scholarly journals Effect of conditions of locality, variety and fertilization on the content of ascorbic acid in potato tubers

2008 ◽  
Vol 53 (No. 6) ◽  
pp. 252-257 ◽  
Author(s):  
K. Hamouz ◽  
J. Lachman ◽  
P. Dvořák ◽  
O. Dušková ◽  
M. Čížek
Keyword(s):  
Ascorbic Acid ◽  
Czech Republic ◽  
Field Trials ◽  
N Fertilization ◽  
Favourable Effect ◽  
Potato Tubers ◽  
The Czech Republic ◽  
Average Temperature ◽  
Negative Effect

The effect of conditions of locality, variety and fertilization on ascorbic acid (AA) content in potato tubers was investigated in precise field trials in 2004 and 2005 in the Czech Republic. From four localities and in the two-year average the highest AA was statistically determined in the locality of Prerov nad Labem with the highest average temperature values during both experimental years (by 6.7 to 11.5% higher in comparison to other localities). Similarly, the effect of variety was also very significant; Marabel variety had the highest AA content (207.2 mg/kg fw) and exceeded other seven varieties by 15−49%. A negative effect on AA content in tubers was observed in the case of an increased intensity of N fertilization (at 180 kg N/ha AA decrease was lower by 6.1% compared to doses 100 kg N/ha). On the contrary, a favourable effect was determined at increased levels of potassium and magnesium fertilization (at 166 kg K/ha and 60 kg Mg/ha AA increase was by 6.2% higher compared to the levels of 108 kg K/ha and 30 kg Mg/ha).

scholarly journals Differences in anthocyanin content and antioxidant activity of potato tubers with different flesh colour

2011 ◽  
Vol 57 (No. 10) ◽  
pp. 478-485 ◽  
Author(s):  
K. Hamouz ◽  
J. Lachman ◽  
K. Pazderů ◽  
J. Tomášek ◽  
K. Hejtmánková ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Field Trials ◽  
Anthocyanin Content ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Total Anthocyanin ◽  
The Czech Republic ◽  
Total Anthocyanin Content ◽  
Lowland Area

The aim of this study was to determine that the total anthocyanin content (TAC) and antioxidant activity (AOA) in potato flesh with different colours grown in the Czech Republic. Four yellow- or white-, six purple- and four red-fleshed varieties were grown in 2009 at two different sites (Valečov – highland, seed potato area at 460 m a.s.l., Přerov nad Labem – lowland, new potatoes area at 178 m a.s.l.) in precise field trials. For purple- and red-fleshed varieties, average TAC values ranged from 61.5 to 573.5 cyanidin mg/kg of FM and significant effect of the variety of the TAC was found. High content reached the Violette and Vitelotte varieties with dark purple flesh, and the lowest content the Blue Congo variety with light purple marbled flesh. Significantly higher TAC was found in a lowland area Přerov nad Labem, which is probably related to drought stress. The lowest AOA was achieved by a group of varieties with yellow or white flesh – averaging 82.8 mg ascorbic acid equivalent/kg FM, in a group of red-fleshed varieties it was higher 4.34 times and in a group of purple-fleshed varieties even 5.03 times higher. Also between purple-and red-fleshed varieties significant differences in AOA were found, both high and low values of AOA showed the same varieties as in the case of the TAC. Among experimental sites higher AOA was also demonstrated at Přerov nad Labem. Correlation analysis showed a strong correlation between AOA and TAC (r = 0.8099).

scholarly journals Effect of selected factors on the content of ascorbic acid in potatoes with different tuber flesh colour

2009 ◽  
Vol 55 (No. 7) ◽  
pp. 281-287 ◽  
Author(s):  
K. Hamouz ◽  
J. Lachman ◽  
P. Dvořák ◽  
M. Orsák ◽  
K. Hejtmánková ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Ascorbic Acid Content ◽  
Vegetation Period ◽  
Field Trials ◽  
N Fertilization ◽  
Mineral Fertilization ◽  
Flesh Colour ◽  
Group Of Seven ◽  
Tuber Flesh ◽  
Negative Effect

