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Search Results: 1 - 10 of 89016 matches for " ?ija?i?-Nikoli? Mirjana "
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Conservation and directed utilization of forest genetic resources
ijai?-NikoliMirjana,Milovanovi? Jelena
Glasnik ?umarskog Fakulteta , 2007, DOI: 10.2298/gsf0795007s
Abstract: Forest genetic resources represent the genetic diversity contained in the thousands of species of forest trees on the earth. their conservation is a set of activities and strategies, which are performed in the aim of ensuring the continued existence, evolution and availability of these resources for the present and future generations. the aim of genetic resource management is the enhancement of conditions for the continual evolution of the species which is the defensive mechanism of the organisms in the struggle with environmental changes.
Molecular markers applying in forest trees gene pool conservation
Milovanovi? Jelena,ijai?-NikoliMirjana
Glasnik ?umarskog Fakulteta , 2009, DOI: 10.2298/gsf0999101m
Abstract: Many studies performed during the last years demonstrated the usefulness of neutral molecular markers in the field of conservation and population genetics of forest trees, in particular to understand the importance of migration patterns in shaping current genetic and geographic diversity and to measure important parameters such as effective population size, gene flow and past bottleneck. During the next years, a large amount of data at marker loci or at sequence level is expected to be collected, and to become excellent statistical power for the assessment of biological and evolutionary value.
Model of Serbian spruce genetic diversity conservation applying MPBS method
Milovanovi? Jelena,ijai?-NikoliMirjana
Glasnik ?umarskog Fakulteta , 2007, DOI: 10.2298/gsf0795119m
Abstract: Multiple Population Breeding System (MPBS) means that the genetic conservation population is split into subpopulations with each having an effective population size of approximately 50 individuals (Namkoong, 1984). The main reasons for development of the MPBS is the need for preparation of adequate breeding strategy which would be useful in future breeding goals and environmental conditions changing processes. MPBS is dynamic and allows for adaptation via natural selection or breeding. In contrast to hierarchical systems that require several generations of back-crossing to introduce genes into the breeding population immediate changes of breeding goals are possible in MPBS breeding. The cost of running a MPBS programme is not expected to differ much from running a breeding programme with just one large breeding population. MPBS is very appropriate conservation method for endangered species due to future environmental and breeding aims changes. In this paper suggestion for conservation and improvement of Serbian spruce genetic diversity applying MPBS has been explained.
Genetic and no genetic variability of two-year old seedlings of 13 hybrid plane half-sib lines
Kne?evi? Radmila,ijai?-NikoliMirjana
Glasnik ?umarskog Fakulteta , 2005, DOI: 10.2298/gsf0592069k
Abstract: This paper presents the results of the analysis of variability of 8 analyzed morph metric parameters in two-year old seedlings of 13 half-sib lines at different levels. The recorded genetic and no genetic variability is conditioned by numerous different factors. The important causes of genetic variability are: partial incompatibility of parent trees, partial hybrid sterility, predominant inbreeding, frequent mutations with the growth of parent trees, very abundant gene recombination's, etc. The causes of no genetic seedling variability are: external environmental conditions (soil humidity, conditions of cultivation, sylvotechnical interventions, etc) and the internal or the somatic environment of seedling.
Assessment of heterotic effect in serbian spruce hybrid combinations
ijai?-NikoliMirjana,Isajev Vasilije
Genetika , 2004, DOI: 10.2298/gensr0403257s
Abstract: The occurrence and magnitude of heterotic effect was determined among hybrid combinations and parent individuals obtained by open pollination in Serbian spruce seedling seed orchard at Godovik. The heterotic effect was analysed for cone length and width and the average number of seeds per cone. The study results show the different heterotic effect, both for the same trait in different hybrid combinations and for different traits of the same hybrid.
Model of experimental clonal seed orchard for the production of Serbian spruce Picea omorika /Panc./Purkyne) intraspecific hybrids
ijai?-NikoliMirjana,Isajev Vasilije
Genetika , 2002, DOI: 10.2298/gensr0201011s
Abstract: The presented model for the establishment of an experimental clonal seed orchard of Serbian spruce was designed based on the results of the analysis and assessment of the genetic potential of Serbian spruce seedling seed orchard at Godovik. Based on the results of the analyses, eight superior half-sib lines of Serbian spruce were selected, of which 24 genotypes were selected. Their hybridisation, by the model of incomplete diallel cross resulted in 21 combinations at the level of half-sib lines, i.e. 48 combinations at the level of parent genotypes. The applied study methods identified the potentially valuable genotypes-cone producers i.e. pollinators, which will be fixed by cloning in the seed orchard of the second generation for the production of the promising hybrids.
