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Results 1291 to 1320 of 4598:
Identification and functional analysis of the HvWRKY1 gene associated with Qingke (Hordeum vulgare L. var. nudum Hook. f.) leaf stripe diseaseOriginal PaperGang Jing, Youhua Yao, Likun An, Yongmei Cui, Yixiong Bai, Xin Li, Xiaohua Yao, Kunlun WuCzech J. Genet. Plant Breed., 2023, 59(4):263-277 | DOI: 10.17221/14/2023-CJGPB To explore the role of WRKY transcription factors (TFs) in the resistance process of Qingke (Hordeum vulgare L. var. nudum Hook. f.), leaves of the leaf stripe disease-resistant variety Kunlun 14 and the susceptible variety Z1141 were sequenced by transcriptome sequencing (RNA-seq). A differentially expressed gene HvnWKRY1 was identified, and its disease-resistance function was preliminarily analysed. The result showed that the open reading frame (ORF) of the gene was 1 062 bp and encoded 354 amino acids. It contained the conserved WRKY domain (273–351) and belonged to the WRKY protein family. The phylogenetic tree results showed that HvWRKY1 was most closely related to Hordeum vulgare L. The WRKY family of Qingke, barley, maize and rice were divided into categories I, II, and III, among which HvWRKY1 was located in group III. Results of the quantitative real-time fluorescence PCR (qRT-PCR) showed that the expression of HvWRKY1 was significantly (P < 0.01) higher in leaf stripe infected leaves of Kunlun 14 than that of Z1141. In Arabidopsis thaliana transformed with HvWRKY1, resistance to Botrytis cinerea was enhanced. The RNA-seq analysis showed there were 824 differentially expressed genes (DEGs). Data of the Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment indicated, that a plant-pathogen interaction pathway was enriched. This study is expected to provide a theoretical basis for further studies of functioning of the Qingke gene HvWRKY1 in resistance to the leaf stripe disease. |
Trust evolution, institutional constraints, and land trusteeship decisions among Chinese farmersOriginal PaperQi Li, Menghui GaoAgric. Econ. - Czech, 2023, 69(12):485-497 | DOI: 10.17221/232/2023-AGRICECON
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Chemical relationships in earthworm casts of two urban green spaces indicate the earthworm contribution to urban nutrient cyclesOriginal PaperMadalina Iordache, Iacob Borza, Valentina AndriucãSoil & Water Res., 2023, 18(4):219-226 | DOI: 10.17221/26/2023-SWR Due to the earthworms’ implications in nutrient cycles through their burrowing and casting activity, earthworms are worth considering when urban biogeochemical cycles are analysed. Several chemical parameters and their relationships were analysed in earthworm casts of two urban parks, namely the pH, total organic carbon (TOC), total nitrogen (Nt), plant available phosphorus (P), plant available potassium (K), and calcium water soluble (Ca). It was statistically significantly found that the TOC, Nt, P and K are reciprocally determined in the earthworm casts: 74.4% of the pH variability is co-determined by the N, P, K, TOC, and Ca contents; 95.9% of the Nt variability is co-determined by the pH, P, K, TOC, and Ca contents; 95.4% of the P variability is co-determined by the pH, N, K, TOC, and Ca contents; 94.5% of the K variability is co-determined by the pH, N, P, TOC, and Ca contents; 86.6% of the TOC variability is co-determined by the pH, N, P, K, and Ca contents. This study revealed the complexity of the chemical relationships inside earthworm casts, their reciprocal dependencies, and highlighted the complexity of the earthworms’ contribution to biogeochemical cycles in urban areas. Our findings propose earthworms as indicators of the integrative conservation management of urban ecosystems. |
Structural and weather-related factors of the sustainable intensification process in agriculture of the European Union regionsOriginal PaperJakub Staniszewski, Anika MuderAgric. Econ. - Czech, 2023, 69(10):385-393 | DOI: 10.17221/235/2023-AGRICECON
