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Search Results: 1 - 10 of 752 matches for " Petrovi? Sofija "
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Genetic erosion of diversity in cereals
PetroviSofija,Dimitrijevi? Miodrag
Genetika , 2012, DOI: 10.2298/gensr1202217p
Abstract: Cereals play an important role in human nutrition. Consequently, one of the main goals in breeding is to obtain varieties with high genetic potential for yield. Modern agricultural production includes the expansion of intensive varieties over large areas that lead to narrow selection criteria in breeding programs. The consequence is a drastic reduction in the number of species and genotypes (genetic erosion), or harming biological diversity of local populations, and spontaneous relatives (biodiversity) in cereals. Based on detailed inventories of the territory of Montenegro and to some extent in Eastern Serbia, a endangerment of gene pool in cereals could be denoted. The reason for this is a transition to another type of agricultural production, changing land purposes, the presence of nursing homes, and use of intensive varieties. Old varieties and local populations represent the original genetic variability that could be used in breeding programs and organic production. It is therefore essential to take measures to preserve the genetic resources of cereals.
Variability of plant height and harvest index of various wheat genotypes cultivated on chernozem and solonetz
Kapor Zoran,PetroviSofija,Dimitrijevi? Miodrag
Genetika , 2006, DOI: 10.2298/gensr0601075k
Abstract: Solonetz is a type of halomorphic soil which is present on 80 000 ha in Vojvodina. Field experiments were conducted during 1999/2000 vegetation periods, involving eleven wheat genotypes cultivated on solonetz, location Kumane, and on chernozem, location Rimski an evi. The variability of plant height and harvest index on different soil types was investigated, as well as the correlation between these two yield parameters. The goal of this research was to establish the significance of various genotypes and soil type effects on plant height and harvest index, as well as the reaction of genotypes regarding different amelioration rates on solonetz.
The effect of wheat-rye translocation 1BL.1RS in a different quality genetic background on biological traits in wheat
Dimitrijevi? Miodrag,PetroviSofija,Gustafson Perry J.
Genetika , 2008, DOI: 10.2298/gensr0803261d
Abstract: A sample of 139 varieties of common wheat (Triticum aestivum L.), predominantly Serbian winter wheat varieties originated in the Institute of Field and Vegetable Crops in Novi Sad, has been examined for presence of 1BL/1RS wheat-rye translocation. Two genotype groups consisted of varieties possessing and lacking the translocation have been compared. Stem rust, leaf rust, powdery mildew as well as, winter hardiness were studied. The influence of 1BL/1RS translocation was also studied in a light of wheat seed storage protein (glutenin and gliadin) genetic background composition. Genotypes having the translocation appeared to be more tolerant to stem rust, and leaf rust, but more susceptible to powdery mildew. These effects were slightly modified depending on the examined genetic background, but the effect of the rye 1RS translocated chromosome arm was the main cause for the observed differences.
Wheat breeding in abiotic stress conditions of solonetz
Dimitrijevi? Miodrag,PetroviSofija,Banjac Borislav
Genetika , 2012, DOI: 10.2298/gensr1201091d
Abstract: The complex stress environment at locality Kumane (Banat) primarily is caused by alkaline soil of solonetz type, but includes the other sources of wheat variability, water-logging and occasional extreme temperatures, as well. In order to obtain wheat varieties that could fulfill the requirement of enhanced tolerance to abiotic stress conditions of alkaline soil a set of wheat varieties was examined in parallel trials in Kumane (solonetz), and at Rimski an evi on chernzem (black soil). The multiyear results helped to select usable wheat genetic material among the existing varietal genetic variability. That variability was used as parents in in situ established crosses. The results in segregating F2 offspring surpassed the average parental values for examined traits - plant height, grain number and grain weight per spike. Hence, selecting desirable genetic variability in novel variability through years could lead to wheat plant ideotype capable to bring forth a economically justified yield.