In precise field trials in the years 2004–2008 in the Czech Republic the effect of conditions of location, variety and mineral fertilization on ascorbic acid content (AA) in potatoes with different tuber flesh color was investigated. Significant was the effect of variety. The Marabel variety with the highest AA content (248 mg/kg FW) exceeded other eight varieties by 13.4–74.1%. The Valfi variety, in five-year trials the only variety with purple colored flesh, ranked among analyzed varieties moderately below average. In addition, in the year 2008 the group of seven varieties with purple and red tubers was evaluated and AA content lower by 15.2% compared to the group of varieties with yellow flesh was determined. Also, significant differences were determined between the varieties with coloured tubers; the highest AA content was found in the red-fleshed variety Highland Burgundy Red (234 mg/kg FW). A negative effect on AA content in tubers was observed at increased intensity of N fertilization (at 180 kg N/ha, AA decreased by 12.4% compared to 100 kg N/ha). Enhanced levels of potassium and magnesium fertilization had no effect on the AA content. The effect of location on AA content was not shown; however, from the four locations in average of five years a pronounced trend of the highest content of ascorbic acid on the location Přerov nad Labem with the highest temperature averages during vegetation period of experimental years was determined (by 0.9°C, 2.3°C, and 5.9°C higher compared with other locations).

scholarly journals Loose Monetary Policy and Corporate Investment of Manufacturing Firms in the Czech Republic

2018 ◽  
Vol 18 (4) ◽  
pp. 371-385
Author(s):  
Veronika Kajurová ◽  
Dagmar Linnertová
Keyword(s):  
Monetary Policy ◽  
Czech Republic ◽  
Interest Rates ◽  
Corporate Investment ◽  
Manufacturing Firms ◽  
Investment Activity ◽  
The Czech Republic ◽  
Low Interest Rates ◽  
Negative Effect

Abstract The aim of the paper is to evaluate the effects of loose monetary policy on corporate investment of manufacturing firms in the Czech Republic during the period between 2006 and 2015. The main focus of the paper is on the effect of low interest rates on investment activity of Czech firms; additionally, the effects of interactions between interest rate and other firm-specific variables are investigated. The results indicate that corporate investment is positively associated with firm size, investment opportunities, and long term debt. Also, a negative effect of the cash position is found. Further, the findings show that monetary policy is a significant determinant of firm investment activity: when the monetary policy is loose, investment is positively affected. Furthermore, differences in the determinants of investment between highly and low leveraged firms were revealed.

scholarly journals Development of mergers in the Czech Republic in 2001–2010

2012 ◽  
Vol 60 (4) ◽  
pp. 133-140 ◽  
Author(s):  
Eva Hýblová ◽  
Jaroslav Sedláček ◽  
Zuzana Křížová
Keyword(s):  
Czech Republic ◽  
Mergers And Acquisitions ◽  
Theoretical Research ◽  
Commercial Law ◽  
The Czech Republic ◽  
Economic Practice ◽  
Negative Effect ◽  
The Creation ◽  
Access To Knowledge ◽  
The Right

One of consequences of the substantial market globalization is company transformations, which essentially affect the creation, existence or dissolution of companies; their number has been on the increase in recent years. They are mergers and acquisitions; mergers represent a combination of companies, whereas acquisitions involve selling, purchase or investments of companies. The main reason for a merger is economic growth which can be provided in various ways: these are e.g. decreases in costs, strengthening of a position in the market or access to new markets, decrease in prices and thus gaining new customers, access to knowledge or diversification of risks.The process of a merger is a highly demanding matter which includes the economic view (a choice of the right partner, setting merger objectives, preparation of merger project) and the legal view as the merger involves commercial law, reporting and taxation legislation. Discrepancies in the legal, reporting and taxation procedures in the area can have a negative effect on the process of merger and economic practice. The development of mergers and acquisitions and their success rate is related to the development of the economic and legislative environment. An important aspect is also the successfulness of mergers in the following year which will confirm (or not) the quality of all previous decisions.Research studies conducted in this field focus on mergers with the aim to evaluate procedures during mergers. An important part of research is an analysis of the effect of a merger on the evaluation of the successor company’s performance, changes in capital and capital structure of the entities. The aim of the paper is to publish first partial results in this direction of research. The first part of the research focuses on the creation of a database of companies as this is essential for practical verification of the results of the theoretical research. Due to the fact that there is no similar official statistics in the Czech Republic, its creation needs to be devoted great attention. It is also vital to define the transactions which will be included in the total number so that the results are relevant.

scholarly journals Evaluation of gooseberry cultivars resistance to the American gooseberry powdery mildew Sphaerotheca mors uvae Schwein and its chemical control

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 583-587
Author(s):  
M. Vaverka ◽  
S. Vaverka
Keyword(s):  
Biological Activity ◽  
Czech Republic ◽  
Powdery Mildew ◽  
Chemical Control ◽  
Biological Effect ◽  
Field Trials ◽  
The Czech Republic ◽  
Biological Efficacy ◽  
Extensive Field ◽  
Susceptibility Evaluation