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Packaging types as influencing seed quality in some soybean [Glycine max (L.) Merr.] varieties during storage periodOriginal PaperRatna Wylis Arief, Robet Asnawi, Reny Debora Tambunan, Nila Wardani, Dewi Rumbaina Mustikawati, Made Jana MejayaCzech J. Food Sci., 2022, 40(3):229-239 | DOI: 10.17221/119/2021-CJFS The post-harvest process at the storage stage is one of the most critical processes for maintaining soybean seed quality. The type of packaging and the type of material stored will affect its shelf life. One type of packaging has specific properties that are different from other types of packaging. Therefore, this study used several types of packaging materials and soybean varieties to determine changes in its quality during storage. The treatments were arranged in a 5 × 4 × 7 factorial experiment in a randomised block design (RBD) with three replications, consisting of totally 140 treatment combinations involving five different types of packaging materials. Water content, the weight of 100 grains, seedling dry weight, electrical conductivity (EC), and germination percentage were assessed monthly. The factorial analysis of variance (ANOVA) was used to compare water content, the weight of 100 grains, EC, germination, and seedling dry weight. A qualitative descriptive analysis method was employed for the temperature and relative humidity of the storage room. The results showed that Grobogan had the lowest germination percentage of 84.85% compared to the other varieties (86.97-90.82%). Plastic sack resulted in the most inferior seed quality (82.00% for plastic sack vs. 88.23-90.17% for the other containers). A more extended storage period of soybean seeds caused a decrease in soybean quality for all varieties and packaging materials. Up to 6 months of storage at room temperature, the quality of soybean seeds remained high, with the lowest germination of 80%. |
Application strategy for sustainable livestock production with farm animal algorithms in response to climate change up to 2050: A reviewReviewSang-O ParkCzech J. Anim. Sci., 2022, 67(11):425-441 | DOI: 10.17221/172/2022-CJAS Global warming caused by climate change can increase heat stress and greenhouse gas (GHG) emissions, leading to food problems and livestock crises. Thus, pre-emptive responses are required to mitigate the food problems and livestock crises. The potential of a livestock crisis caused by global warming highlights the need for sustainable livestock production in response to climate change using a farm animal algorithm in order to address the population increase and avoid food problems in the future. In particular, the demand for animal-based foods has increased. Such a climate change threatens the livestock environment, production, reproductive efficiency, animal behaviour and welfare, while increasing the heat stress, livestock malodours, and GHG emissions. For these reasons, it is necessary to understand the concurrent mechanisms related to these effects of global warming, animal nutrition, animal feeding and management, animal heat stress and in ovo injection, and carbon neutral livestock. Climate-smart livestock systems are being implemented to overcome the livestock crisis caused by climate change and to maintain sustainable livestock production. This review emphasises the importance of sustainable livestock production using farm animal algorithms in response to a future livestock crisis caused by climate change in 2050. |
Patellar luxation and concomitant cranial cruciate ligament rupture in dogs - A reviewReviewM Candela Andrade, P Slunsky, LG Klass, L BrunnbergVet Med - Czech, 2022, 67(4):163-178 | DOI: 10.17221/111/2021-VETMED A patellar luxation and concomitant cranial cruciate ligament rupture is a common pathology in dogs. Diagnosis is based on clinical evidence of a patellar luxation and stifle joint instability. However, diagnostic imaging is required to assess the number of skeletal deformities and signs of instability. Surgical options include both soft tissue and osseous techniques, although, in most cases, a combination of multiple procedures is necessary to correct the patellar luxation and restore the stifle joint stability. Complication rates are generally low, but can include reluxation and implant-associated complications. This article describes the patellar luxation and cranial cruciate ligament rupture signs in dogs, including the clinical presentation and diagnosis, and discusses current treatment options. |