The genetic potential of mother trees as a basis for Acer pseudoplatanus ‘Atropurpureum’ plant production
ijai?-NikoliMirjana,Ocokolji? Mirjana,Viloti? Dragica,Milovanovi? Jelena
Archives of Biological Sciences , 2011, DOI: 10.2298/abs1101145s
Abstract: Sycamore maple (Acer pseudoplatanus L.) is one of the most valuable species of Serbia’s noble hardwoods. Based on the results of previous research, it can be concluded that this is a species with a pronounced ecological plasticity and high genetic potential. From the aspect of ornamentalness, one of the most frequent cultivars in urban green spaces and tree rows is the cv ‘Atropurpureum’, also known as ‘Spaethii’ or ‘Purpureum’. It is distinguished by dark green leaf adaxials and purple undersides, which give the crown an extraordinarily attractive appearance. The genetic potential of the analyzed mother trees can be used for the mass production of the Acer pseudoplatanus ‘Atropurpureum’ and Acer pseudoplatanus plants needed for urban green area maintenance and creation of tree rows. Special attention should be paid to the potential of mother trees 5 and 3; their descendants, along with purple leaf undersides, also have high average height values for five-year old plants.
Comparative analysis of the anatomical structure of heartwood and sapwood selected Gymnocladus canadensis Lam. trees in Srpska Crnja
Viloti? Dragica,ijai?-NikoliMirjana,Miljkovi? Danijela,Ocokolji? Mirjana
Archives of Biological Sciences , 2011, DOI: 10.2298/abs1103831v
Abstract: This paper shows the results obtained from the study of the macroscopic-microscopic structure (capillary system) in the growth stem of Gymnocladus canadensis Lam. originating from North America, which grows in “Muzljanski rit” in the area of Srpska Crnja. Gymnocladus canadensis Lam. falls under the ring-porous species according to its porosity, with large tracheas in its early zone. The early zone trachea lumens, contained in the sapwood, reach dimensions of up to 160 μm, while early zone trachea lumens in the growth stem rings of the sapwood reach dimensions of up to 120 μm. Examination of the microscopic structure of this tree show good properties of the tree.
Population genetic characteristics of horse chestnut in Serbia
Ocokolji? Mirjana,Viloti? Dragica,ijai?-NikoliMirjana
Archives of Biological Sciences , 2013, DOI: 10.2298/abs1301001o
Abstract: The general population genetic characteristics of cultivated horse chestnut trees excelling in growth, phenotype characteristics, type of inflorescence, productivity and resistance to the leafminer Cameraria ohridella Deschka and Dimi were analyzed in Serbia. The analyzed population genetic parameters point to fundamental differences in the genetic structure among the cultivated populations in Serbia. The study shows the variability in all properties among the populations and inter-individual variability within the populations. The variability and differential characteristics were assessed using statistical parameters, taking into account the satisfactory reflection of the hereditary potential. The assessed differences in the vitality and evolution potential of different populations can determine the methods of horse chestnut gene pool collection, reconstruction and improvement. [Projekat Ministarstva nauke Republike Srbije, br. 31041: Establishment of Wood Plantations Intended for a forestation of Serbia]
Semi-dwarfs in the subspontaneous progeny and the synthesis of red oak dwarf cultivars
ijai?-NikoliMirjana,Tucovi? Aleksandar,Viloti? Dragica
Glasnik ?umarskog Fakulteta , 2004, DOI: 10.2298/gsf0490181s
Abstract: The main data on the occurrence of semi-dwarfs in the subspontaneous progeny of American red oak were researched. The grafting of scions from semi-dwarf trees on the stock of related species shortens the juvenile stage, i.e. accelerates the flowering, induces the self-fertilization and potential crossing of related species. The specific undertaking requires to: (1) define the desired type of the dwarf cultivar, (2) develop the model, and (3) plan the genetic nature of the conceived cultivar. The development of cultivars relies on the conceived and long-term activity.
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