Browsing by Author "Ulker, M."

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Adaptation and Stability Analysis in the Selected Lines of Tir Wheat
(Pakistan Botanical Soc, 2006) Ulker, M.; Sonmez, F.; Ciftci, V.; Yilmaz, N.; Apak, R.
Genotype and environment (G x E) interactions are of major concern to plant breeders in breeding cultivars. The objective of this study was to determine the stability of grain yield in 12 wheat genotypes. Eleven lines selected from Tir wheat population (Triticum aestivum) were used in the study. The experiment was conducted in Van, Ercis, and Adilcevaz located in the eastern part of Turkey in 1997-98 and 1998-99. Two stability parameters were obtained as linear regression coefficient (b) of an entry mean on the average of all entries and deviation from regression (s(2)d), then stability was tested with the hypotheses b = 1.0 and s(2)d = 0. The results indicated that there were significant differences and interactions among genotypes, locations and years. The regression coefficient (b) values of the 11 genotypes used in this study ranged from 0.46 to 1.73; deviation from regression ranged from 69.9 to 2896.7. According to estimates of the two stability parameters, none of the genotypes were stable for grain yield. However, based on the linear regression coefficient and average grain yield, line 2 (Adilcevaz-40/1) and 11 (Van-Edremit/1) appeared to be promising because their yields were above the average in all of the environmental conditions of this study.
Energy Utilization and Growth Performance of Chickens Fed Novel Wheat Inbred Lines Selected for Different Pentosan Levels With and Without Xylanase Supplementation
(Oxford Univ Press, 2015) Pirgozliev, V.; Rose, S. P.; Pellny, T.; Amerah, A. M.; Wickramasinghe, M.; Ulker, M.; Lovegrove, A.
Different F5 recombinant inbred lines from the cross Yumai 34 x Ukrainka were grown in replicated trials on a single site in one harvest year at Rothamsted Research. A total of 10 samples from those lines were harvested and used in a broiler experiment. Twenty nutritionally complete meal-form diets that had 630 g/kg of wheat with different amounts of pentosan, with and without exogenous xylanase supplementation, were used to compare broiler growth performance and determine apparent metabolizable energy corrected for N retention (AMEn). We examined the relationship between the nutritive value of the wheat samples and their chemical compositions and results of quality tests. The amounts of total and water soluble pentosans in wheat samples ranged from 36.7 to 48.0 g/kg DM, and 6.7 to 11.6 g/kg DM, respectively. The mean crude oil and protein contents of the wheat samples were 10.5 and 143.9 g/kg DM, respectively. The average determined value for the kinematic viscosity was 0.0018 mPa.s, and 2.1 mPa.s for the dynamic viscosity. The AMEn of the wheat-based diets had a maximum range of 0.47 MJ/kg DM within the ten wheat samples that were tested. Xylanase supplementation improved (P < 0.05) dietary AMEn, dry matter, and fat digestibility coefficients. There was a positive (P < 0.05) relationship between in vitro kinematic viscosity of the wheat samples and the total pentosan content. There was a negative relationship between the total pentosan content in the wheat and broiler growth performance. An increase by 10 g of pentosan per kg of wheat reduced (P < 0.001) daily feed intake and weight gain by 2.9 g and 3.5 g, respectively. The study shows that the feeding quality of wheat samples can be predicted by their total pentosan content. Supplementary xylanase improved energy and nutrient availability of all wheat samples that was independent of differences in pentosan content.
Karyological Analysis on Wheat Tir (Triticum Aestivum Var. Aestivum L. Spp. Leucospermum Körn.) Ecotypes in Lake Van Basin, Turkey
(Association of Agricultural Technology in Southeast Asia, 2022) Najafi, S.; Ulker, M.; Altuner, F.; Oral, E.; Ozdemir, B.; Jamal Salih, S.; Selem, E.
Karyotypic is studied within ecotypes species which are importantly found with different ecotypes, and it may possible showing specific genomic adaptation with their environmental growing conditions. Chromosome karyotype and morphology in wheat Tir by analyzing chromosomes in five ecotypes (Ahlat, Ercis, Muradiye, Patnos and central part of Van) in order to present the best instruction for cytogenetic studies in chromosome analysis was investigatred. Pre-treatment with %1 alpha-bromo naphthalene, fixation in karnoy 1, hydrolysis in NaOH and staining by %2 Aceto-Orcein were proved using root meristem segments followed by studying the microscopic preparations. Karyotype analysis of each ecotype. There was separately performed and showing several indices (TL: Total Length, LA: Long Arm, SA: Short Arm, Sat: Satellite and AR: Arm Ratio). The somatic chromosome numbers of all studied ecotypes are hexaploid with 2n=6x=42 and the averages of chromosomes length ranged from 4.60 ±0.02 µm to 16.05 ±0.02 µm. The longest chromosome was observed in chromosome number 1 from ecotype 3 which belongs to Muradiye and the shortest one was related to the chromosome number 21 from ecotype 4 from Patnos. © 2022 Association of Agricultural Technology in Southeast Asia. All rights reserved.