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| Registros recuperados: 31 | |
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| Konvalina, Petr; Capouchova, Ivana; Stehno, Zdenek; Moudry, Jan. |
| Organic farmers look to the possibilities of growing neglected crops, such as the spring forms of hulled wheat – einkorn, emmer and spelt – for support in developing the organic farming system. In 2008, 169 landraces from the gene bank at the Crop Research Institute in Prague were tested on certifi ed organic plots. The experiment was aimed at fi nding suitable varieties for the organic farming system. In summary, our fi ndings show that einkorn (Triticum monococcum L.) and emmer wheat [Triticum dicoccum Schrank (Schuebl)] are resistant to powdery mildew and brown rust, spelt wheat (Triticum spelta L.) is less resistant to these two diseases, and the intermediate forms of bread wheat are very sensitive to such infestation. The varieties evaluated incline... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2010 |
URL: http://orgprints.org/20768/1/JOA.pdf |
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| Moudry, Jan; Konvalina, Petr; Stehno, Zdenek; Capouchova, Ivana; Moudry, Jan (Jr.). |
| Wheat genetic resources may be grown in organic farming systems or in less favourable areas for bread wheat species. Characteristics of hulled wheat species (23 varieties of einkorn, emmer wheat, spelt wheat) were studied and evaluated within a two-year trial period (which was executed on certified organic fields) and they were compared to characteristics of landraces and modern bread wheat varieties. The main aim of our study was to evaluate the potential uses of genetic resources of wheat in organic farming. The hulled wheat species were resistant to mildew and brown rust. Their grains were less contaminated with DON than the grains of the control varieties. The grain yield rate was reduced. Per hectare crude protein yield was higher in spelt and emmer... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2011 |
URL: http://orgprints.org/20763/1/SRE.pdf |
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| Konvalina, Petr; Capouchova, Ivana; Stehno, Zdenek; Moudry, Jan (Jr.); Moudry, Jan (Jr.). |
| Tetraploid emmer wheat [(Triticum dicoccum (Schrank) Schuebl] has become a more attractive crop for growing in marginal areas and for the organic farming system. As it provides a lower yield rate and has a specific quality, it is an exclusive food crop. Therefore, the proportion and nutritive quality of particular essential amino acids (threonine, valine, isoleucine, leucine, tyrosine, phenylalanine, lysine, methionine) and the total protein content were studied and evaluated in three-year trials carried out in two different localities. Furthermore, old and modern bread wheat varieties were compared. Results of our research confirmed a high crude protein content in grains of all the landraces of the emmer wheat. The emmer wheat variety contained 5% more... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Crop health; Quality; Protection. |
| Ano: 2011 |
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| Konvalina, Petr; Capouchova, Ivana; Stehno, Zdenek; Huda, P.; Blaha, Ladislav; Moudry, Jan (Jr.); Moudry, Jan. |
| Council Regulation (EC) No. 834/2007 of 28 June 2007 on organic production and labelling of organic products, and Commission Regulation (EC) No. 889/2008 of 5 September 2008 laying down detailed rules for the implementation of Council Regulation, are the most important European legislative instructions on organic farming. They lay down a permit to use just organic seeds for establishment of organic crop stands. Such seeds have to originate from the plants being grown in compliance with organic farming rules for at least one generation. Organic farmers are obliged, in compliance with the above-mentioned legislation, to use seeds originating from organic production when establishing crop stands. Otherwise, they are allowed to use their own seeds or they may... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2011 |
URL: http://orgprints.org/20764/1/Iasi_PK_2011.pdf |
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| Konvalina, Petr; Stehno, Zdenek; Capouchova, Ivana; Huda, Petr; Moudry, Jan; Moudry, Jan (Jr.). |
| Organic farmers are obliged, in compliance with the valid legislation, to use seed originating from the organic production when establishing the crop stands. In a survey we found certified organic cereal seed is used on 6 %, conventional untreated seed on 37 %, and farm seed on 57 % (of the organically farmed area in the Czech Republic). The main reasons for that are as follows: the insufficient surface of land intended for the reproduction of organic seed, the low proportion of accepted seed coming from the accepted reproduction surface. Therefore, low-quality farm seed is used on a large proportion of organically farmed land, which has a negative effect on the yield level of the cereals. These observations were also confirmed by results obtained in a... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2011 |
