Browsing by Author "Oral, E."

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Effect of Nitrogen Fertilization Levels on Grain Yield and Yield Components in Triticale Based on Ammi and Gge Biplot Analysis
(Corvinus University of Budapest, 2018) Oral, E.
This study examined the effects of nitrogen doses rate on grain yield (GY) and yield components of spring triticale (×Tritico secale) cultivars in dry area, based on cultivars plus cultivar × nitrogen doses interaction GGE biplot and AMMI analysis. The research was designed to evaluate the effects of different nitrogen fertilization levels (0, 40, 80, 120 and 160 kg ha-1 of N) on the grain yield and agronomic performance of two cultivars in two growing seasons (2015-16/2016-17). Split plot layout with in randomized complete block design with 3 replications was used in both years. The response to fertilization levels were evaluated through GGE (Genotype main effects and Genotype x Environment interaction) biplot graphic methodologies and regression. Combined analysis of variance of nitrogen applications of two cultivars showed highly significant (p < 0.01) difference between the cultivars, nitrogen applications and interaction. The grain yield of triticale was most of all affected by cultivars (70.8%) and then by nitrogen doses (23.5%) and interaction (5.7%). On the other hand, the study showed that plant height, number of spikes per m², number of grain of ears and grain yield increased depending on the increasing nitrogen doses of the cultivars. The highest performance of grain yield of both cultivars were associated with nitrogen N3 (120 kg/ha) fertilization in regression and AMMI analysis. The results showed that 80 kg/ha N application can be recommended in triticale traits and grain yield with Esin (new) cultivar. Further more, we found that the GGE biplot method generated highly useful results with high visual quality in the study. © 2018, ALÖKI Kft., Budapest, Hungary.
Effects of various plant densities and nitrogen doses in some triticale (x Triticosecale wittmack ex. A. Camus) cultivars in Van city ecological conditions;
(Centenary University, 2016) Oral, E.; Ülker, M.
This study was conducted by randomized blocks divided by split-split plots trial design with three replications in Van city ecological condition 2009-2010 and 2010-2011 years. The research was planned and carried out with 4 nitrogen doses (2.7, 5.4, 8.1, 10.8 kg N/da) × 3 cultivars (Presto, Mikham-2002, Karma-2000) × 4 seed rate (350, 450, 550 ve 650 seed/m2) × 3 replication =144 parcel. According to the average of years, the plant height has been changed between (113.3-106.8) cm; the number of ears per square meter between (620-572) number; the number of grains per spike between (46.0-44.2); thousand grain weight between (40.4-38.7) g and grain yield between (3437-3270) kg ha-¹ respectively. Among the studied agricultural characters, plant height, the number of spike per square, the number of grains per spike and grain yield were increased depending on increasing nitrogen dose and sowing density in all varieties. In this study, according to the average years the high grain yield (5203 kg ha-1) was obtained from Karma-2000 variety, the third frequency (550 seed rate m-2) and the fourth dose of nitrogen (108 kg N da-1) application. Accordingly, Karma-2000 demonstrated superior performance in terms of plant height, spike number per square meter, number of grains per spike and grain efficiency. It was concluded that Karma-2000 varieties can be grown in the Van city ecological condition and winter with success. © 2016, Centenary University. All rights reserved.
Investigating the Quality of Durum Wheat Landraces and Determination of Parents To Use in Breeding Programs
(Corvinus Univ Budapest, 2019) Kendal, E.; Eren, A.; Dogan, Y.; Oral, E.; Koyuncu, M.; Doğan, Yusuf
The study was conducted to evaluate the quality of durum wheat grain. For this reason, genetic resources are crucial for the identification of parents and the enrichment of the gene pool that can be used in the development of new varieties for better nutrition of people. For this purpose, 131 populations of landraces, 9 promising line and 5 new varieties were used. The experiment was set up in randomized blocks with 7 replications, according to the augmented (increased) experimental design in 2015-2016 growing season. In the study, we examined total nitrogen content, protein ratio, CIE (Commission Internationale Eclairage) wheat color analysis (L* brightness, b* jaundice, a* redness) of 145 genotypes of durum wheat seeds. According to analysis of variance, highly significant differences (P < 0.05 or P < 0.01) were determined for total nitrogen, protein content and CIE L* value, while differences were not significant for b* value and a* value. The superiority of the genotypes was determined by the first two principal components (IPC1 (principle component) and IPC2) in order to create a two-dimensional GT biplot. The sum squares of the first two components were accounted by 45.34% (PC1) and 40.03% (PC2) for genotypes. The GT (genotype x trait) biplot indicated that 9 (nine) sectors occurred among genotypes and quality parameters. On the other hand, three groups occurred among the quality parameters based on the genotypes. The scatter plot demonstrated that there is a high correlation between b* jaundice, and a* redness. The results showed that cultivars and more landraces have general adaptability for all quality parameters, while some genotypes (G79, G78), (G22, G102), (G3) and (G121, G5) showed specific adaptation for N (nitrogen), PC (protein content) and L*, a* and b* values, respectively. According to the biplot techniques, G36 came forward with the N, P and a* value and desirable landraces, G5 for b* value, G30 stable line for all quality parameters, while (G128, G61) and the majority of promising lines (L4, L6) did not come forward with any quality parameters. The results of the study indicated that the majority of landraces can be used as parents to improve the quality of durum wheat varieties. The study indicated that GT biplot can be used to evaluate the genotypes graphically to select the best genotypes for parents to use in breeding programs.