Diverse role of basic Helix-Loop-Helix (bHLH) transcription factor superfamily genes in the fleshy fruit-bearing plant speciesReviewNoor Muhammad, Nisar Uddin, Muhammad Khalil Ullah Khan, Niaz Ali, Kishwar Ali, David Aaron JonesCzech J. Genet. Plant Breed., 2023, 59(1):1-13 The basic Helix-Loop-Helix (bHLH) superfamily is the most widespread family of transcription factors in eukaryotic organisms, which can activate the expression of genes by interacting with specific promoters in the genes. The bHLH transcription factors direct the development and metabolic process of plants, including flowering initiation and secondary metabolite production, by attaching to specific sites on their promoters. These transcription factors are essential for encouraging plant tolerance or the adjustment to harsh environmental conditions. The involvement of bHLH genes in anthocyanin formation in fleshy fruit-bearing plants, as well as the role of these genes in response to stimuli including drought, salt, and cold stress, are discussed in this article. New concepts and goals for the production of stress-tolerant fruit species are suggested. Furthermore, solid evidence for the critical role of bHLH genes in the growth and development, as well as anthocyanin biosynthesis in fleshy fruit plants, are also presented in this article. This review identifies several future research directions that can shed light on the roles of bHLH genes in fruit-bearing plants and will assist the use of these genes in efforts to breed fruit crop varieties that are more resistant to stress. Generally, there has been little research carried out on the role of bHLHs transcription factor family genes in fleshy fruit-bearing plant species and more in-depth studies are required to fully understand the diverse role of bHLH genes in these species. |
Experimental evaluation of milk yield and selected traits of milk quality in Clun Forest ewesOriginal PaperJan Kuchtík, Kvìtoslava ©ustová, Tomá¹ Kopec, Ferenc Pajor, Leona KoneènáCzech J. Anim. Sci., 2023, 68(7):306-312 | DOI: 10.17221/221/2022-CJAS
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Organic fertilization induces changes in soil nitrogen mineralization and enzyme activitiesOriginal PaperMaría Rosa Yagüe, Carmen Lobo, Pilar GarcíaPlant Soil Environ., 2023, 69(1):38-43 | DOI: 10.17221/274/2022-PSE In this study, we addressed the reuse of two organic waste products as fertilisers. To this end, soil fertilised with the spent mushroom substrate (SMS) or with an anaerobic digestate (DIG) was subjected to an incubation assay, and the results were compared with those from soil treated with a mineral fertiliser (MIN) and an unfertilised soil (CO). The soil was sampled after fertilisation and after 90 days of aerobic incubation. Nitrogen (N) mineralisation (NH4+ and NO3–) and oxidable carbon (OC) were determined. The impact of the treatments on the soil was evaluated by measuring the enzymatic activity of arylsulfatase (ARYL), ß-galactosidase (GAL), and urease (URE). The highest OC content was observed in the SMS treatment. After 90 days of incubation, the SMS treatment showed a lower mineral N content than the CO treatment. This finding was associated with N immobilisation. However, mineral N significantly increased ARYL activity in the DIG and MIN treatments, and URE activity was always higher at both sampling times in the SMS treatment. Initially, GAL activity was notably high in the DIG treatment but decreased after incubation, reaching similar values to those registered in the CO treatment. Organic fertilisation treatments induced different effects on soil N mineralisation, showing changes in the activity of the enzymes analysed. |
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Influence of the surface/volume ratio on the rheological properties of starch dispersionsOriginal PaperGerardo Lopez-Echevarria, Jorge Adalberto Huerta-Ruelas, Gonzalo Velazquez, Martin Jesús Nieto-Perez, Guadalupe Mendez-MontealvoCzech J. Food Sci., 2023, 41(1):54-63 | DOI: 10.17221/155/2022-CJFS
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Vital rates and their multidecadal trends in the fir-beech old-growth forest of Badínsky pralesOriginal PaperLadislav ©umichrast, Peter Jaloviar, Matú¹ Komendák, Samuel Targo¹, Stanislav KucbelJ. For. Sci., 2023, 69(3):93-100 | DOI: 10.17221/167/2022-JFS