URL: http://orgprints.org/20758/1/CZU_2011_PK_Aktu%C3%A1ln%C3%AD_situace__%2D_bioosiva.pdf |
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| Konvalina, Petr; Stehno, Zdenek; Capouchova, Ivana; Zechner, Elisabeth; Berger, Sandra; Grausgruber, Heinrich; Janovska, Dagmar; Moudry , Jan. |
| Hulled wheat species (einkorn, emmer, spelt) are presumed to be an alternative to bread wheat in organic agriculture since the yield penalty is less pronounced under organic farming and generally higher prices can be achieved for specialty grains. The present study analyzed differences between wheat species with respect to biomass production, harvest index, grain yield and protein content. Spring hulled wheat genetic resources and bread wheat check cultivars were grown in organic field trials in the Czech Republic and Austria between 2010 and 2012. Generally, hulled wheat species were inferior in grain yield and distribution of assimilates to the grain compared to modern bread wheat. Biomass production of some emmer and spelt landraces was similar to bread... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems Breeding; Genetics and propagation. |
| Ano: 2014 |
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| Konvalina, Petr; Stehno, Zdenek; Capouchova, Ivana; Moudry, Jan; Sramek, J.; Moudry, Jan (Jr.). |
| For the organic farmers there is important question which varieties of wheat are right for organic farming in Less Favoured Areas. Modern varieties of wheat are bred in the conditions of conventional (high imput) farming. That is why the organic farmers asked about the suitability of land races of soft wheat (Triticum aestivum L.) or different species like emmer wheat grown in the past (Triticum dicoccum SCHUEBL). The paper results from the study of fourty land races, two intermediate and ten modern varieties of soft wheat in comparison to ten land races of emmer wheat at two locations in the Czech Republic. We evaluated tuft shape, length of plant, length and width of flag leaf, length and density of spike and awnedness. The modern varieties of soft... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2009 |
URL: http://orgprints.org/20774/1/Differences_in_the_morphological_characteristics_of_the_land_races_of_the_soft_and_emmer_wheat_in_relation_to_the_modern_varieties.pdf |
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| Konvalina, Petr; Capouchova, Ivana; Stehno, Zdenek; Moudry, Jan. |
| Emmer wheat (Triticum diccocum Schrank) belonged to the most frequent species of cereals in the past. Nowadays, it is grown in arid and montane areas in particular. Interest in this cereal species has increased, as it is tolerant to biotic and abiotic stressing factors. Therefore, yield parameters were evaluated in three-year (2007, 2008 and 2010) trials that were carried out in two different localities in the Czech Republic. Results of the research were compared to characteristics of four old and two top modern bread wheat (Triticum aestivum L.) cultivars. The emmer wheat varieties were resistant to usual wheat diseases. They formed their yield by a quantity of productive tillers (2.5), whereas the varieties of bread wheat had less productive tillers... |
| Tipo: Journal paper |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2012 |
URL: http://orgprints.org/20759/1/AJAR_2012.pdf |
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| Konvalina, Petr; Moudry, Jan; Dotlacil, Ladislav; Stehno, Zdenek; Moudry, Jan (Jr.). |
| As water deficiency becomes a more frequent cause of the reduction in wheat yield levels, the search for donors of drought tolerance to be bred into adapted land races becomes urgent. Drought tolerance has been evaluated by the 13C discrimination method in six land races of emmer wheat (Triticum dicoccum SCHRANK), compared with land races, obsolete cultivars and modern varieties of soft wheat (Triticum aestivum L.). The results of a two-year trial show that most of the genetic resources of emmer wheat, and intermediate land races of wheat are predisposed to drought tolerance. These varieties respond to dry conditions more sensitively, as they close their pores earlier (a lower value of the discrimination of 13C isotope). As for other land races and the top... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry Breeding; Genetics and propagation. |
| Ano: 2010 |
