Browsing by Author "Aktaş H."

Now showing 1 - 2 of 2

Evaluation of bread and einkorn wheat under in vitro drought stress
(Pakistan Agricultural Scientists Forum, 2017) Aslan D.; Aktaş H.; Ordu B.; Zencirci N.
The purpose of this study was to investigate the resistance of bread and einkorn wheat genotypes under in vitro conditions against drought stress during germination. Twelve bread and ten einkorn wheat genotypes were used as plant material and seven drought stress levels were applied based on a three-replicate factorial restricted randomized block design in order to investigate their effects on germination rate (GR), germinating power (GP), coleoptile length (CL), shoot length (SL), root length (R L), shoot root length ratio (SRLR), root fresh weight (RFW), root dry weight (RDW), and root fresh dry weight ratio (RFDWR) during the year 2014 -2015. PEG-6000 was used to evaluate the effect of drought stress under in vitro conditions on the wheat genotypes. The values of all traits were decreased by the increased effect of PEG levels (p ? 0.05). The results of the variance analysis showed that the genotypes had significant statistical differences for the examined traits under drought stress (p < 0.05). According to the results of the GGE biplot analysis, of the total variation between the genotypes and traits investigated under drought stress (75.97%), PC1and PC2 represented 51.51% and 24.47%, respectively. In addition, einkorn wheat populations were located in the sector of GR, GP, and SRL, which means that these populations had a greater performance for these traits under drought stress conditions. Bread wheat and einkorn genotypes behaved differently for the traits under drought stress. It is considered that the results of the field and in vivo experiments for cold and drought stress will contribute to producing reliable suggestions. © 2017, Pakistan Agricultural Scientists Forum. All rights reserved.
Evaluation of some barley (Hordeum vulgare L.) cultivars commonly cultivated in Turkey under supplemented irrigation and rainfall conditions [Türkiye'de yogun ekim alanina sahip bazi arpa (Hordeum vulgare L.) çeşitlerinin destek sulamali ve yagişa dayali koşullarda degerlendirilmesi]
(Namik Kemal University - Agricultural Faculty, 2017) Aktaş H.
This study was conducted to investigate yield and some agronomic traits of 10 regisreted barley cultivars (Hordeum vulgare L.) in Turkey in rainfall and supplemented irrigation conditions during 2011-12 and 2012-13 growing seasons at Diyarbakir/Çinar, Turkey. Experiments were arranged according to Completely Randomized Block Design with four replications. Obtained data was evaluated with variance analysis and GGE biplot method. Also, the barley cultivars were evaluated regarding to drought tolerance indices. According to mean of two years data grain yield of cultivars ranged from 417 to 578 kg/da in supplemented irrigation condition and from 281 to 391 kg/da in rainfall condition, while the mean of invastigated traits in supplemented irrigation and rainfal condition were 41 g and 38 g for 1000 kernel weight, 68 kg/hl and 62 kg/hl for test weight, 513 adet/m2 and 367 adet/m2 for number of spikes in sequmeter respectively. According to GGE biplot results G3 and G5 was determined as most stabil cultivars for grain yield. The highest grain yield was obtained in G3, G9, G5 and G10 for mean of the supplemented and rainfall conditions respectively (irrigation condition: 578; 533; 520; 550 kg/da, rainfall condition: 363; 365; 391 ve 363 kg/da). According to GGE biplot G9 is suitable for rainfall condition and G3 for irrigation condition. It was determined that YI (Yield index), was related to grain yield in rainfall condition, thus this parameter could be used in breeding programs to determine drought tolerance genotypes. The other drought tolerance indices such as HM (Harmonic Mean), GMP (Geometric Mean Productivity), STI (Stress tolerance index), MP (Mean productivity) and TOL (Tolerance) were related to grain yield in irrigation condition, so these parameters can be used to determine genotypes that suitable for irrigaton condition. © 2017 Namik Kemal University - Agricultural Faculty. All rights reserved.