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Articles by Hakan Ulukan
Total Records ( 3 ) for Hakan Ulukan
  Hakan Ulukan
  Aim of this study is to explain of the apomixes, utilization in the plant breeding and to indicate its importance in terms of biodiversity and environmental sustainability. Etymologically, apomixis comes from the Greek apo (= away from) and mixis (= act of mixing). Botanically, apomixis is a kind of biological reproduction process without fertilization and meiotic division. These types of plants produce with genetically identical seeds to their female parent. It is uncommon in the wild and rare in cultivated crops. If it is possible to exploit or harness this type of reproduction, then produce new cultivars more quickly and cheaply. Similarly, the breeding process will be significantly accelerated in related seed companies, furthermore, farmers and growers would be able to reduce costs in their production input/s in terms of, for example, the purchase of hybrid seed, time saving and the size of labor force, etc. or reach a maximum yield potential level. In spite of the many potential advantages, according to some researchers the development of commercial apomictics is making slow progress. However, other research from a multidisciplinary approach to apomictics indicates that all potential obstacles could be overcome in commercial production in the near future. With this contribution, thousand million persons who dye from hungry could be saved and their basic and vital requirements could be met.
  Hakan Ulukan , Mustafa Guler and Siddik Keskin
  The present study was carried out to investigate a path coefficient with one faba bean cultivar i.e. Filiz 99 and two advanced breeding lines i.e. H1=PN 55 K.No 584-066 Reine Blance and H2=PN 54 K.No 7954 x 964-92B. Relationships between yield and yield components were determined by using a correlation and a path-coefficient analysis in 1999-2000. In the investigated characters positive and significant relationships were found statistically between grain number pod-1and pod number plant-1; between biological yield and plant height; between biological yield and grain number pod-1. Direct and indirect effects of plant height, pod length, first pod height and pod number plant-1 and grain number pod-1 upon biological yield were calculated. The total determination coefficient was found as 0.636 (63.6%) in the model which we used.
  Hakan Ulukan and Ekrem Kun
  This study was carried out at the University of Ankara, Faculty of Agriculture, Haymana Research and Application Farm, Haymana County, Ankara, Turkey during 1987/1990 with the aim of to determine the effect of between and on row distances (Brd and Ord, respectively) on the first development, tillering, yield and yield components in wheat cultivars (Triticum sp.). Five wheat cultivars (Bezostaja-I, Gerek 79, Haymana 79; Triticum aestivum L., Cakmak 79 and Kunduru 1149; Triticum durum Desf.) were used and experimental design was arranged in a Randomized Completely Block Design (RCBD) in split plots with four replications. The cultivars were allocated to the main plots at three different Brd (5, 10 and 17.5 cm) and six various Ord (4.7, 2.2, 1.2 cm in commons and 3.8, 1.8, 1.0 cm in durums) values. Brd and Ord distances were not affected from emergency date; the number of plant m-2 was varied between 173-326; the number of tillering was m-2 was determined between 12-86; the number of the first root was changed 3-4; the length of the adventitious root was happened between 89-116 mm; the number of the adventitious root was varied between 2-3 mm; the length of the adventitious root was realized between 42-74 mm; the number of the downy brome (Bromus inermis Leyss.) was changed between 7-16; plant height was measured between 45-73 cm; spike length was recorded between 62-81 mm; the number of spikelet was determined between 16-23; the number of grain was found between 19-30; grain weight per plant was calculated between 1-2 g plant-1; 1000-kernel weight was varied between 18-44 g and grain yield per m2 was fixed between 119-208 g m-2. Increasing in the Brd and Ord were negatively effected the adventitious root development so to ensure a long and fertile spike, narrow Brd and Ord distances should be used. Spikelet and grain number, 1000-kernel weight and grain yield per m2 were increased by narrowing either between nor on row distances. In addition, all the Brd parameters were not significantly effected to seedling traits in commons but not in durums. Brd = 17.5 cm was found the most beneficial distance in durums. On the other hand, to avoid reducing of the yield components, between row distance should not be increase and in all circimcustances, that value always must be adjusted wide otherwise control of the weeds, diseases and pest could be a great problem during the cultivation.
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