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Phenotyping spring barley for drought tolerance
Klem, Karel ; Findurová, Hana ; Panzarová, K. ; Pytela, J. ; Trtílek, M. ; Holub, Petr
Drought tolerance is a complex of traits that vary depending on the type, severity, and timing of drought. Therefore, a relatively comprehensive assessment of the morphological and physiological phenotypic response to drought is necessary. This methodology focuses on the development of procedures and evaluation of the complex phenotypic response of spring barley genotypes to drought using non-invasively measured parameters based on red-green-blue (RGB) imaging, thermal infrared imaging, and chlorophyll fluorescence imaging measured within an automated phenotyping platform. The development of the methodology was based on an experiment in which the dynamic changes in the response of six barley genotypes, representing a wide range of drought tolerance (from a very sensitive to a very tolerant genotype), to continuous drying until the point of wilting and subsequent re-watering were monitored. Three critical time points during drought and re-watering were identified, key for detecting drought tolerance: i) reaching 50% of available soil water, ii) reaching wilting point, iii) full plant recovery after re-watering. However, the different imaging-based parameters monitored showed potential for assessing drought sensitivity at different time points from the onset of drying or recovery. The correlation with relative yield response increased progressively for the side projected leaf area (SPA) and reached a maximum at the point of complete recovery after re-watering. The actual quantum yield of photosystem II (ΦPSII) showed the highest correlation with relative grain yield around the wilting point. In contrast, the relative difference of leaf temperature to ambient air temperature (Tdiff) showed a high correlation with yield response to drought earlier, as early as at the point of reaching 50% of the level of soil water available to plants. The highest correlations with relative yield response were obtained for RGB colour analysis at the wilting point and after recovery, especially for the relative proportion of khaki, beige, dark green, and olive-green hues. Multiple regression with parameters providing a Pearson correlation coefficient R > 0.5 slightly improved the estimation of the relative yield response to drought, but mainly provided a significant improvement in the estimation of absolute grain yield under drought stress, with an estimation accuracy of around 90% in both cases. This methodology shows that the use of a combination of phenotyping methods in characterising different morphological and physiological traits not only allows the assessment of drought tolerance (based on relative yield response to drought), which is crucial for the selection of genetic resources for subsequent breeding, but also allows the testing of the yield performance of new genotypes under drought stress.
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The financial performance of the real estate fund
Loubalová, Alice ; Petráš, Bohumil (referee) ; Ptáček, Roman (advisor)
The thesis on the topic "The financial performance of the real estate fund" will address all aspects influencing the financial performance of the selected real estate fund with the aim of proposing concepts for its future improvement. The first part of the thesis will describe the basic principles of functioning of the real estate market, together with the specification of the legal framework of investment funds in the Czech Republic and financial indicators of basic criteria for assessing financial performance. The second analytical part will deal with the historical analysis of the chosen fund, comparison of relevant financial indicators with the benchmark, and overall summary of its performance. Finally, suggestions for improvement based on the results of the previous section will be developed.
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Comparison of Yield Production in Common Wheat and Durum Wheat
ŠVEJDA, Josef
The topic of the bachelor's thesis is a comparison of yield formation in spring vari-eties of seeded wheat and durum wheat. Two varieties of seed wheat (Alicia, Regis-tana) and one variety of durum wheat (Tamadur) were selected. The experiment was based on a small plot of land of the University of South Bohemia in České Budějovi-ce. The seeded wheat variety Alicia showed the highest number of ears per m?, which contributed to the best actual yield. On the contrary, her weight of a thousand grains was the weakest. The second seeded wheat variety excelled in ear length and number of grains. Durum wheat achieved the worst results in the tests, with a several times lower number of fertile shoots than the Alicia variety. Even though it had the weakest actual yield, it excelled with the best thousand-grain results. In terms of quality parameters, durum wheat achieved the best results in bulk weight, slump number and nitrogen content. On the contrary, it showed the worst values in the sedimentation value, where it was surpassed in particular by the variety Alicia.
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Evaluation of combine harvesters John Deere 670i and Claas Lexion 770
JURÁSEK, Martin
This bachelor thesis evaluates the John Deere 670i and Claas Lexion 770 combine harvesters in terms of cost, threshing quality, losses and area performance. The thesis describes the functions of the combine harvesters and their technological description and practical applications. The parameters calculated in the bachelor thesis are pre-harvest and harvest losses, area and weight performance, mass yield, travel speed, crushing quality, fuel consumption and fixed and variable costs.