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Incidence of thermophilic, grass and rare arable weeds in cereal fields in the Czech and Slovak RepublicOriginal PaperMichaela Koláøová, Ludìk Ty¹er, Theresa A. Reinhardt Piskáèková, Jana MájekováPlant Soil Environ., 2023, 69(3):131-140 | DOI: 10.17221/439/2022-PSE Our objectives were to characterise arable weeds of the Czech and Slovak Republic in cereals, especially considering important groups of species: thermophilic, weedy grasses, and rare and endangered species. The three-year phytocoenological survey was conducted from 2006 to 2008 in five climatic regions and eight different soil types. 379 relevés were recorded, and 281 weed species were found. The effects of both the climatic region and soil type were found to be statistically significant. Species richness increased with altitude. Several species were distinctly associated with soil type, from fertile chernozems to less fertile cambisols, while fluvisols were strongly associated with e.g. Calystegia sepium (L.) R. Br. The incidence of species outside their expected regions generally fit two categories: the most pervasive weeds found almost in all climate regions, such as Echinochloa crus-galli (L.) P. Beauv., or rare weeds in higher altitudes than expected, such as Lolium temulentum L. Rare and endangered species were more likely to be found in a colder climate and poorer soils, and this is linked to less intensive management; however, not all endangered arable species can tolerate such conditions. Even though this data is not recently collected, this is still valuable information on the distribution of weedy species, especially concerning the current interest in maintaining biodiversity. |
Corporate governance, ownership concentration and performance of European agricultural companies: New empirical evidenceOriginal PaperGraþiela Georgiana Noja, Mirela Cristea, Nicoleta Sîrghi, Oana-Ramona Socoliuc Gurițã, Ioana Vãdãsan, Daniel CîrciumaruAgric. Econ. - Czech, 2023, 69(4):151-161 | DOI: 10.17221/78/2023-AGRICECON
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Pyrethroid susceptibility and oxidative detoxification mechanism in Colorado potato beetle and western corn rootwormOriginal PaperDaria Dworzañska, Joanna Zamojska, Pawe³ Wêgorek, Pawe³ K. Bere¶, S³awomir DrzewieckiPlant Protect. Sci., 2023, 59(2):174-184 | DOI: 10.17221/53/2022-PPS The Colorado potato beetle (CPB) and the western corn rootworm (WCR) are among the world’s most expansive insect pests. The aim of the study was to assess, for the first time in Poland, the levels of susceptibility to deltamethrin and tau-fluvalinate in the WCR and to determine the current status of susceptibility to those active substances in the CPB. In addition, the role of oxidative metabolism in the detoxification of pyrethroids was determined using piperonyl butoxide (PBO). The study found pyrethroid resistance in the CPB populations. The WCR populations exhibited “high susceptibility”, “susceptibility”, “low resistance” and “medium resistance” to the pyrethroids tested. Experiments using PBO showed that oxidative enzymes are involved in the deltamethrin detoxification mechanism in the CPB, although the effectiveness of this mechanism in Poland is decreasing. PBO was found to be highly toxic to the WCR populations. The findings from this study should be taken into account when developing a strategy to prevent the development of resistance in the pest species. The results for the toxicity of PBO to Polish WCR populations demonstrated that the enzymes inhibited by PBO are involved in important metabolic processes, which should be considered when developing innovative control methods for this pest. |
Effect of forest management on the genetic diversity of Abies hidalgensis, a threatened species with restricted distributionOriginal PaperElena Rosales-Islas, Pablo Octavio-AguilarJ. For. Sci., 2023, 69(5):193-204 | DOI: 10.17221/13/2023-JFS
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Complete chloroplast genome sequence and characteristics analysis of Qingda no.1 alfalfa (Medicago sativa L. cv. Qingda no.1)Original PaperYuling Ren, Yajun Ma, Xue Li, Xiaoan Li, Guozhu Yang, Ping LiCzech J. Genet. Plant Breed., 2023, 59(3):160-168 | DOI: 10.17221/71/2022-CJGPB Medicago sativa is the most widely cultivated forage legume and one of the most economically valuable crops throughout the world. Qingda no.1 (Medicago sativa L. cv. Qingda no.1) is an excellent alfalfa local variety with strong cold, drought and salt resistance in the three rivers source area of Qinghai. In this study, the whole chloroplast (cp) genome of Qingda