Electromyographic activity of the temporal and masseter muscles at different occlusal positions
Petrovi? ?or?e,Horvat-Bani? Sofija
Medicinski Pregled , 2007, DOI: 10.2298/mpns0704134p
Abstract: Introduction. Normal occlusion or eugnathia, is a morphologically and functionally balanced bite. Differences in the form and function of orofacial structures cause morphological and functional deviations of the orofacial system. Irregular occlusal positions may consequently change the electromyographic activity of the muscles of orofacial region. The aim of the research was an analysis and a comparative analysis of the bioelectrical activity of masticatory muscles in normal occlusion and distocclusion, in rest position, in the position of the central occlusion of the mandible and at the maximum voluntary muscle contraction. Material and methods. The metodology of the research is based on electromyographic recording of the action potentials of the examined muscles in different mandibular positions. Registration of action potentials of the masticatory muscles was done using, facial, intramuscular, and coaxial electrodes, (Greenfield scheme) and measurements were performed on both sides. The research was carried out on a sample of 60 patients with an average age of 14,25 years. 30 subjects had normal occlusion and 30 had distal occlusion. Results. The results were expressed in microvolts, as average cumulative amplitude voltages of action potentials, by means of which changes in the masticatory muscles were established and the degree of correlation between the electromyographic activity of the masticatory muscles and the occlusal type was analyzed. Conclusion. The results of the research show that the bioelectrical activity of the examined masticatory muscles falls in the group of subjects with distal occlusion, which is the result of a decreased number of active muscular tissues, or a decreased number of impulses coming into the muscle, or the combination of both. .
The variation of yield components in wheat (Triticum aestivum L.) in response to stressful growing conditions of alkaline soil
PetroviSofija,Dimitrijevi? Miodrag,Beli? Milivoj,Banjac Borislav
Genetika , 2010, DOI: 10.2298/gensr1003545p
Abstract: The paper presents the results of experiments with 11 varieties of wheat grown in alkaline soil stressful conditions. The experiment was set up at the site in the Banat, on the non-ameliorated solonetz soil, as control variante, and with ameliorative measures using phosphogypsum. The phenotypic variability and genotype by environment interaction for the grain number and weight per spike, using AMMI model in three vegetation seasons were studied. The analysis of the results revealed that the tested varieties responded differently to external, stressful conditions and ameliorative measures. Based on the AMMI analysis results the significance of PCA axis was observed.
Stability of yield components in wheat (Triticum aestivum L.)
Dimitrijevi? Miodrag,Kne?evi? Desimir,PetroviSofija,Ze?evi? Veselinka
Genetika , 2011, DOI: 10.2298/gensr1101029d
Abstract: Variability and stability of yield components for the large number of divergent common wheat genotypes originated in different world breeding institutions were studied. Interaction genotype x environment has been evaluated, in different environmental conditions. The experiment was performed using randomized block design in three replications on the experimental field in different environmental conditions. A total number of 60 plants have been analyzed in the full maturity stage. The analyzed cultivars showed very significant differences in the average values of analyzed traits. The significant influence of cultivars, year and their interaction on expression of traits was found. The effects of each of analyzed traits on phenotypic variability were different. The most stable genotypes have been determined for analyzed yield component. On the base of stability and phenotypic variability the genotypes can be used as parents in wheat breeding programs.
Phenotypic reaction of wheat grown on different soil types
Dimitrijevi? Miodrag,PetroviSofija,Mladenov Novica,Beli? Milivoj
Genetika , 2009, DOI: 10.2298/gensr0902169d
Abstract: Phenotypic variation of nine wheat varieties under different growing conditions was followed. Trials were conducted on solonetz, humoglay and black soil. The yield, as well as, the plant height, spike length and harvest index were studied. The effect of different environments on varietals phenotypic variability, with the emphasis on genotype by environment interaction, was analyzed using AMMI model.
Spike stability parameters in wheat grown on solonetz soil
PetroviSofija,Dimitrijevi? Miodrag,Beli? Milivoj,Banjac Borislav
Genetika , 2009, DOI: 10.2298/gensr0902199p
Abstract: Phenotypic variability of the number and grain weight per spike, as well as the spike length of wheat varieties NSR-5, Evropa 90 and Pobeda creation of the Institute of Field and Vegetable Crops in Novi Sad was studied. The trial was conducted at the village Kumane locality in Banat on solonetz soil. Control and two levels of amelioration (25t/ha and 50t/ha of phosphor gypsum) in three vegetation periods were followed. The variety Evropa 90 exhibited maximal values of all examined spike traits in all years of study. Significant value of the first PCA was denoted for the grain number and the grain weight per spike, using AMMI model.
Methodology For Modeling Rural Development - Case Study From The Western Balkans
Sofija Adzic
South East European Journal of Economics and Business , 2007, DOI: 10.2478/v10033-007-0018-9
Abstract: This paper tries to find more efficient approach to defining the attributes and goals of rural development policy. The proposed methodology for defining the future role of rural regions within the socio-economic framework of the Western Balkans enables a very precise and transparent definition of rural development goals.
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