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Characterization of minor fruit varieties in terms of use in the food industry
Jurečková, Zuzana ; Vítová, Eva (referee) ; Golian, Jozef (referee) ; Diviš, Pavel (advisor)
The thesis deals with one group of small fruits, the genus Ribes, ie currants, and gooseberries. It assesses their physical and chemical parameters with respect to the possibility of use in these properties for the design of a new type of product – beverages. Titration, spectrometric and other methods were used for the evaluation of these properties. A total of fifteen of these methods were available (total juice yield, juice pH, total dry matter, soluble fruit dry matter, titratable acidity, formolic number, reducing carbohydrate content, D-glucose, D-fructose and sucrose content, total polyphenolic substance content, anthocyanins, vitamin C and total antioxidant capacity) and a total of nine analytes (copper, iron, magnesium, phosphorus, zinc, manganese, potassium, calcium and sodium) were selected for the determination of mineral elements. For two years (harvest 2014 and 2015), these parameters were monitored for color variants of currants (white, red and black) and gooseberries (green-fruited, yellow-fruited and red-fruited). A total of six white varieties were tested in the group of currants - Olin, Jantar, Primus, Blanka, Viktoria and Orion, eleven varieties of red currants - Junnifer, Jesan, Detvan, Rovada, Rubigo, J.V.Tets, Tatran, Losan, Kozolupský raný, Stanca, NŠLS 11/6 and eleven varieties of black currant varieties - Ometa, Démon, Triton, Ben Hope, Ruben, Ben Gairm, Ben Lomond, Moravia, Ben Conan, Fokus and Ceres. A total of five varieties of green-fruited gooseberries were tested - Zebín, Mucurines, Rixanta, Rodnik and Prima. Yellow-fruited gooseberries were available in four varieties - Lemon Giant, Invicta, Golden Fig and Darek. The red-fruited gooseberries included varieties - Rolonda, Alan, Karat, Karmen, Krasnoslawjanskij, Himnomacki Rot, Remarka, Tamara and Black Neguš. Using Tukey's test, an analysis was performed and by scoring individual varieties based on the results of individual analyzes, a list of recommended varieties was compiled for further work on the development of a new beverage. Unfortunately, in 2015 there were very few fruits of green-fruited and yellow-fruited gooseberries, so it was decided that the volume of fruit will fall on the testing of bioactive substances. Therefore, at the end of the work, it is not possible to objectively evaluate these varieties of gooseberries in the whole range of analyzes. Therefore, the point evaluation of varieties was based on the averages of individual varieties. The red-fruited varieties were available in full, and therefore a full evaluation could take place. The most significant differences between red gooseberry varieties were in the content of bioactive substances (the content of polyphenolic substances, anthocyanin dyes, and vitamin C) and antioxidant capacity. These results were provided to the food subject, which continued to work with these values. Based on this project, utility model No. PUV 2016-33171 and the resulting combined drink based on wine and fruit juice were developed.
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A Critical Analysis of Investment Opportunities in the Property Market
Matha, Jan ; Fajkus, Jiří (referee) ; Škapa, Stanislav (advisor)
The thesis is dedicated to the issue of the real estate market,considering it in the context of before, during and after the crisis. It deals with the property invesments through mutual funds, investment companies and unit trusts, with tax and legal benefits of these investments and their financing. It monitors all the segments of the real estate market development. Its models will cover future optimistic, pesimistic and realistic scenario of the real estate markets.
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Comparison of Activ Managed Funds Collective Investment with Index Funds
Plundra, Tomáš ; Blank, Martin (referee) ; Rejnuš, Oldřich (advisor)
The bachelor thesis is focused on comparison of activ managed funds of collective investment with index funds. The first part defines notion of collective investment, its subjects, advantages and disadvantages. Second part analyses current situation of collective investment in the Czech republic and it compares open-end-fund with ETF. Thesis contains results of comparison of specific criteria and it helps to enlarge information about new possibilities of investment.
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Influence of elevated carbon dioxide concentration on the quality of wheat flour
Zítková, Jana ; Vránová, Dana (referee) ; Hrstka, Miroslav (advisor)
This work treats of influence of carbon dioxide increased concentration on wheat yield and quality of wheat grains and flour. It focuses above all on total content nitrogenous substances in flour, content of proteins, gluten and bake charackteristics. Generally, increased carbon dioxide concentrations cause an increase of wheat yield and decrease of total content of nitrogenous substances. Gluten content is lower and that is why the bake properties are worse too.
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