no.1 was sequenced, assembled and its structure was analysed by the Illumina high-throughput sequencing technology. The results showed that the chloroplast genome of Qingda no.1 exhibits no obvious typical quadripartite structure; the total length of the chloroplast genome is 125 637 bp; the chloroplast genome contained 111 genes, including 77 protein-coding genes, 30 tRNA genes, and 4 rRNA genes, with an overall GC content of 38.33%. The relative synonymous codon usage showed that 68.67% of the codons RSCU > 1 in Qingda no.1, with the preference ending with A and T. The simple sequence repeat (SSR) analysis identified 62 SSR loci. The phylogenetic analysis of the cp genome, Qingda no.1 clustered closely with Medicago sativa KU321683 (Medicago sativa L. cv. KU321683). These results are helpful for the further study of the Qingda no.1 adaptation mechanism to high altitude stress environments. |
Impact of political and security stability on food security in developing countries: Case of Africa, Asia, Latin America and the CaribbeanCase StudyJangkung Handoyo Mulyo, Imade Yoga Prasada, Agus Dwi NugrohoAgric. Econ. - Czech, 2023, 69(9):375-384 | DOI: 10.17221/142/2023-AGRICECON
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Responses in leaf water status of Quercus castaneifolia C.A.Mey and Carpinus betulus L. exposed to cement dust pollution in Northern IranOriginal PaperJamshid Eslamdoust, Seyed Mohsen Hosseini, Fatemeh KardelJ. For. Sci., 2023, 69(8):325-333 | DOI: 10.17221/14/2023-JFS Industrial air pollution, particularly cement dust, affects the leaf water status and resource utilisation and finally decreases primary production. Evaluating the relative water content (RWC), leaf mass per unit area (LMA), specific leaf area (SLA), and leaf water per unit area (LWA) helps selecting more tolerant species for dusty polluted areas. In this study, we compare two species of Quercus castaneifolia C.A.Mey and Carpinus betulus L. in a polluted site (PL) around a cement factory, and a unpolluted site (UPL) in Mazandaran province, Northern Iran. Ten individual trees of each species were tagged at each site, and twenty fully developed leaves were collected for further analysis and calculation. Based on the results, RWC and LWA were significantly lower in the PL site (61.0% and 0.0075 g·cm–2, respectively) compared to the UPL site (71.1% and 0.0114 g·cm–2, respectively) for Q. castaneifolia. However, no significant differences were observed in selected variables between PL and UPL sites for C. betulus. Among the studied variables, SLA was significantly higher in C. betulus (259.1 cm2·g–1) compared to Q. castaneifolia (189.8 cm2·g–1). Our results indicated that C. betulus responds better to dust pollution in terms of leaf water variables. |
The effect of different cooking methods on the antioxidant activity of wild Swiss chard (Beta vulgaris L. var. cicla)Original PaperYagmur Demirel Ozbek*, Ozlem SaralCzech J. Food Sci., 2023, 41(5):375-381 | DOI: 10.17221/114/2023-CJFS
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Mechanization’s impact on agricultural total factor productivityOriginal PaperYuxin CuiAgric. Econ. - Czech, 2023, 69(11):446-457 | DOI: 10.17221/291/2023-AGRICECON Agricultural mechanisation is rapidly increasing in China and will have an increasing impact on agricultural total factor productivity (TFP) in the future. This study uses panel data from 27 provinces in China, spanning the years 2001‒2020, to measure agricultural TFP, and estimates the effects of mechanisation on TFP, technical efficiency, and technological progress. The results reveal that the level of agricultural mechanisation can promote TFP. TFP has a cumulative effect in the previous period, which can also significantly affect TFP in the current period. The level of agricultural mechanisation improves technical efficiency and promotes technological progress, but this is not statistically significant. Regional heterogeneity exists in mechanisation’s effect on agricultural TFP, with the largest effect occurring in the group with the lowest TFP. Therefore, efforts to promote the use of agricultural machinery should increase. China’s agricultural machinery subsidy policy must be further adjusted, and agricultural machinery research investments increased, while the government must address the heterogeneity between regions and focus on developing agricultural mechanisation in the central and western regions. |
