scholarly journals Molecular Identification and Karyological Analysis of a Rampant Aspen Populus tremula L. (Salicaceae) Clone

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Dmitry V. Politov ◽  
Yuri S. Belokon ◽  
Anna V. Shatokhina ◽  
Maryana M. Belokon ◽  
Nail A. Khanov ◽  
...  
Keyword(s):  
Population Genetic ◽  
Populus Tremula ◽  
Dna Identification ◽  
Model Trees ◽  
Karyological Analysis ◽  
Ssr Loci ◽  
Maternal Tree ◽  
The Republic ◽  
And Performance ◽  
Root Suckers

A rampant highly heterozygous aspen (Populus tremula L.) clone “Meshabash” has been revealed in course of population genetic diversity analysis in a native stand in the Republic of Tatarstan, Russia. Here we report the results of karyological analysis showing that this highly vigorous clone is diploid (2n=38) while typically triploid aspen demonstrates increased growth rate and resistance to aspen trunk rot caused by fungus Phellinus tremulae. By means of DNA identification of a series of model trees using 14 SSR loci we outlined the area occupied by this clone (at least 1.94 ha) and demonstrated that its ramets constitute 40 out of 48 genotyped trunks on the plot with the maximal distance between ramets 254 m. Since aspen is able to regenerate after cutting or die-off of maternal tree by root suckers at a distance up to 20–35 m this assumed that current stand appeared as a result of such spreading from an ortet tree during at least 5 generations. Trunk rot damage in the wood of model trees indicated low influence of this pathogen on viability and performance of the studied clone that can be associated with its extreme heterozygosity level (0.926) exceeding all the studied trees in this research plot and in three other control samples.

Hygienic assessment of learning environment conditions (by the example of higher educational institutions of the city of Ufa)

2020 ◽  
Vol 99 (4) ◽  
pp. 405-411
Author(s):  
Elena Ju. Gorbatkova
Keyword(s):  
Ionizing Radiation ◽  
Educational Institutions ◽  
Higher Educational Institutions ◽  
Factors Affecting ◽  
Republic Of Bashkortostan ◽  
Average Relative Humidity ◽  
Higher Educational ◽  
The Republic ◽  
And Performance ◽  
The City

Introduction. The important factors affecting health and performance of young people are the conditions of education, in particular, a comfortable microclimate in the classrooms of higher educational institutions. Materials and methods. In view of the urgency of this problem, an analysis was made of the microclimate parameters of educational organizations of different profiles (Ufa city, the Republic of Bashkortostan). 294 classrooms were studied in 22 buildings of 4 leading universities in Ufa. A total of 3,822 measurements were taken to determine the parameters of the microclimate. The analysis of ionizing radiation in the aerial environment of classrooms. There was performed determination of radon and its affiliated products content. In order to assess the conditions and lifestyle of students of 4 higher educational institutions of the city of Ufa, we conducted an anonymous survey of 1,820 students of I and IV years of education. Results. The average temperature in the classrooms of all universities studied was 23.9±0.09 C. The average relative humidity in all classrooms was 34.2 ± 0.42%. Analysis of ionizing radiation (radon and its daughter products decay) in the aerial environment of the classrooms and sports halls located in the basement determined that the average annual equivalent equilibrium volumetric activity of the radon daughter products (EROA ± Δ222Rn) ranged from 28 ± 14 to 69 ± 34.5 meter, which meets the requirements established by SanPiN. Conclusion. The hygienic assessment of the microclimate parameters of educational institutions of various profile revealed a number of deviations from the regulated norms. The results indicate the need to control the parameters of the microclimate, both from the administration of universities, and from the professors. According to the results of the study, recommendations were prepared for the management of higher educational institutions in Ufa.

scholarly journals Population genetic structure of pedunculate oak (Quercus robur L.) in Belarus according to the analysis of chloroplast DNA

2021 ◽  
pp. 59-70
Author(s):  
Vladimir E. Padutov
Keyword(s):  
Genetic Structure ◽  
Chloroplast Dna ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Quercus Robur ◽  
Phylogenetic Trees ◽  
Rflp Analysis ◽  
Pedunculate Oak ◽  
Maximum Likelihood Methods ◽  
The Republic