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| Stehno, Zdenek; Paulickova, I.; Bradova, J.; Konvalina, Petr; Capouchova, Ivana; Maskova, E.; Gabrovska, D.; Holasova, M.; Fiedlerova, V.; Winterova, R.; Ouhrabkova, J.; Dotlacil, Ladislav. |
| Emmer wheat cultivated by organic farmers is used as a component of some bio (organic) food products. Its positive influence on consumer health is caused by grain composition. In the set of 8 emmer wheat accessions, the main grain components, bread making characteristics and contents of health supporting chemical substances such as total dietary fibre content and its components, content of total polyphenols plus catechin and ferulic acid contents, vitamins of the B group and E plus total content of carotenoids were evaluated by standard methods. |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Crop health; Quality; Protection. |
| Ano: 2011 |
URL: http://orgprints.org/20765/1/JLS%2DE_20100728%2D1.pdf |
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| Konvalina, Petr; Capouchova, Ivana; Stehno, Zdenek; Moudry, Jan (Jr.); Moudry, Jan. |
| Fusarium infestation and DON content were studied in genetic resources of spring wheat (einkorn, emmer wheat, spelt wheat, intermediate forms of bread wheat). The study aimed at the comparison of grain contamination rates in various wheat species being grown in organic farming systems. The trials were established on certified organic parcels in two different localities in the Czech Republic in 2009 and 2010. The PCR method and specific primers were used to detect Fusarium. The proportion of deoxynivalenol (DON) was indicated and measured by the immuno-affinity chromatography (ROSA® DON Quantitative Test). The grain DON contamination rate (1.25 mg/kg) was set up in compliance with the European Commission (EC) Regulation No. 1126/2007. This regulation sets... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Crop health; Quality; Protection. |
| Ano: 2011 |
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| Konvalina, Petr; Capouchova, Ivana; Stehno, Zdenek. |
| As organic farmers are searching for new market and sale opportunities, the organic farming system may grow and process a wider range of species than the conventional farming system. Concerning wheat especially the hulled wheat species einkorn, emmer wheat and spelt wheat are in recent years of growing interest for organic farmers. Field trials were carried out at three Czech locations from 2009 to 2010 to study the performance of 4 einkorn, 8 emmer wheat and 7 spelt wheat accessions. All trials were spring sown and bread wheat variety SW Kadrilj was used as check. The results show that some accessions of the hulled wheat species are inclined to lodging. On the other hand, they are resistant to foliar diseases, e.g. powdery mildew and leaf rust. Hulls... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Breeding; Genetics and propagation. |
| Ano: 2012 |
URL: http://orgprints.org/20579/1/Gumpenstein.pdf |
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| Chaloupsky, Radovan; Honsova, Hana; Capouchova, Ivana; Konvalina, Petr; Stehno, Zdenek. |
| V laboratorních pokusech s pěti druhy jarních obilnin byla testována semenářská a biologická hodnota osiva (energie klíčení, klíčivost, energie vzcházení, vzcházivost, hmotnost tisíce semen). Porovnávalo se osivo ekologické certifikované, konvenční, farmářské pocházející z lepších pěstitelských podmínek a farmářské z horších pěstitelských podmínek. Osivo pocházelo ze sklizně roku 2010. V pokusech byly zjištěny rozdíly mezi jednotlivými kategoriemi osiva. V laboratorních pokusech se potvrdilo, že větší vypovídací schopnost o kvalitě osiva má laboratorní vzcházivost než standardní laboratorní klíčivost. Při porovnávání kategorií osiva se ukázalo, že se farmářské osivo získané z lepších pěstitelských podmínek může vyrovnat certifikovanému. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2013 |
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| Stehno, Zdenek; Bradova, J.; Dotlacil, Ladislav; Konvalina, Petr. |
| Proportion of landraces in the Czech collection of wheat genetic resources differentiates deeply among wheat species, 4.2 % in bread, 77.6 % in emmer and 80.0 % in einkorn wheat collection. The set of 10 selected emmer wheat landraces has been characterised by high molecular weight glutenin subunits (HMW-GSs), evaluated for 3 years in field trials and described by grain quality parameters. Emmer wheat accessions distinguished considerably in polymorphisms of HMW-GSs. Out of the total number of 10 studied emmer wheat landraces 5 accessions appeared to be homogeneous in the electrophoretic patterns of HMW-GSs and they were formed by a single glutenin line. Much higher crude protein content in comparison with check bread wheat cultivar was detected in all... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry Breeding; Genetics and propagation. |