Identification and functional analysis of glyoxal oxidase gene from rubber tree anthracnoseOriginal PaperXuemei Xian, Kunmeng Li, Hui Liu, Zhenhui Wang, Kun Yuan, Yiyu Hu, Chengtian Feng, Meng Wang, Chunhua Lin, Qiguang He, Yu ZhangPlant Protect. Sci., 2023, 59(4):337-347 | DOI: 10.17221/52/2023-PPS Glyoxal oxidase (GLOX, EC 1.2.3.15) is a class of hydrogen peroxide synthases involved in lignin degradation. Several GLOX genes of biotrophic and necrotrophic phytopathogenic fungi have been confirmed to contribute to fungal growth, development, and pathogenicity. However, the composition, sequence characteristics and functions of genes in the GLOX family of hemi-biotrophic phytopathogenic fungi remain poorly understood. This study identified a GLOX-encoding gene CsGLOX in the hemi-biotrophic phytopathogenic fungus Colletotrichum siamense by bioinformatics analysis and PCR cloning. The encoded protein contains a signal peptide and five cell wall stress-responsive component (WSC) domains at the N terminus, followed by a catalytic structural domain (AA5_1). CsGLOX-deficient mutants were constructed by homologous replacement, which significantly increased the formation of conidia and reduced the pathogenicity and the high-osmotic stress tolerance of the fungus. However, the deletions did not influence fungal filamentous growth. This study proposes that the CsGLOX gene is involved in pathogen conidial formation, pathogenicity, and osmotic stress response, which deepens our understanding of the pathogenic mechanism of hemi-biotrophic phytopathogenic fungus C. siamense. |
Effect of the vaccination against Shiga toxin 2e in a farm with history of oedema disease, caused by atypical Escherichia coli producing Shiga toxin (STEC)Original PaperD Sperling, N Isaka, H Karembe, J Vanhara, J Vinduska, N Strakova, A Kalova, IvKolackova, R KarpiskovaVet Med - Czech, 2022, 67(10):510-518 | DOI: 10.17221/36/2022-VETMED Oedema disease of weaned piglets is caused by shigatoxigenic Escherichia coli (STEC), typically harbouring the stx2e gene and F18 adhesins. The aim of this study was to assess the effect of a commercially available oedema disease vaccine on the zootechnical performance, mortality and individual antibiotic treatment in a herd, in which non-typical STEC strains without F18 adhesin have been identified. The zootechnical performance (average daily gain, total weight gain), mortality and individual antibiotic treatment were compared between vaccinated and non-vaccinated control piglets in a monocentric field efficacy study, which was performed using two groups in a parallel, randomised design. A significantly higher average daily gain and total weight gain were recorded in the vaccinated piglets in comparison to the controls. The lower morbidity, mortality and antibiotic treatment in piglets in the vaccine group were not statistically significant. As a conclusion, the positive effect of the vaccination was confirmed in the herd with prevalent STEC not harbouring F18 adhesin. The vaccine was, therefore, also effective against oedema disease caused by such unusual STEC isolates, under the conditions of this study. |
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Presence of zoonotic black-pigmented periodontal pathogens in the oral microbiota of pet and stray catsOriginal PaperV Ozavci, HTY Dolgun, S KirkanVet Med - Czech, 2023, 68(2):62-68 | DOI: 10.17221/59/2022-VETMED Black-pigmented bacteria are one of the neglected species to cause periodontal disease in cats, and they are also zoonotic agents that pose an infection risk to humans. In this study, we aimed to determine the presence of Porphyromonas gingivalis, Porphyromonas gulae and Prevotella nigrescens in the oral microbiota of pet and stray cats. Dental swab samples were taken from 25 pet cats and 25 stray cats with symptoms of periodontal disease and then investigated by multiplex polymerase chain reaction using 16S rRNA species-specific primers. As a result of the multiplex PCR analysis, P. gingivalis 3/25 (12%), P. nigrescens 1/25 (4%), P. gingivalis + P. gulae 7/25 (28%), P. gingivalis + P. nigrescens 1/25 (4%), P. gulae + P. nigrescens 1/25 (4%), and P. gingivalis + P. gulae + P. nigrescens 2/25 (8%) were molecularly typed in the pet cats. In addition, 1/25 (4%) of P. gulae and 21/25 (84%) of P. gingivalis + P. gulae were typed in the stray cats. In 10/25 (40%) pet and 3/25 (12%) stray cat samples, no bacteria were detected by molecular typing. In summary, the results provide strong evidence that black-pigmented zoonotic pathogens are associated with cat periodontal disease. |