Pedunculate oak (Quercus robur L.) is one of the main forest forming species in the Republic of Belarus. Its population genetic structure was formed under the influence of various migration processes. Six chloroplast DNA loci (µdt1, µdt3, µdt4, µcd4, µcd5 and µkk4) were used for the genogeographic study. The material for the analysis was collected in 100 oak forest stands (2325 samples); 18 allelic variants were identified, which are grouped into 17 different combinations (haplotypes). Five of them are widespread (the proportion of occurrence varies from 7 to 48 %, totalling 85 %). The remaining 12 are rare (the proportion of occurrence varies from 1 to 3 %, totalling 15 %). Phylogenetic trees constructed using the nearest neighbour and maximum likelihood methods show the presence of two groups (branches) of haplotypes. One of it comprises 8 variants including 2 dominant haplotypes and the other comprises 9 variants including 3 dominant haplotypes. PCR-RFLP analysis of chloroplast DNA showed that the pedunculate oak in Belarus originates from the Balkan refugium. Haplotype No. 1 (µdt189, µdt3123, µdt4142, µcd494, µcd574, µkk4109) is found almost everywhere in Belarus with the exception of the southwest and northeast, while haplotype No. 8 (µdt189, µdt3121, µdt4142, µcd494, µcd574, µkk4109) is mainly localised in the southwest and northeast. Haplotypes No. 3 (µdt189, µdt3120, µdt4141, µcd494, µcd575, µkk4109) and No. 7 (µdt189, µdt3122, µdt4142, µcd494, µcd574, µkk4109) predominantly found in the west of the country. Haplotype No. 2 (µdt190, µdt3120, µdt4141, µcd495, µcd574, µkk4109) is typical for the southeast.

The construction of national musical identities by Greek Cypriot primary school children – implications for the Cyprus music education system

2007 ◽  
Vol 24 (3) ◽  
pp. 251-266
Author(s):  
Avra Pieridou-Skoutella
Keyword(s):  
Music Education ◽  
School Children ◽  
Rural Areas ◽  
Primary School Children ◽  
Musical Identity ◽  
Greek Cypriot ◽  
The Republic ◽  
And Performance ◽  
Urban And Rural Areas ◽  
Republic Of Cyprus

Drawing on ethnographic fieldwork with Greek Cypriot elementary school children in urban and rural areas of the Republic of Cyprus, the author describes and analyses the ways in which national musical identity is constructed in and out of school in connection with Cypriot traditional music. Findings reveal the development of fluid and often insecure, ambiguous and contradictory national musical identities as a result of the ideological messages children receive from their musical enculturation contexts. In addition public music education not only fails to assist pupils to become familiar with the tradition's inherent meanings and processes of creation and performance, but enhances children's contradictory ideological understanding and construction of an ambiguous national musical identity.

scholarly journals Quality Management in the Higher Education of the Republic of Moldova as a Framework for University Performance

2017 ◽  
Vol 64 (4) ◽  
pp. 431-446 ◽  
Author(s):  
Veronica Prisacaru ◽  
Aurelia Litvin
Keyword(s):  
Higher Education ◽  
Quality Management ◽  
Performance Management ◽  
Management System ◽  
Higher Education Institutions ◽  
Management Systems ◽  
Quality Management Systems ◽  
Republic Of Moldova ◽  
The Republic ◽  
And Performance

Abstract This investigation is focused on two objectives: 1) explaining the relationship between quality management and performance management in higher education; 2) evaluating the existing quality management systems in the higher education institutions of the Republic of Moldova. In order to accomplish the first objective, a comparative theoretical analysis of the quality management and performance management was carried out in terms of common aspects and distinctive peculiarities. Consequently, it was reasoned that the performance management system of a higher education institution is created and functions on the basis of the quality management system by extending the area of the quality objectives to the level at which they will ensure performance or, in other terms, by moving towards excellence. In order to achieve the second objective, an opinion survey for the teaching and managerial staff from 6 universities was carried out. As a consequence of processing the obtained results, there were identified problems related to the functioning of the quality management systems. The investigation resulted in the formulation of a set of recommendations for the higher education institutions of the Republic of Moldova in order to increase the efficiency of the quality management systems functioning and thus to ensure an efficient management.

Emergence and survival of Populus tremula seedlings under varying moisture conditions

2003 ◽  
Vol 33 (11) ◽  
pp. 2081-2088 ◽  
Author(s):  
Tarja Latva-Karjanmaa ◽  
Leena Suvanto ◽  
Kari Leinonen ◽  
Hannu Rita
Keyword(s):  
Seedling Emergence ◽  
Populus Tremula ◽  
Sowing Time ◽  
Large Numbers ◽  
Seedling Emergence And Survival ◽  
Negative Effect ◽  
Sowing Experiment ◽  
Moisture Conditions ◽  
Root Suckers ◽  
Survival Of Seedlings

Aspen produces large numbers of seeds, even though it mainly reproduces asexually with root suckers. The aim of this study was to find out how different moisture conditions affect emergence and survival of Populus tremula L. seedlings. This was studied with a sowing experiment (totally randomized factorial design). There were altogether 10 blocks, each containing 16 microsites and three treatments (sowing time, watering, sowing shelter) replicated twice in each block. Seedlings emerged on 56% of microsites. Sowing time affected seedling emergence. Both the proportion of microsites with seedlings and the number of seedlings per microsite were lower after first than after second sowing, when the weather was rainier. Watering increased the number of seedlings per microsite, but the proportion of micro sites with at least one seedling was not affected. Sowing shelter had a negative effect on the seedling emergence, especially after second sowing. The survival of seedlings was low (10%) and strongly dependent on watering. The effect of block and its interactions with treatments indicated that seedling emergence and survival depended also on seedbed conditions. We conclude that sexual reproduction of aspen may occur in nature, but it is rare. The seeds also maintained their germinability longer than earlier observed.

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