In the course of 1993–2001 extensive field trials were carried out to evaluate the resistance (susceptibility) level of 34 gooseberry cultivars to the American gooseberry powdery mildew Sphaerotheca mors uvae Schwein. Cultivars originated from the Czech Republic and from other European countries. Each tested cultivar had 7 trees (5–10 years old). Beside the resistance (susceptibility) evaluation, biological efficacy of 9 fungicides using EPPO methods has been checked at the same number of cultivars and at the same number of gooseberry trees. Highly significant differences of resistance or susceptibility were observed among gooseberry varieties. Analogical results (differences in biological activity of fungicides) have been attained in the course of chemical treatment. 18 cultivars has been classified as low resistant, 12 cultivars as moderate resistant and 4 cultivars as high resistant. None of the tested fungicides proved perfect biological efficacy (100% healthy berries). 4 of them proved high biological effect (more than 90% healthy berries), 3 proved low biological activity (less than 75% healthy berries) and 2 proved moderate biological activity (75–90% healthy berries).

Does housing market impair employment in The Czech Republic?

2015 ◽  
Vol 8 (3) ◽  
pp. 318-334 ◽  
Author(s):  
Martin Konecný ◽  
Dominik Stroukal
Keyword(s):  
Czech Republic ◽  
Panel Data ◽  
Design Methodology ◽  
Detrimental Effect ◽  
Western World ◽  
The Czech Republic ◽  
Content Type ◽  
Negative Effect ◽  
Building Societies ◽  
Practical Implications

Purpose – The main aim of this paper is to find whether homeownership can have detrimental effect on employment in The Czech Republic. Design/methodology/approach – Oswald’s conjecture is tested on the set of panel data across Czech regions between the years of 2005 and 2012. Findings – By testing a model similar to Oswald’s, this paper receives the similar result that the rate of homeownership leads to higher rate of unemployment in following years. The second model tested in the paper does not support previous findings that regional rate of homeownership has negative effect on individual’s probability of being unemployed. Research limitations/implications – Findings of this paper are valid only for The Czech Republic. Possible refinements to the model are presented as inspiration for further research. Practical implications – Results bring a powerful argument into debate about subsidization of homeowners through building societies. Originality/value – This paper is a first examination of Oswald’s hypothesis in The Czech Republic. It opens a debate about whether Oswald’s conjecture holds outside of the Western world.

scholarly journals Severity of powdery mildew on winter barley in the Czech Republic in 1976–2005

2008 ◽  
Vol 43 (No. 3) ◽  
pp. 77-85 ◽  
Author(s):  
A. Dreiseitl
Keyword(s):  
Czech Republic ◽  
Powdery Mildew ◽  
Disease Severity ◽  
Field Trials ◽  
Winter Barley ◽  
Sources Of Resistance ◽  
The Czech Republic ◽  
High Infection ◽  
High Disease Severity ◽  
Important Disease

Results of scoring the reaction to powdery mildew of 240 winter barley varieties that were gradually included in 392 Czech Official Trials conducted at 21 locations were analysed. The reaction of the varieties was determined on the basis of the level of infection by the disease. Therefore, the data can also be used to assess the disease severity in years and at locations. Several characteristics indicative of disease severity were considered, including the disease severity coefficient (= average infection of susceptible varieties in trials with a high disease severity/the proportion of such trials). The value of the coefficient is inversely proportional to disease severity. The highest powdery mildew severity was found in 1976, and the years 1988, 1990 and 2003 were characterised by high infection of the examined varieties. In contrast, the disease was practically absent in 1979 and 1982, and its severity was also low in 1978, 1981, 1985, 1991 and 1998. Very low disease severity was found for the period 1977–1982 when insufficient disease severity was found on average in 78% of the trials and high disease severity in only 6% of the trials. The highest disease severity was found at locations Trutnov, Horažďovice and Chrastava. The analysis of data from a large number of field trials conducted at various locations for a period of 30 years confirmed that powdery mildew is an important disease of winter barley in the Czech Republic. Known genetic sources of resistance and current methods, such as marker assisted selection, enable breeders to solve this problem.

scholarly journals The effect of inbreeding on the growth ability of meat sheep breeds in the Czech Republic

2021 ◽  
Vol 66 (No. 4) ◽  
pp. 122-128
Author(s):  
Michaela Černá ◽  
Michal Milerski ◽  
Michala Mušková
Keyword(s):  
Czech Republic ◽  
Inbreeding Coefficient ◽  
Regression Coefficients ◽  
The Czech Republic ◽  
Sheep Breeds ◽  
Negative Effect ◽  
Meat Sheep ◽  
Growth Ability

