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Articles by Sabri Gokmen
Total Records ( 2 ) for Sabri Gokmen
  Mehmet Ali Sakin , Sabri Gokmen and Ahmet Yildirim
  The aim of the study was to select mutant lines having a better agronomic potential than the mother variety Sofu of durum wheat (Triticum durum Desf.) in the M6 and M7 generations. The seeds were either irradiated with γ rays at Cobalt 60 (60Co) or treated with Ethyl-Methane-Sulfonate (EMS). Selection of mutants was carried out in the segregating (M2, M3) generations. Mutants were first tested for yield and other agronomic characteristics in the M4 and M5 generations. Twelve selected mutants and the mother variety Sofu were examined in the M6 and M7 generations for yield and quality characteristics. The experiments were organized in a Randomized Complete Block Design with 3 replications. Results revealed that any of these mutants could be used directly as new varieties. However, Sfga-7 showed yield stability across different environments, but the increases were not significant compared with Sofu. Sfga-5 had percentages of yellowberry kernels close to those of Sofu in both generations. This line with its high quality is a promising parent candidate for quality breeding. Therefore, more information on the new years and locations would greatly facilitate the evaluation of these lines. In addition, the utilization of the reduced plant height of Sfga-8 by crossing to the Sofu or other varieties could give rise to new lines whose agronomic features could be superior to those of both parents.
  Mehmet Ali Sakin , Ahmet Yildirim and Sabri Gokmen
  Genetic variability induced by mutagen treatments has maintained in the generations. The increases in variability resulted in the selection of superior mutant types for yield and yield components are used successfully in wheat breeding. The aims of the study were: (I) to select mutant lines with good yielding properties by comparing mutant lines with mother cultivars for agronomic traits in the M4 and M5 generations and (ii) to advance the selected lines to the following generations. The lines used in the experiment were selected from mutant populations of durum wheat cultivars (Sofu and Gediz-75) treated with etil-methane-sulfonate (EMS). The mutants were identified by visual screening for short straw, long spike and confirmed by measuring some characters of theoretical and practical interest in the M2 and M3 generations. The mutants with good yielding properties as compared to the mother cultivars were transferred to the M4 generation. Eighteen of these lines were from cv. Gediz-75 and twelve were from cv. Sofu. The experiments were organized as a randomized complete block design with three replications. There were several mutant lines with higher or lower means than those of mother cultivars. Responses of the mutants depended on the environmental conditions. It is possible to select higher yielding mutant lines with also some important agronomic traits. Selection of high yielding mutant lines could be performed in the M5 and these lines as a breeding material transferred in the yield experiments. Thus, number of mutant lines can be decreased considerably by early selections in the M4 and M5. Mutant lines with desirable characters varied with cultivars. Gdem-1, 2, 7 lines of cv. Gediz-75 and Sfem-1, 2, 3 lines of cv. Sofu showed a better agronomic performance than the others
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