| Ano: 2010 |
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| Konvalina, Petr; Capouchova, Ivana; Stehno, Zdenek; Moudry, Jan. |
| Organic farmers have become more interested in the marginally grown (neglected) cultivars, as spring forms of the hulled wheat varieties (eincorn, emmer wheat, spelta wheat) or intermediate forms of the soft wheat. 173 land races from the gene bank at the RI in Praha-Ruzyně were grown on the organic certified parcel and evaluated in 2008. The trial aimed to evaluate the conditions of the competitiveness to weeds, tolerance to diseases, assimilation of the sun shine and establishment of the yield. The results show that all the evaluated material inclines to the competitiveness to weeds. This ability is, nevertheless, reduced because of the inclination to the lodging (all the cultivars have long weak stalks). Eincorn and emmer wheat are resistant to mildew... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation. |
| Ano: 2010 |
URL: http://orgprints.org/20769/1/jcea112%2D11.pdf |
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| Dvoracek, Vaclav; Prohaskova, Anna; Bradova, Jana; Blaha, Ladislav; Stehno, Zdenek. |
| V předložené práci jsou hodnocena osiva různé provenience (konvenční, certifikované ze systému ekologického zemědělství a farmářské) u vybraných devíti odrůd jarních obilnin (pšenice seté, ječmen setý a pšenice dvouzrnka). Spektrum hodnocení zahrnoval stanovení odrůdové čistoty osiva a vybrané základní chemicko-technologické parametry včetně obsahu makro a mikroprvků. Z výsledků vyplývá, že vliv provenience se projevil u většiny sledovaných vlastností. Ve vzorcích farmářského osiva se vyskytovaly zejména genotypy, které neodpovídaly svým elektroforetickým spektrem žádné v ČR z registrovaných odrůd a byl identifikován i určitý počet heterozygotních zrn. Byl potvrzen trend nárůstu resp. poklesu makroprvků u farmářského osiva pšenice resp. ječmene. V rámci... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2013 |
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| Janovska, Dagmar; Stehno, Zdenek. |
| Kvalita osiva ovlivňuje významnou měrou následnou produkční schopnost porostu, a to nejen jeho vitalitu a výnos, ale i kvalitu. Nedostatky v kvalitě osiva a během ošetřování porostu není již možné odstranit posklizňovou úpravou. V současné době je v ekologickém zemědělství velmi rozšířené používání takzvaného farmářského osiva. |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Crop husbandry. |
| Ano: 2010 |
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| Konvalina, Petr; Moudry, Jan; Kalinova, Jana; Capouchova, Ivana; Stehno, Zdenek. |
| V metodice je zpracována problematika pěstování obilnin a pseudoobilnin jako hlavních tržních plodin ekologického zemědělství v ČR. První část zahrnuje obecné zásady pěstování rostlin (obilnin a pseudoobilnin). Zpracovány jsou základní legislativní normy a dotační tituly. Dále je důraz kladen na volbu vhodných druhů a odrůd. Významná je část věnovaná výživě a hnojení, osevním postupům, regulaci škodlivých činitelů, ale také finalizaci celoroční práce farmáře a to sklizni a posklizňové úpravě bioprodukce. V části věnované pěstování konkrétních druhů je kladen důraz na pěstování pšenice seté (ozimé i jarní formy), opomíjeny ale nejsou ani další pluchaté pšenice jako je špalda, dvouzrnka nebo jednozrnka. Další druhy jsou reprezentovány ječmenem, tritikalem,... |
| Tipo: Book |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2008 |
URL: http://orgprints.org/20810/1/9.f.g_metodika.pdf |
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| Skerikova, A.; Capouchova, Ivana; Konvalina, Petr; Stehno, Zdenek. |
| Soubor genetických zdrojů pšenice jednozrnky, dvouzrnky, jarní špaldy a přesívkových forem pšenice seté ze sbírek genobanky VÚRV Praha-Ruzyně, vypěstovaných v přesných polních pokusech v podmínkách ekologického systému tří pokusných lokalit (Praha-Ruzyně, Praha-Uhříněves a České Budějovice) byl hodnocen z pohledu obsahu N-látek v sušině zrna a zastoupení jednotlivých frakcí bílkovin zrna. Minoritní druhy pšenice se ve srovnání s kontrolními odrůdami pšenice seté vyznačovaly vyšším obsahem N-látek v sušině zrna, ale také rozdíly v zastoupení jednotlivých frakcí bílkovin ? především vyšším zastoupením nutričně cenných albuminů a globulinů a niţším zastoupením lepkových frakcí gliadinů a gluteninů. To naznačuje vyšší nutriční, ale horší technologickou,... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry. |
| Ano: 2010 |
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| Registros recuperados: 31 | |
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