. (Creeping red fescue) were tested for 3 years (2003-2005) in a replicated experimental block group design. Turf cover, colour and quality traits of these cool season turfgrass cultivars were evaluated by using a visual score (1-9) and the target of the generated information was the support turfgrass specialist in turfgrass cultivars selection and recommendations and research institutions for their breeding programs. Results indicated that tall fescue cultivars were the only genotypes maintaining high scores of cover, colour and quality in different seasons and years. Sheep fescue cultivars were also consistent throughout the experimental years, although their colour, cover and quality scores were not high. We also suggested that all red fescue sub-species were not fully adaptable to Mediterranean conditions and their usage had to be limited in turf mixtures.Öğe Seed yield of Persian clover (Trifolium resupinatum L.) as affected by row distance and herbicide applications(Asian Network for Scientific Information, 2007) Algan N.; Çelen A.E.; Avcioglu R.; Geren H.; Uzun A.The experiment on the effects of row distances and herbicide applications on the seed yield and some characteristics of Persian clover (Trifolium resupinatum L.) was conducted in 1998-1999 and 1999-2000 growing seasons in Bornova, Izmir, Turkey. The experimental design was split-plots design with three replications. Row distances were 20, 30 and 40 cm and the herbicides were imazethapyr, imazamox and bentazone. Imazethapyr is not a suitable herbicide for weed control in Persian clover. Bentazone must be used for broad-leaved weeds such as Anagallis caerula, Matricaria chamomilla, Polygonum aviculare, Sinapis arvensis and Stellaria media. It had an effect on Fumaria parviflora in second year, only. In case of presence of wild oat (Avena sterilis) and some broad-leaved weeds such as Sinapis arvensis, Anagallis caerula, Polygonum aviculare and Stellaria media, it is thought that imazamox is useful to achieve a satisfactory seed yield. The row distance had an effect on the number of lateral branches per plant and 1000 seed weight. Herbicide applications affected the number of lateral branches per plant, the number of heads per plant and seed yield. The highest seed yields were obtained from the control, imazamox and bentazone applications and the yields were 799, 733 and 712 kg ha-1, respectively. Although there were no statistical important differences among the row distances, more seed yield (752 kg ha-1) was obtained from the row distance of 40 cm. © 2007 Asian Network for Scientific Information.