The aim of this study was to present the trend of inbreeding and to estimate the effect of inbreeding on the growth ability of lambs in the three most common sire breeds in the Czech Republic: Suffolk (SF; n = 49 345), Charollais (CH; n = 14 189) and Texel (T; n = 10 481). The growth ability of lambs was evaluated between 2000 and 2019 based on the weight at 100 days of age. The average inbreeding coefficient for Suffolk, Charollais and Texel was 0.013, 0.012 and 0.011, respectively. The average number of known generations was 5.260 for Suffolk, 3.355 for Charollais and 3.709 for Texel. To evaluate growth ability, lambs were divided into four groups according to the inbreeding coefficient (F = 0.00, 0.00 < F ≤ 0.062 5, 0.062 5 < F ≤ 0.125, F > 0.125). The results of this study show the negative effect of inbreeding on the growth ability of lambs was significant (P < 0.05). The regression coefficients of the weight for Suffolk, Charollais and Texel lambs for a change of 1% in inbreeding were estimated to be –0.028, –0.053 and –0.048, respectively.

scholarly journals Determination of the cluster of wheat rust resistance genes Yr17, Lr37, and Sr38 by a molecular marker

2012 ◽  
Vol 38 (No. 2) ◽  
pp. 41-45 ◽  
Author(s):  
M. Ambrozková ◽  
F. Dedryver ◽  
V. Dumalasová ◽  
A. Hanzalová ◽  
P. Bartoš
Keyword(s):  
Czech Republic ◽  
Molecular Marker ◽  
Rust Resistance ◽  
Yellow Rust ◽  
Field Trials ◽  
Aegilops Ventricosa ◽  
The Czech Republic ◽  
Wheat Rust ◽  
Rust Resistance Genes

A translocation from Aegilops ventricosa carrying genes Yr17, Lr37 and Sr38 was verified in cultivars Hussar, Eureka, Torfrida, Renan, Rendezvous, Rapier and Brigadier by the molecular marker SCARSC-Y15. Of the cultivars recently registered in the Czech Republic, only the western European cultivars Corsaire, Apache, Complet and Bill possessed the translocation carrying Yr17, Lr37 and Sr38. Cultivars Corsaire, Apache, Bill and Complet were highly or medium resistant to yellow rust and leaf rust in 1999–2001 field trials at Prague-Ruzyně, although virulence to Yr17 was found in the 2001 virulence survey also in the Czech Republic. Cultivars Corsaire, Apache and Bill displayed an above average resistance to stem rust, whereas Complet was susceptible.

scholarly journals Physiologic Specialization of Wheat Leaf Rust (Puccinia triticina Eriks.) in theCzech Republic in 2001–2004

2011 ◽  
Vol 42 (No. 4) ◽  
pp. 126-131 ◽  
Author(s):  
A. Hanzalová ◽  
P. Bartoš
Keyword(s):  
Czech Republic ◽  
Leaf Rust ◽  
Puccinia Triticina ◽  
Field Trials ◽  
Wheat Leaf Rust ◽  
The Czech Republic ◽  
Wheat Leaf ◽  
Winter Wheat Cultivars ◽  
Physiologic Races ◽  
Different Parts

In 2001–2004 virulence of the wheat leaf rust population in the Czech Republic was studied on Thatcher near-isogenic lines with Lr1, Lr2a, Lr2b, Lr2c, Lr3a, Lr9, Lr10, Lr11, Lr15, Lr17, Lr19, Lr21, Lr23, Lr24, Lr26 and Lr28. Samples of leaf rust (180 in total) were obtained from different parts of the Czech Republic. Resistance genes Lr9 and Lr19 were effective to all tested isolates like in the previous years. Unlike the previous years virulence on Lr24 and Lr28 was observed. Relatively effective were also Lr1, Lr2a, Lr24, Lr28 and Lr2b. Other Lr genes were defeated by the majority of the tested samples. Our results transformed to the numbers of physiologic races indicate that race 61SaBa prevailed like in the previous years, followed by races 61, 2, 12SaBa, 2SaBa, 14, 77SaBa, 12, 57, 6, 53, 53SaBa, 77, and 14SaBa. Twenty-one winter wheat cultivars registered in 2001–2004 were tested with 8 leaf rust isolates. Out of them 15 showed resistance at least to one rust isolate. High resistance recorded in field trials for cvs Batis and Ilias, which were susceptible to all tested rust isolates at the seedling stage, demonstrates the importance of field (partial) resistance.  

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