Delineation of inbred lines of Indian mustard into diverse gene pools based on agro-morphological traitsOriginal PaperKunwar Harendra Singh, Guman Singh, Lal Singh, Nashra Aftab, Ajay K. ThakurCzech J. Genet. Plant Breed., 2023, 59(2):109-116 | DOI: 10.17221/75/2022-CJGPB The present study was conducted to explore the variability generated through recombination breeding for nine economically important traits in Indian mustard (Brassica juncea L. Czern & Coss.). Delineation of the inbred lines to different gene pools, based on genetic diversity, enables their utilisation in hybrid breeding. The unweighted pair group method with arithmetic mean (UPGMA) and a Euclidean distance matrix was used to delineate the inbred lines to clusters. The variability was studied using the range and coefficients of variation of the traits. Significant variability was observed for all studied traits except for oil content and days to maturity. 128 Indian mustard genotypes were grouped into four distinct gene pools based on genetic diversity. A set of 20 most diverse genotype combinations was produced. Promising inbred lines were identified and recommended as donors for the respective trait. The pedigree analysis of the inbred line groups revealed, that recombination breeding caused a large diversity as confirmed by the assignment of inbred lines with the same parentage to specific clusters. |
Utilisation of rheological models for describing the mechanical behaviour of oil palm empty fruit bunches under compression loadingOriginal PaperTomá¹ Saller, David HerákRes. Agr. Eng., 2023, 69(4):199-205 | DOI: 10.17221/17/2023-RAE This study uses rheological models to describe the mechanical behaviour of oil palm empty fruit bunches (EFB) under compression loading. The oil palm empty fruit bunches were obtained from North Sumatra, Indonesia. The rheological models for different fraction sizes of the mechanical behaviour under compression loading were developed based on a mathematical concept involving spring and dashpot components. The dependencies between fraction size, viscosity, and modulus elasticity were determined and mathematically described for each branch of the rheological model. The general rheological model was developed based on the defined dependencies, considering the deformation and fraction sizes. The determined rheological models and their components could be used as a fundamental building block of digital twins of oil palm empty fruit bunches, and they could be used to optimise the compressing technology and increase the efficiency of the entire pressing process. |
Effect of ultrasound on isolation and properties of oat starchOriginal PaperEsra Baºarıcı Ünlü, Çiğdem Aykaç*Czech J. Food Sci., 2023, 41(2):111-117 | DOI: 10.17221/94/2022-CJFS The aim of the present study was to analyse the effect of ultrasound (US) on the isolation and properties of oat starch. Starch isolation was done by a water extraction method and with sonication for 30 (US30), 45 (US45) and 60 (US60) min. The highest starch yield was found in US45 as 49.04 g·100 g–1 of oat flour when the extraction time decreased from 6 h to 45 min. The functional properties of starches, such as bulk density, water solubility index, dispersibility and water absorption capacity, ranged from 0.65 to 0.80 g·mL–1, 3.22 to 5.75%, 78 to 87.5% and 84.23 to 95.87%, respectively. US45 had lower bulk density and higher dispersibility than other starches. US treatments decreased the gelatinisation temperature ranges and increased the gelatinisation enthalpy values. The enthalpy of the gelatinisation value of oat starch was found as 8.45 J·g–1 and increased with sonication up to 13.65 J·g–1. Retrogradation endotherms were observed after 6 days of storage, and enthalpies of retrogradation were lower than in the gelatinised starches. Fourier transform infrared spectroscopy (FTIR) spectra showed that US treatment did not affect the functional groups of oat starch. US application during oat starch isolation gave desired results, such as time reduction, higher yields and increased functional properties. |
