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Öğe Evaluating leaf rust reactions of pure bread wheat landrace lines using non-parametric statistics(Springer, 2020) Hocaoglu, O.; Akan, K.; Akcura, M.This research aims to assess genotype x environment interactions (G x E) of the leaf rust (Puccinia triticina) reactions of 29 Turkish landrace-derived pure lines over seven environments. Field experiments were conducted in canakkale, Edirne and Samsun (Turkey) in three consecutive growing seasons from 2011-2012 to 2013-2014 under natural conditions. Leaf rust reactions of genotypes were recorded in accordance with the Modified Cobb scale. Genotype stabilities assessed by non-parametric stability statistics. Furthermore, a Principal Component Analysis (PCA) biplot of non- parametric stability statistics were used to compare their capability for capturing both stability and leaf rust reactions of genotypes in the given dataset. PCA Biplot results showed that non-parametric parameters of Thennarasu and Percentage Availability (PA) showed a positive association with mean disease severity while Rank Means (RM) were negatively associated. Non-parametric stability analyses revealed that Genotypes 29, 25 and 15 were the most stable pure lines when only 25 and 15 could be considered as resistant-stable. In order to determine both stability and leaf rust resistance in bread wheat, PA and RM are recommended.Öğe Examination of the changes in components of the volatile oil from Abyssinian sage, Musk sage and Medical sage [Salvia aethiopis L., Salvia sclarea L. and Salvia officinalis L. (hybrid)] growing in different locations(Consejo Superior Investigaciones Cientificas-Csic, 2019) Karayel, H. B.; Akcura, M.This study was conducted simultaneously in different locations in Canakkale, Balikesir and Kutahya in order to determine the effect of location on the volatile oil components, volatile oil rate and volatile oil quality of Abyssinian sage, Musk sage and Medical sage (Salvia aethiopis L., Salvia sclarea L. and Salvia officinalis L. (hybrid)) plants from the 2015 growing season. Field experiments were carried out in 3 replicates according to the randomized block design. These plants' volatile oils were obtained by the hydrodistillation method (GC-MS/FID) and the volatile oil rates in three different locations were measured as 0.53%, 0.21%, 0.20%, respectively. The basic components of the volatile oil were determined as follows: beta-caryophyllene 36.22%, 30.46%, 35.96%, alpha-copaene 15.06%, 16.46%, 16.58%, germacrene-D 13.23%, 20.01%, 15.20%, beta-cubebene 5.62%, 7.04%, 6.93%, alpha-humulene 8.68%, 7.40%, 8.54%, caryophylleneoxide 7.40%, 1.82%, 3.53%. No volatile oil was acquired from Salvia sclarea L. except for the Canakkale location which was only 0.02% and the main components in this volatile oil were measured as germacrene-D 20.78%, and phytol 17.81%. The best volatile oil contents from Abyssinian sage and Musk sage were obtained from the Canakkale location with 0.53% and 0.02%, respectively. The rates of volatile oils from Medical sage (Salvia officinalis L. (hybrid)) were 1.00%, 1.40% and 0.96%, respectively, in the three locations. The main components in this volatile oil were measured as alpha-thujone 46,00%, 44.53%, 35.78%, beta-thujone 5.05%, 6.31%, 8.61%, camphor 10.73%, 19.15%, 18.68%, 1.8-cineole 8.99%, 7.23%, 5.06%, viridiflorol 1.85%, 2.28%, 4.23%. The highest volatile oil rate in Medical sage was reached at the Balikesir location at a rate of 1.40%. As a result of this study it was found that volatile oil components are comparatively richer in terpenes and the amount of volatile oil differs according to ecological factors.Öğe GGE Biplot Analysis of Reactions of Bread Wheat Pure Lines Selected from Central Anatolian Landraces of Turkey to Leaf Rust Disease (Puccinia triticina) in Multiple Location-Years(Akademiai Kiado Zrt, 2018) Akan, K.; Akcura, M.The present study was conducted to determine the reactions of 88 bread wheat pure lines selected from landraces collected in Central Anatolian Region of Turkey against leaf rust (Puccinia triticina) under field conditions in 7 locations. GGE biplot analysis was used to determine the reactions of landrace genotypes against the disease. The GGE biplot explained 73.89% of total variation. Among the experimental locations, 6 (except for E3) were placed close to each other over the biplot graph, indicating two apparent mega-environments. The GGE biplot visually displayed the resistance and stability of the pure lines to leaf rust. The landrace genotypes L18, L19, L45, and L2 were identified as the most resistant/stable genotypes in all environments and L31 and L56 were the most susceptible/stable genotypes.Öğe Variations in grain mineral concentrations of Turkish wheat landraces germplasm(Wageningen Academic Publishers, 2017) Akcura, M.; Kokten, K.The study aimed to examine and interpret variability of some mineral contents in wheat genotypes throughout growing seasons. A collection of 86 landraces originated from different provinces in Turkey and 14 registered cultivars were studied during two successive years for variability of some mineral contents (Fe, Zn, B, K, Mn, Mo, Cu, Mg and Ca) in grain. Both correlation coefficients and genotype trait (GT)-biplot analysis were used to examine and interpret variability of mineral contents in wheat genotypes throughout growing seasons. According to the correlation analysis, there were positive relationships among Fe and Zn, Mn, Mg and Cu contents. Furthermore, the relationship between the concentrations of the elements indicated that the correlation coefficients were consistent with the results of the GT-biplot analyses. The highest variations were obtained from Fe and Zn concentrations along with the longest vectors from GT-biplot origin. Fe, Zn and Mn contents were the ideal traits, according to mineral contents scaling GT-biplot. These traits were recorded as the best representative of the overall mineral contents along the most powerful to discriminate genotypes. Pure line 22 was superior with respect to Fe, Zn and B composition, while pure line 47 was superior regarding Ca contents. Comparison between pure lines and modern cultivars led to the conclusion that Fe, Zn and Mn content of many pure lines were usually higher than those of modern cultivars. Moreover, mean grain concentrations of Fe, Zn and Mn in pure lines from landraces were significantly higher than all cultivars, 9.25, 14.82 and 6.75%, respectively. Therefore, some pure lines could be recommended to use as genetic material to enhance the genetic basis of bread wheat breeding programmes all over the world. © 2016 Wageningen Academic Publishers.
