Miodrag Dimitrijević

Agrobiodiversity Genetic Variability Utilization in Organic Food Production

Summary The food production at the global level is about to meet its border. Industrialization of agriculture correlates with an explosive enlargement of human population, during XX and at the beginning of XXI centuries. An ongoing process of environmental erosion has been speeding up during that period, not only in our physical surrounding, but also in biodiversity. A new direction in agricultural food production is in demand. Organic food production has been recognized as the way of providing safety and quality food, preserving the environment in the same time. In the other hand new land areas have to be explored for agricultural use, in order to enhance food quantity to meeting the increasing demand for food. These targets set new requirements in plant breeding. To fulfill these requirements the genetic variability harbored in genetic resources has to be preserved, examined and put to good use.

Phenotypic Analysis of Agronomic Traits in Bread Wheat

Summary Components of yield and seed quality are traits of primary importance in bread wheat breeding programs. Yield components are obviously a major determinant of farmer’s income, whereas seed quality is very important for breeding quality. In this paper, the thousand grain weight (TGW) was chosen as indicative of yield features and the shelling percentage (RND) as indicative of seed quality (although RND is not directly connected to the technological/seed quality, but rather indirectly and it greatly contributes to the wider picture of seed quality). The objectives of the present research were two-fold: to determine the influence of genotype, the environment and their interaction on the thousand grain weight and shelling percentage and to evaluate the stability via the AMMI model. The grain samples were obtained from ten winter wheat cultivars grown in 2009/10, 2010/11, 2011/12 at three locations in Serbia: Novi Sad, Sremska Mitrovica and Pančevo. The ten winter wheat cultivars used in this study were: Evropa 90, NSR-5, Pobeda, Renesansa, Ljiljana, Cipovka, Dragana, Simonida, NS 40 S and Zvezdana. The thousand grain weight and shelling percentage were investigated and statistically analyzed via the AMMI model, which showed significant differences between genotypes at various locations and ASV rankings. The most favorable cultivar in the experiment was Dragana in terms of all investigated traits.

Variability of plant height and harvest index of various wheat genotypes cultivated on chernozem and solonetz

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 Sancevi. 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.